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Smith-Blair Flanged Coupling Adapters
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$10,876.48
Smith-Blair Style 920 FlangeLock Restrained FCA for PVC Pipe | Cam-Lock | 3"–36"
Smith Blair
Smith-Blair Style 920 FlangeLock Restrained FCA for PVC Pipe | Cam-Lock | 3"–36"
- Price
- From $585.89
Smith-Blair Style 923 FlangeLock MJ Coupling Body | Flange x MJ | Restrained | 3"–48"
Smith Blair
Smith-Blair Style 923 FlangeLock MJ Coupling Body | Flange x MJ | Restrained | 3"–48"
- Price
- From $446.33
Smith-Blair Style 912 Cast Ductile Iron Flanged Coupling Adapter | OMNI Gasket | 3"–12"
Smith Blair
Smith-Blair Style 912 Cast Ductile Iron Flanged Coupling Adapter | OMNI Gasket | 3"–12"
- Price
- From $443.95
Smith-Blair Style 913 Fabricated Steel Flanged Coupling Adapter | Plain x Flange | 3"–24"
Smith Blair
Smith-Blair Style 913 Fabricated Steel Flanged Coupling Adapter | Plain x Flange | 3"–24"
- Price
- From $773
Smith-Blair Style 914 Reducing Flanged Coupling Adapter | Plain x Flange | All Pipe Types
Smith Blair
Smith-Blair Style 914 Reducing Flanged Coupling Adapter | Plain x Flange | All Pipe Types
- Price
- Call for pricing
Smith-Blair Style 911 FlangeLock Restrained FCA | Ductile Iron & Steel | Cam-Lock | 3"–48"
Smith Blair
Smith-Blair Style 911 FlangeLock Restrained FCA | Ductile Iron & Steel | Cam-Lock | 3"–48"
- Price
- From $443.34
Smith-Blair Style 921 Top Bolt Flanged Coupling Adapter | Plain x Flange | 2"–12"
Smith Blair
Smith-Blair Style 921 Top Bolt Flanged Coupling Adapter | Plain x Flange | 2"–12"
- Price
- From $416.18
Smith-Blair Flanged Coupling Adapters
Description
Authorized Smith-Blair Distributor · Houston, TX
Smith-Blair
Flanged Coupling
Adapters
Seven styles. One job: connecting plain-end pipe to flanged valves, meters, pumps, and fittings — without welding, without fabricated spools, and without a large crew. From 2" to 48" nominal size. Ductile iron, steel, PVC, and more. Restrained and non-restrained configurations. Same-day quote response from Houston stock.
7 Styles
911 · 912 · 913 · 914 · 920 · 921 · 923
2"–48"
Nominal Size Range
150–300 PSI
Working Pressure
Same Day
Quote Response
Start Here
Which Smith-Blair FCA Do You Need?
The seven styles look similar but serve different pipe materials, restraint requirements, and installation constraints. Match your situation below and you’ll know exactly which style to order.
Ductile iron or steel pipe — need restraint?
Integral cam-lock wedge restraint grips the pipe OD — no concrete thrust block needed. Standard specification for DI water main connections to flanged valves and hydrants.
→ Style 911 FlangeLock DI/Steel
PVC pipe — need restraint?
Same cam-lock restraint geometry adapted for C-900 and C-905 PVC OD tolerances. Bite geometry is specific to PVC — do not substitute Style 911 on PVC pipe.
→ Style 920 FlangeLock PVC
Large diameter or combining with your own MJ gland?
Body-only adapter that combines with any standard MJ restraint gland, MJ gasket, and T-bolts. Pipe passes completely through the body for easier positioning on large sizes.
→ Style 923 MJ Coupling Body
DI pipe, 3"–12", thrust block provided?
Cast ductile iron body with OMNI-compatible gasket system. One body per nominal size with color-coded follower flanges by pipe type. Ships complete with flange bolts.
→ Style 912 Cast DI
Steel pipe, 3"–24", thrust block provided?
Fabricated steel body, NSF 61/372 Buna-N gasket, AWWA C219. Covers 5" and 14"–24" not available in the 912. The non-restrained choice for larger steel pipe.
→ Style 913 Fabricated Steel
Connecting to a different-size flange?
One unit replaces a reducer plus a standard FCA. Order by specifying your pipe OD (coupling end) and the flange nominal size (flanged end) — two catalog codes combined.
→ Style 914 Reducing FCA
Wide OD range, tight vault, or field gasket replacement?
Patented top-bolt design. Removable channeled inner gasket — the only FCA where you can replace the gasket without removing the adapter. Works on DI, steel, PVC, copper, HDPE.
→ Style 921 Top Bolt
Education
Key Terms Explained
Smith-Blair datasheets assume familiarity with waterworks terminology. Here’s what every term actually means so you can read a spec sheet and order correctly the first time.
Most Important
Restrained vs Not
The single most important distinction
- Non-restrained FCASeals only — external thrust block required
- Restrained FCASeals + grips pipe — no thrust block needed
- ThrustOutward force from pressure at every direction change
- Thrust blockConcrete mass that resists thrust externally
- Pull-outPipe ejecting from the joint under thrust
Restraint Mechanism
Cam-Lock
Smith-Blair’s integral restraint system — Styles 911 & 920
- WedgesMultiple single-tooth DI wedges in the follower gland
- Breakaway nutTorque-indicating nut that snaps at full engagement
- Torque (911)45–60 ft·lbs per wedge
- Torque (920)40–60 ft·lbs per wedge
- Snap = confirmationNut breakaway confirms full wedge engagement
Connection Hardware
MJ & T-Bolts
Mechanical joint standard hardware — AWWA C111
- MJ (Mechanical Joint)AWWA-standard gland + gasket + T-bolt connection
- T-boltT-head locks into follower slot; tighten from nut side only
- Follower glandRing that compresses gasket against pipe OD
- Cross boltStandard hex bolt used on Style 912 body
- AWWA C111Standard governing all MJ dimensions & tolerances
Style 912 Only
OMNI Gasket
Interchangeable with OMNI coupling system gaskets
- OMNI systemSmith-Blair coupling gasket standard; widely stocked
- Blue followerDuctile iron OD pipe
- Red followerIron pipe size (IPS) OD pipe
- Gray followerAsbestos cement OD pipe
- One bodyUniversal per nominal size; follower changes by pipe type
All Styles
Flexi-Coat
Fusion-bonded epoxy finish — factory applied
- StandardAWWA C213 fusion-bonded epoxy
- Thickness12–15 mils (Style 921); 911/912/913 per C213
- ApplicationFactory powder coat, fused at high temperature
- Bond typeMolecular — not field paint
- Potable waterNSF 61 compliant on gaskets; Buna-N NSF 61 certified
Critical Ordering Note
OD Range
Order by actual pipe OD — not nominal size
- 6" Ductile Iron OD6.90" actual
- 6" PVC C-900 OD6.63" actual
- 6" Steel (IPS) OD6.00" actual (schedule dependent)
- 6" Cast Iron OD6.90" actual
- Measure withCaliper or check mill certificate
FlangeLock® · Integral Restraint · No Thrust Block Required
Restrained Flanged Coupling Adapters
Styles 911, 920, and 923 all provide mechanical pipe restraint. The right choice for trenchless installations, valve replacements on live mains, tight excavations, and any location where pouring thrust blocks is impractical or prohibited by project specifications.
Style 911 — FlangeLock Restrained FCA · Ductile Iron and Steel
The 911 is the standard waterworks specification product for connecting ductile iron and steel pipe to flanged valves, hydrants, meters, and fittings with integral restraint. Patents US 7484775, US 7748100, CA 2511782. The Cam-Lock gland contains multiple single-tooth ductile iron wedges — on DI pipe, the wedges are heat-treated for maximum grip. Torque breakaway nuts to 45–60 ft·lbs per wedge; the nut snaps confirming engagement. Reducing style available.
Pipe: Ductile Iron (all sizes)
Pipe: Steel (3"–12" only)
Sizes: 3"–48"
Std Pressure: 150 PSI
DI ≤16" option: 300 PSI w/ 300 lb flange
DI 18"–48": 250 PSI max
Steel 3"–12": 250 PSI max
Restrained: Yes — Cam-Lock integral
Pressure Limits by Pipe Material
DI pipe 3"–16": up to 300 PSI with 300 lb flange option (specify at order — not a field modification). DI pipe 18"–48": 250 PSI max regardless of flange class. Steel pipe 3"–12": 250 PSI max. Standard configuration ships with AWWA C207 Class D ANSI 150 lb flat face flange.
⚠ Do Not Use 911 on PVC or Steel Above 12"
The 911 wedge is heat-treated for ductile iron pipe hardness. PVC is too soft — use Style 920. Steel pipe above 12" is outside the 911’s tested engagement range — contact Smith-Blair engineering for large steel pipe applications.
Deflection Allowance by Size
3"–12": 5° · 14"–16": 2° · 18"–24": 1.5° · 30"–48": 1°. Measured at minimum pipe insertion from flange face.
Style 911 — Material Specifications
SleeveASTM A36 / A283 Gr. C carbon steel, min 30,000 PSI yield
FlangeAWWA C207 Class D, ANSI 150 lb, flat face
Cam-Lock Gland65-45-12 Ductile Iron (ASTM A536)
WedgesSingle-tooth DI, heat-treated for DI pipe
Actuating Bolts60-40-18 Ductile Iron (ASTM A536)
Breakaway NutsCarbon steel or cast iron
Gasket (Kit)SBR MJ per AWWA C111 / ANSI A21.11; Multi-Seal optional 4"–12"
T-Bolts (Kit)HSLA per AWWA C111; optional 304 SS fluoropolymer-coated ✓
Wedge / Bolt FinishE-coated epoxy
Body FinishFlexi-Coat® fusion-bonded epoxy per AWWA C213 ✓
Reducing StyleAvailable ✓
300 lb Flange OptionAvailable (DI through 16") ✓
Style 920 — FlangeLock Restrained FCA · PVC Pipe
The 920 is the PVC-specific restrained FCA with Cam-Lock joint restraint. It is not interchangeable with the 911 — the OD ranges and bite geometry are calibrated for C-900 and C-905 PVC pipe, which has different wall thickness and surface hardness than ductile iron. Available 3" through 36". Working pressure: 175 PSI for 3"–12"; 150 PSI for 14"–30".
For 3"–12" sizes, Smith-Blair offers dual-OD-range catalog numbers (suffix -100) that accommodate both PVC and DI ODs in one adapter — useful when pipe type is not confirmed at time of order. Single-OD numbers (suffix -000) are available when the pipe material is known.
Pipe: PVC (C-900 / C-905)
Pipe: Ductile Iron
Sizes: 3"–36"
3"–12": 175 PSI
14"–30": 150 PSI
Restrained: Yes — Cam-Lock integral
Style 920 — Material Specifications
SleeveASTM A36 / A283 Gr. C carbon steel
FlangeAWWA C207 Class D, ANSI 150 lb, flat face
Gland65-45-12 Ductile Iron (ASTM A536)
WedgesSingle-tooth DI (PVC-optimized bite geometry)
Breakaway Torque40–60 ft·lbs per wedge
Gasket (Kit)SBR Standard MJ per AWWA C111; Multi-Seal optional 4"–12"
T-Bolts (Kit)Optional 304 SS fluoropolymer-coated ✓
FinishFlexi-Coat® fusion-bonded epoxy ✓
Dual OD Range OptionYes — suffix -100 catalog numbers ✓
Style 923 — Flange-Lock® MJ Coupling Body Only
The 923 is a flanged adapter body only — it ships without the restraint gland, gasket, or T-bolts. You combine it with a standard mechanical joint restraint gland, MJ gaskets, and T-bolts of your specification. The key advantage: pipe can pass completely through the body, making positioning and alignment far easier on large-diameter installations. This pass-through feature is not available with raised-face flanges. Use the Multi-Seal Gasket for 4"–12" nominal sizes for additional OD flexibility.
Pipe: PVC
Pipe: Steel
Pipe: Ductile Iron
Sizes: 3"–48"
PVC 4"–24": 250 PSI
30": 150 PSI
36" PVC: 125 PSI
Ships as: Body only — add MJ gland, gasket, T-bolts
What You Combine with the 923 Body
1
Style 923 Body
Flanged adapter sleeve with AWWA C207 Class D flat face flange. Standard sizes 14"–48"; smaller sizes available on request.
2
MJ Restraint Gland
Standard AWWA C110/C153 compliant MJ restraint gland supplied separately. Must match pipe OD, pipe material, and nominal size.
3
MJ Gasket
SBR standard MJ gasket per AWWA C111. For 4"–12", Multi-Seal Gasket provides additional OD range flexibility.
4
T-Bolts
High-strength low-alloy per AWWA C111. Optional 304 stainless steel fluoropolymer-coated for corrosive or submerged environments.
Non-Restrained · Thrust Block or Tie-Rods Required
Standard Flanged Coupling Adapters
Styles 912 and 913 do not include integral restraint. Use where concrete thrust blocking, tie-rod systems, or a fully restrained pipeline provides the reaction. Lowest installed cost per connection — appropriate for the majority of conventional in-ground valve, meter, and pump connections.
Style 912 — Cast Ductile Iron FCA (OMNI Compatible Gasket)
The 912 is the only cast ductile iron body in the Smith-Blair FCA lineup — all other styles are fabricated steel. This makes the 912 the heaviest-duty body in the 3"–12" range. Ships complete including flange bolts, meets AWWA C219, and uses the OMNI-compatible gasket system. One body per nominal size: add the correct color-coded follower flange (blue/red/gray) and the appropriate OMNI gasket for your pipe OD range. Optional anchor studs — installed at the factory only on customer request — add partial restraint capability.
Pipe: Ductile Iron
Pipe: Cast Iron
Pipe: Steel
Pipe: PVC
Pipe: Asbestos Cement
Sizes: 3"–12"
Working: 250 PSI
Restrained: No (anchor studs optional)
Ships: Complete with flange bolts
Color-Coded Follower Flange System
Blue follower = Ductile Iron OD · Red follower = Iron Pipe Size (IPS) OD · Gray follower = Asbestos Cement OD. One 912 body handles every pipe type for that nominal size — only the follower and gasket change. This eliminates the guesswork of selecting which body to order and simplifies stocking.
Style 912 — Material Specifications
BodyDuctile Iron ASTM A536
FollowerDuctile Iron ASTM A536
GasketNitrile (Buna-N) — NSF/ANSI 61 certified ✓
Gasket Temp Range−20°F to +180°F
O-RingNitrile
NutsHSLA per AWWA C111 · Optional 304 SS
Tee BoltsDuctile Iron
Cross BoltsDuctile Iron
StudsASTM A193 Grade B7 electro-galvanized w/ dichromate seal
FinishFlexi-Coat® fusion-bonded epoxy ✓
StandardAWWA C219
Anchor StudsFactory-installed on request only
Style 913 — Fabricated Steel FCA
The 913 is a fabricated carbon steel FCA covering 3" through 24" — the broadest nominal size range of any single non-restrained Smith-Blair FCA style, and the only one covering 5", 14", 16", 18", 20", and 24". NSF 61/372 certified. The follower is ductile iron for 3"–12"; heavy rolled steel AISI C1020 for 14" and above. Optional anchor studs provide partial restraint when pipe has been pre-drilled — factory-installed only, and the pipe must be field-drilled to accept them.
Pipe: Steel
Pipe: Ductile Iron
Pipe: Cast Iron
Pipe: PVC
Pipe: Asbestos Cement
Sizes: 3"–24" (larger on request)
Working: 150 PSI
Restrained: No (anchor studs optional)
Certifications: NSF 61 & 372
⚠ Anchor Studs Require Pre-Drilled Pipe
Anchor studs on Style 913 must be ordered factory-installed. The pipe must be pre-drilled in the field to accept the studs before installation. This is partial restraint only — for full certified pull-out resistance, specify Style 911 (DI/steel) or 920 (PVC).
Style 913 — Material Specifications
BodySteel ASTM A53 / A283 Gr. C, min 30,000 PSI yield
Flange (3"–5")ANSI 150 lb flat face
Flange (6" and above)AWWA C207 Class D ANSI 150 lb
Follower (3"–12")Ductile Iron ASTM A536
Follower (14" and above)Heavy rolled steel AISI C1020
GasketNitrile (Buna-N) — NSF/ANSI 61 ✓
Gasket Temp Range−20°F to +180°F
Bolts & NutsHSLA steel per AWWA C-111
FinishFlexi-Coat® fusion-bonded epoxy per AWWA C213 ✓
CertificationsNSF/ANSI 61 & 372 ✓
Specialty Configurations
Style 914 — Reducing FCA & Style 921 — Top Bolt
Style 914 — Reducing Flanged Coupling Adapter
The 914 connects a plain-end pipe of one size to a flanged fitting of a different nominal size in a single unit — eliminating a pipe reducer plus a separate FCA. Common examples: 12" main to a 10" butterfly valve; 16" distribution main to a 12" pump suction flange; 8" transmission main to a 6" meter. Reductions of more than three nominal pipe sizes require special pricing.
Ordering is two-part: Coupling End Y (pipe OD range) + Flange End X (flange nominal size). Combine the two catalog codes and append -003 (standard Flexi-Coat finish, alloy bolts, NSF Buna-N gasket). Bolts, nuts, and gasket for the flange end are not supplied — provide separately to match the mating valve or fitting.
Pipe: All types
Coupling End OD: 3.44"–32.09"
Flange End: 3"–24" nominal
Working: 150 PSI
Restrained: No
Certifications: NSF 61 & 372
How to Build a 914 Catalog Number
Example: Connect 12" steel pipe (actual OD 12.63"–12.84") to an 8" flanged valve.
Step 1 — Coupling end OD range 12.63–12.84 → code 914-1275 (56 lbs)
Step 2 — 8" flanged end → code 08 (26 lbs)
Step 3 — Combine and add finish suffix
Final catalog number: 914-127508-003 · Total ship weight: 82 lbs
Style 914 — Material Specifications
BodySteel ASTM A53 / A283 Gr. C, min 30,000 PSI yield
Flange (3"–5")ANSI 150 lb flat face
Flange (6" and above)AWWA C207 Class D ANSI 150 lb
Follower (3"–12")Ductile Iron ASTM A536
Follower (14" and above)Heavy rolled steel AISI C1020
GasketNitrile (Buna-N) — NSF/ANSI 61 ✓
FinishFlexi-Coat® fusion-bonded epoxy ✓
CertificationsNSF/ANSI 61 & 372 ✓
Flange-end boltsNot included — supply separately
Style 921 — Top Bolt® Flanged Coupling Adapter
The 921 is Smith-Blair’s most installation-friendly standard FCA. Patents 8,528,945 / 8,776,351 / 8,789,832. Three features set it apart from every other style in this catalog: a removable inner gasket (the only FCA where you can pull and replace the gasket without removing the adapter from the pipe), wide OD range per unit (one catalog number covers two sub-ranges spanning multiple pipe types), and a top-bolt design that allows full installation without 360° access — critical in valve vaults and confined trenches. Also the broadest pipe material compatibility of any Smith-Blair FCA: DI, steel, PVC, copper, asbestos cement, and HDPE (with pipe stiffeners). Available in metric sizes (prefix 421-) 50mm through 300mm.
Pipe: Ductile Iron
Pipe: Steel
Pipe: PVC
Pipe: Copper
Pipe: Asbestos Cement
Pipe: HDPE (w/ stiffeners)
Sizes: 2"–12"
Working: 175 PSI
Restrained: No
Metric: 50mm–300mm available
Style 921 — Material Specifications
SleeveCarbon Steel
RingCarbon Steel
Flange (3"–12")AWWA C207 Class D ANSI 150 lb
Flange (2")Standard meter coupling flange
GasketNitrile (Buna-N) NSF/ANSI 61 ✓ — removable/replaceable
Gasket orientationBi-directional — inserts either way ✓
Bolts304 Stainless Steel with Flexi-Coat® finish ✓
NutsHeavy hex 304 SS, fluoropolymer-coated ✓
FinishFlexi-Coat® 12–15 mils ✓
Metric sizesAvailable (prefix 421-) ✓
Side-by-Side Reference
Complete Style Comparison
Every relevant specification across all seven Smith-Blair FCA styles. Use this table to confirm your selection and for submittal preparation.
| Feature | 911 | 912 | 913 | 914 | 920 | 921 | 923 |
|---|---|---|---|---|---|---|---|
| Full Name | FlangeLock Restrained — DI & Steel | Cast DI FCA (OMNI) | Fabricated Steel FCA | Reducing FCA | FlangeLock Restrained — PVC | Top Bolt FCA | MJ Coupling Body Only |
| Restrained? | Yes — Cam-Lock integral | No (anchor studs optional) | No (anchor studs optional) | No | Yes — Cam-Lock integral | No | Body only; add MJ restraint gland |
| Pipe — Ductile Iron | ✓ Primary | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Pipe — Steel | ✓ (3"–12" only) | ✓ | ✓ Primary | ✓ All types | — | ✓ | ✓ |
| Pipe — PVC | — use 920 | ✓ | ✓ | ✓ All types | ✓ Primary | ✓ | ✓ |
| Pipe — Cast Iron | — | ✓ | ✓ | ✓ | — | ✓ | — |
| Pipe — Copper / HDPE | — | — | — | — | — | ✓ (HDPE w/ stiffener) | — |
| Pipe — Asbestos Cement | — | ✓ gray follower | ✓ | ✓ | — | ✓ | — |
| Body Material | Fabricated steel | Cast DI ASTM A536 | Fabricated steel | Fabricated steel | Fabricated steel | Carbon steel | Fabricated steel |
| Nominal Size Range | 3"–48" | 3"–12" | 3"–24" | OD 3.44"–32" | 3"–36" | 2"–12" | 3"–48" |
| Max Working Pressure | 150 PSI std · 300 PSI option (DI ≤16") · 250 PSI (DI 18"+) | 250 PSI | 150 PSI | 150 PSI | 175 PSI (3"–12") · 150 PSI (14"–30") | 175 PSI | 250 PSI (PVC 4"–24") · 150 PSI (30") · 125 PSI (36" PVC) |
| Reducing Style? | ✓ Available | No | No | ✓ Purpose-built | No | No | No |
| Gasket Type | SBR MJ · AWWA C111 | Nitrile Buna-N NSF 61 · OMNI compatible | Nitrile Buna-N NSF 61 | Nitrile Buna-N NSF 61 | SBR MJ · AWWA C111 | Nitrile Buna-N NSF 61 · Removable/replaceable | SBR MJ (supplied separately) |
| Ships Complete? | ✓ (gasket + T-bolts) | ✓ (includes flange bolts) | ✓ | Partial (no flange-end bolts) | ✓ (gasket + T-bolts) | ✓ | Body only — add gland, gasket, T-bolts |
| NSF 61/372 | Not listed on datasheet | ✓ NSF 61 (gasket) | ✓ NSF 61 & 372 | ✓ NSF 61 & 372 | Not listed on datasheet | ✓ NSF 61 (gasket) | Not listed on datasheet |
| AWWA Standards | C207, C111, C213 | C219, C111 | C219, C111, C213 | C219, C111 | C207, C111, C213 | C207 | C207, C111 |
| Standout Feature | 300 PSI option; patented Cam-Lock; reducing available | Only cast DI body; OMNI gasket; color-coded follower | Largest non-restrained size range; covers 5" and 14"–24" | Connects mismatched nominal sizes; two-part ordering | PVC-specific bite geometry; dual OD range catalog option | Removable gasket; top-bolt; broadest pipe material list | Pipe pass-through; combines with any spec’d MJ restraint |
Selection by Pipe Material
Which FCA Goes on Which Pipe?
Pipe material is the first filter. Use the guides below to narrow from seven styles to two or three, then apply your restraint requirement to make the final call.
Ductile Iron Pipe — All 7 Styles Compatible
Need restraint, no thrust block: Style 911
Large diameter with restraint: Style 923 + MJ gland
Thrust block provided, 3"–12": Style 912 or 921
Thrust block provided, 14"–24": Style 913
Tight vault, gasket may need replacement: Style 921
Connecting to smaller flange: Style 914
Large diameter with restraint: Style 923 + MJ gland
Thrust block provided, 3"–12": Style 912 or 921
Thrust block provided, 14"–24": Style 913
Tight vault, gasket may need replacement: Style 921
Connecting to smaller flange: Style 914
Steel Pipe — 5 of 7 Styles Compatible
Need restraint, 3"–12": Style 911
Need restraint, 14"+: Style 923 + MJ gland
Thrust block provided, 3"–12": Style 912, 913, or 921
Thrust block provided, 14"–24": Style 913
Reducing connection: Style 914
⚠ 911 on steel is limited to 3"–12" and 250 PSI max. For steel 14"+, use 923.
Need restraint, 14"+: Style 923 + MJ gland
Thrust block provided, 3"–12": Style 912, 913, or 921
Thrust block provided, 14"–24": Style 913
Reducing connection: Style 914
⚠ 911 on steel is limited to 3"–12" and 250 PSI max. For steel 14"+, use 923.
PVC Pipe (C-900 / C-905) — Requires PVC-Specific OD Ranges
Need restraint, 3"–36": Style 920 (not 911)
Need restraint, large diameter: Style 923 + MJ gland
Thrust block provided, 3"–12": Style 912, 913, or 921
Thrust block provided, 14"–24": Style 913
Wide OD range, field gasket replace: Style 921
C-900 and C-905 have different ODs at the same nominal size — always measure actual OD before ordering.
Need restraint, large diameter: Style 923 + MJ gland
Thrust block provided, 3"–12": Style 912, 913, or 921
Thrust block provided, 14"–24": Style 913
Wide OD range, field gasket replace: Style 921
C-900 and C-905 have different ODs at the same nominal size — always measure actual OD before ordering.
Never use Style 911 on PVC
Other Materials
Cast iron, all sizes: Style 912 or 913
Asbestos cement: Style 912 (gray follower), 913, or 921
Copper tubing: Style 921 only
HDPE: Style 921 only (with pipe stiffeners)
Any reducing connection: Style 914
Asbestos cement: Style 912 (gray follower), 913, or 921
Copper tubing: Style 921 only
HDPE: Style 921 only (with pipe stiffeners)
Any reducing connection: Style 914
Reference Data from Smith-Blair Datasheets
Dimensional Data & Catalog Numbers
Key dimensional data for the three most-ordered styles. Always verify pipe OD against catalog OD ranges before placing an order. Call 281.664.8000 with pipe OD, pipe material, and flange size for a confirmed catalog number and same-day quote.
Style 911 — FlangeLock DI/Steel Dimensional Data
| Nom. Size | O.D. Range (in) | Catalog Number | Wt (lbs) | Dim A | Dim B | Dim C | Dim D | E — Min Insert | Max Deflection |
|---|---|---|---|---|---|---|---|---|---|
| 3" | 3.96 | 911-03960300-000 | 25 | 9.82 | 7.50 | 4.62 | 7.88 | 3.00 | 3° |
| 4" | 4.80 | 911-04800400-000 | 35 | 10.67 | 9.00 | 5.00 | 7.88 | 3.00 | 5° |
| 6" | 6.90 | 911-06900600-000 | 49 | 11.19 | 11.00 | 7.03 | 7.88 | 3.00 | 5° |
| 8" | 9.05 | 911-09050800-000 | 62 | 13.29 | 13.50 | 9.25 | 7.88 | 3.00 | 5° |
| 10" | 11.10 | 911-11101000-000 | 85 | 16.97 | 16.00 | 11.25 | 7.88 | 3.00 | 5° |
| 12" | 13.20 | 911-13201200-000 | 112 | 19.07 | 19.00 | 13.38 | 7.88 | 3.00 | 5° |
| 14" | 15.30 | 911-15301400-000 | 134 | 21.18 | 21.00 | 15.50 | 8.13 | 3.00 | 2° |
| 16" | 17.40 | 911-17401600-000 | 163 | 23.28 | 23.50 | 17.59 | 8.13 | 3.00 | 2° |
| 18" | 19.50 | 911-19501800-000 | 176 | 25.98 | 25.00 | 19.69 | 8.13 | 3.00 | 1.5° |
| 20" | 21.60 | 911-21602000-000 | 206 | 28.08 | 27.50 | 21.78 | 8.13 | 3.00 | 1.5° |
| 24" | 25.80 | 911-25802400-000 | 264 | 32.28 | 32.00 | 26.00 | 8.13 | 3.00 | 1° |
| 30" | 32.00 | 911-32003000-000 | 563 | 39.42 | 38.75 | 32.20 | 11.50 | 3.00 | 1° |
| 36" | 38.30 | 911-38303600-000 | 749 | 46.29 | 46.00 | 38.50 | 13.50 | 3.00 | 1° |
| 42" | 44.50 | 911-44504200-000 | 1,091 | 53.62 | 53.00 | 44.70 | 13.50 | 3.00 | 1° |
| 48" | 50.80 | 911-50804800-000 | 1,272 | 60.50 | 59.50 | 51.00 | 13.50 | 3.00 | 1° |
Style 921 — Top Bolt FCA Dimensional Data
| Nom. Size | Overall OD Range (in) | Catalog Number | Flange Dia. (in) | Laying Length (in) | Min. Pipe Insert (in) | Wt Boxed (lbs) |
|---|---|---|---|---|---|---|
| 2" | 2.13–2.95 | 921-02950200-031 | 6.00 | 6.81 | 2.88 | 8 |
| 3" | 3.10–4.20 | 921-04200300-031 | 7.50 | 5.38 | 3.38 | 12 |
| 4" | 4.46–5.60 | 921-05600400-031 | 9.00 | 5.50 | 3.50 | 17 |
| 6" | 6.56–7.60 | 921-07600600-031 | 11.00 | 6.56 | 3.50 | 23 |
| 8" | 8.54–9.85 | 921-09850800-031 | 13.50 | 6.56 | 3.50 | 30 |
| 10" | 10.64–11.83 | 921-11831000-031 | 16.00 | 6.56 | 3.50 | 37 |
| 12" | 12.62–13.67 | 921-13671200-031 | 19.00 | 6.69 | 3.50 | 50 |
Style 923 — MJ Coupling Body Dimensional Data (14"–48")
| Nom. Size | O.D. Range (in) | Catalog Number | Wt (lbs) | Dim C | Dim D | E — Min Insert (in) |
|---|---|---|---|---|---|---|
| 14" | 15.30 | 923-00001400-000 | 80 | 15.50 | 7.88 | 3.00 |
| 16" | 17.40 | 923-00001600-000 | 97 | 17.59 | 7.88 | 3.00 |
| 18" | 19.50 | 923-00001800-000 | 104 | 19.69 | 7.88 | 3.00 |
| 20" | 21.60 | 923-00002000-000 | 122 | 21.78 | 7.88 | 3.00 |
| 24" | 25.80 | 923-00002400-000 | 157 | 26.00 | 7.88 | 3.00 |
| 30" | 32.00 | 923-00003000-000 | 275 | 32.20 | 11.33 | 3.00 |
| 36" | 38.30 | 923-00003600-000 | 383 | 38.50 | 11.33 | 3.00 |
| 42" | 44.50 | 923-00004200-000 | 506 | 44.70 | 11.33 | 3.00 |
| 48" | 50.80 | 923-00004800-000 | 593 | 51.00 | 11.33 | 3.00 |
All dimensions in inches. Other sizes and custom sleeve lengths available — contact us. Minimum pipe insertion (E) measured from flange face.
Technical FAQ
Common Questions
Do I need a restrained FCA or can I use a standard one?
If your design includes a concrete thrust block, tie-rod system, or fully restrained pipeline capable of handling calculated thrust at operating pressure, a standard non-restrained FCA (912, 913, or 921) is appropriate and lowest cost. If thrust blocking is impractical, prohibited by specification, or the connection is in a trenchless bore or tight vault, use a restrained FCA — Style 911 for DI/steel, Style 920 for PVC. When in doubt, calculate the thrust force at your design pressure and compare blocking cost vs. restrained adapter cost.
Can I use Style 911 on PVC pipe?
No. The 911 wedge is heat-treated for ductile iron pipe hardness. PVC is significantly softer — the 911 wedge geometry will not grip PVC correctly and may cut into or crush the pipe wall. For PVC, specify Style 920, which is engineered with PVC-appropriate bite geometry and OD ranges matched to C-900 and C-905 PVC. This is the single most common substitution error on Smith-Blair FCA orders.
What is a breakaway nut and how do I know the Cam-Lock has engaged?
A breakaway nut is a torque-indicating fastener. When you reach the specified torque — 45–60 ft·lbs on Style 911, 40–60 ft·lbs on Style 920 — the nut shears cleanly at a scored section. The snap and exposed stub confirm the wedge has reached full engagement depth in the pipe OD. Do not attempt to re-torque after breakaway — engagement is set. If a nut breaks before reaching minimum torque, the wedge may not be properly seated; contact Smith-Blair engineering before pressurizing the line.
What does the OMNI gasket system on Style 912 mean for ordering?
The OMNI system means the 912 body is universal for the nominal size — you select the correct follower flange by pipe type (blue = DI OD, red = IPS OD, gray = AC OD) and the OMNI coupling gasket by actual pipe OD range. If your utility already stocks OMNI coupling gaskets, those same gaskets work in the 912 without maintaining a separate FCA gasket inventory. One 912 body handles ductile iron, cast iron, IPS steel, and asbestos cement — only the follower and gasket swap out.
How do I build a Style 914 reducing FCA catalog number?
You need two pieces of information: (1) actual measured pipe OD at the coupling end, and (2) nominal flange size at the flanged end. Locate your pipe OD in the “Coupling End Y” table to get the first catalog code. Locate your flange nominal size in the “Flange End X” table for the second code. Combine both and append -003 for standard Flexi-Coat finish, alloy bolts, and NSF Buna-N gasket. Example: 12" steel pipe to 8" valve = 914-127508-003. Note: bolts, nuts, and gasket for the flanged end are not supplied — provide those separately to match the mating valve or fitting.
When should I specify 300 lb flange drilling instead of standard 150 lb?
Standard Smith-Blair FCAs ship with AWWA C207 Class D ANSI 150 lb drilling. Specify 300 lb when your system pressure exceeds 150 PSI and the connected valve or fitting has 300 lb drilling. On Style 911, the 300 lb option is available for ductile iron pipe through 16" only, rated to 300 PSI. This must be specified at time of order — flange drilling cannot be modified in the field. For all other styles and sizes beyond 16", 150 lb is the only available option; contact Smith-Blair engineering for exceptions.
What is Flexi-Coat and is it safe for potable water?
Flexi-Coat® is Smith-Blair’s proprietary fusion-bonded epoxy finish applied per AWWA C213 at 12–15 mils thickness. It is factory-applied at high temperature — not field paint. The Nitrile (Buna-N) gaskets on Styles 912, 913, 914, and 921 are independently certified to NSF/ANSI 61 for potable water contact. For NSF 61 compliance documentation on the coating itself, or for full project submittals, contact sales@watermainsupply.com and we will coordinate with Smith-Blair’s technical team.
What is the pass-through feature on Style 923?
The Style 923 body bore is large enough for the pipe to pass completely through it before assembly. This means you slide the body down the pipe to a convenient position, drop the MJ restraint gland and gasket into place, then advance the body back to the joint — no threading from the pipe end. On large-diameter pipe where weight and alignment are difficult to manage, this dramatically simplifies installation. Note: the pass-through feature is not available when raised-face flanges are specified.
What makes the Style 921 Top Bolt different from the 912 or 913?
Three things. First, the removable inner gasket — the 921 is the only Smith-Blair FCA where you can pull and replace the channeled inner gasket without removing the adapter from the pipe. Second, the top-bolt design means all bolts are accessible from one side, so you don’t need 360° access around the adapter during installation — critical in valve vaults and tight trenches. Third, the 921 covers the broadest range of pipe materials: DI, steel, PVC, copper, asbestos cement, and HDPE with pipe stiffeners. The tradeoff: sizes only go up to 12", and it is non-restrained.
Can I get project submittals, shop drawings, or material certifications?
Yes. As an authorized Smith-Blair distributor, Watermain Supply coordinates directly with Smith-Blair’s technical team for project submittals, shop drawings, material mill certifications, NSF 61 compliance documentation, and engineer-of-record submittals. Send your project specifications and contact information to sales@watermainsupply.com and we will coordinate the full submittal package.
Need an FCA Quoted or Submitted?
Send us pipe OD, pipe material, nominal flange size, system pressure, and whether you need restraint. We confirm the style and catalog number same day and coordinate submittals directly with Smith-Blair engineering.
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