Dresser Pipeline Repair Couplings

From 1/2" small-bore tubing to 24" transmission mains, Dresser Style 38, 40, 62, 138, and 139 couplings deliver leak-tight mechanical joints without welding, threading, or flanging

8 products
Sort by:
Best selling
Sort by:
Best selling
Availability
Type
Price
$0
$6,127.49
Dresser Style 38 Bolted Coupling
Style 138 Cast - Ductie Coupling Dresser

Dresser

Dresser Style 38 Bolted Coupling

From $87.93
Dresser Style 40 Long Bolted Coupling
Style 40 long bolted coupling

Dresser

Dresser Style 40 Long Bolted Coupling

From $139.31
Dresser Style 38 Coupling | Cast/Ductile Iron
Style 138 Cast - Ductie Coupling Dresser

Dresser

Dresser Style 38 Coupling | Cast/Ductile Iron

From $184.29
Dresser Style 40 Coupling | Cast/Ductile Iron
Style 40 long bolted coupling

Dresser

Dresser Style 40 Coupling | Cast/Ductile Iron

From $517.43
Dresser Style 138 Coupling | Cast/Ductile Iron
Style 138 Cast - Ductie Coupling Dresser

Dresser

Dresser Style 138 Coupling | Cast/Ductile Iron

From $552.19
Dresser Style 39 Insulating Coupling
Style 39 insulating and reducing coupling

Dresser

Dresser Style 39 Insulating Coupling

From $218.09
Dresser Style 62 Reducing Coupling
Style 62 reducing coupling

Dresser

Dresser Style 62 Reducing Coupling

From $486.16
Dresser Style 39 | Insulating & Reducing Coupling
Style 39 insulating and reducing coupling

Dresser

Dresser Style 39 | Insulating & Reducing Coupling

From $431.89
Dresser Pipeline Repair Couplings
Description

Dresser Pipe Couplings

From 1/2" small-bore tubing to 24" transmission mains, Dresser Style 38, 40, 62, 138, and 139 couplings deliver leak-tight mechanical joints without welding, threading, or flanging. Specify by pipe OD, material, gasket grade, and working pressure.

1/2"–24"
Size Range
8
Style Options
4
Gasket Grades
250 PSI
Max Working Pressure
Product Lines
Coupling Styles
Each style addresses a distinct joining scenario. Match your pipe OD, material, and operating conditions to the correct style before ordering.
38Most Specified
Style 38 — Regular Coupling
Standard-length bolted coupling for steel pipe. Available in 4", 5", 7", 12", and 16" lengths. Two or three bolt configurations depending on size. Fusion bonded epoxy OD coating standard.
Steel Pipe1/2"–24"Gr 27 / 42 / 365
40Extended Span
Style 40 — Long Coupling
Extended-length version of Style 38 for greater pipe end engagement. Ideal where pipe ends are out-of-round, corroded at the tip, or where additional pullout resistance is specified.
Steel Pipe1/2"–4"12" / 24" Body
38Cast/Ductile
Style 38 — Cast & Ductile Iron OD
Style 38 couplings manufactured to fit the larger, bell-shaped OD of cast and ductile iron pipe. Available from 3" to 24" nominal. Do not substitute steel-OD couplings on CI/DI pipe.
Cast IronDuctile Iron3"–24"
40Cast/Ductile
Style 40 Long — Cast & Ductile Iron OD
Long-body coupling sized for cast and ductile iron OD dimensions. Used where additional engagement length is needed on CI/DI mains or where the pipe condition warrants extra bite.
Cast IronDuctile IronExtended Body
138CI/DI Specialty
Style 138 — Cast/Ductile Iron Coupling
Purpose-built for cast and ductile iron pipe with the wide OD tolerance range characteristic of older CI mains. Epoxy ID/OD or RED-D Shopcoat finish. Sizes 3"–12".
Wide OD Tolerance3"–12"Epoxy / RED-D
39Insulating
Style 39 — Insulating & Reducing Coupling
Provides electrical isolation between dissimilar pipe materials or between cathodically protected and unprotected sections. Dielectric sleeve and gasket break the circuit at the joint.
Cathodic ProtectionElectrical IsolationDissimilar Metals
39Insulating
Style 39 — Insulating Coupling
Same-diameter insulating coupling for joining like-size pipe where electrical continuity must be broken. Used at meter sets, vault entries, and any CP system boundary.
CP System BoundariesMeter SetsVault Entry
62Reducing
Style 62 — Reducing Coupling
Transitions directly from cast/ductile iron OD pipe to steel pipe OD without an intermediate fitting. Eliminates a flange pair at tie-in points. Available 3"–24" nominal.
CI-to-Steel Transition3"–24"One-Piece
Engineering Reference
Coupling Selection Matrix
Use this matrix to quickly narrow your coupling type. All roads start with pipe material and OD.
Pipe Material Pipe OD Type Condition Recommended Style Notes
Steel Standard IPS OD Standard connection Style 38 Most common; specify length by installation gap
Steel Standard IPS OD Corroded pipe ends / out-of-round Style 40 (Long) Extra sleeve length improves engagement
Cast Iron CI OD (larger than steel) Standard connection Style 38 CI / Style 138 Must use CI-OD rated coupling — do not use steel-OD
Ductile Iron DI OD Standard connection Style 38 DI / Style 138 DI OD ≈ CI OD for same nominal size
Steel to CI/DI Mixed Transition joint Style 62 One coupling replaces sleeve + two gaskets at transition
Any Any Cathodic protection boundary Style 39 Insulating Verify isolation resistance after installation
Any Different sizes Reducing with isolation Style 39 I&R Combines size transition + electrical isolation
Technical Specifications
Working Pressure by Size
Dresser Style 38/40 working pressure decreases with pipe diameter. Always verify with the published pressure-size table for the specific coupling series.
Nominal Size Max WP (PSI) Bolt Size Torque (ft-lb)
1/2" – 2" 250 1/2" 40–45
2-1/2" – 4" 200 1/2" 40–50
5" – 6" 150 5/8" 60–75
8" – 10" 150 5/8" 75–90
12" – 16" 100 3/4" 90–100
18" – 24" 100 3/4" 100–120
Torque Sequence

Always tighten bolts alternately and in stages — never fully torque one bolt before moving to the next. Final torque in minimum three passes.

Gasket Grade Quick Reference
27
Buna-S Standard
Potable water, natural gas, most service applications. Standard grade shipped unless otherwise specified.
42
Buna-N / Nitrile
Oil-laden soils, petroleum products, hydrocarbon exposure. Specify where Grade 27 may swell.
365
Graphite Fiber High Temp
Steam, high-temperature process lines up to 1,200°F. RED-D Shopcoat housing required.
★
Armored Variants
Any grade available with stainless steel armor ring for rocky soils or vibration service. Suffix -013/-134/-081.
Compatibility
Pipe Material Compatibility
Steel and iron pipe share nominal sizes but not OD dimensions. Ordering the wrong OD series is the most common specification error on coupling orders.
Pipe Type 2" 4" 6" 8" 12"
Steel (IPS) OD 2.375" OD 4.500" OD 6.625" OD 8.625" OD 12.750"
Cast Iron OD 2.50" OD 4.80" OD 6.90" OD 9.05" OD 13.20"
Ductile Iron OD 2.50" OD 4.80" OD 6.90" OD 9.05" OD 13.20"
PVC C900 — OD 4.800" OD 6.900" OD 9.050" OD 13.200"
Critical Note

PVC C900 pipe is manufactured to cast iron OD dimensions — use CI-OD couplings, not IPS steel couplings, when tying into C900 mains.

Specification Guide
Choosing the Right Body Length
Body length affects pullout resistance, angular deflection allowance, and gap bridging. Choose based on field conditions — not just cost.
📏
Short Body (4"–5")
Use for routine pipe connections in good soil conditions with minimal angular deflection expected. Economical choice where pipe alignment is controlled.
Style 38 Standard
🔧
Medium Body (7"–12")
Preferred for older mains with variable OD tolerances, shallow installations with surface loading, or where thermal movement is anticipated.
Style 38 / 40
⚙️
Long Body (16"–24")
Specified for large-diameter transmission mains, high-pressure service, expansive soil areas, or where seismic deflection must be accommodated.
Style 38 Long / 40

Ready to Order or Need Technical Help?

Contact our team for availability, custom sizing, and volume pricing on Dresser Utility Solutions products.

Email sales@watermainsupply.com Call 281.664.8000