Menu
Your cart is empty
Looks like you haven't added anything to your cart yet
Dresser Gas Pipe Couplings, Fittings and Gaskets
Dresser Style 721 Transition Fitting - Steel to PE SDR 11 Gas Main
Dresser
Dresser Style 721 Transition Fitting - Steel to PE SDR 11 Gas Main
- Price
- From $746.57
Dresser Style 711 Seal and Restraint Bolted Coupling - Steel or PE Gas Pipe
Dresser
Dresser Style 711 Seal and Restraint Bolted Coupling - Steel or PE Gas Pipe
- Price
- From $264.44
Dresser Gas Service Fitting - Style 90 Gas
Dresser
Dresser Gas Service Fitting - Style 90 Gas
- Price
- From $72.49
Dresser Gas Main Long Coupling - Style 40 Gas Series
Dresser
Dresser Gas Main Long Coupling - Style 40 Gas Series
- Price
- From $140.58
Dresser Gas Main Line Cap - Style 31 Gas Series
Dresser
Dresser Gas Main Line Cap - Style 31 Gas Series
- Price
- From $753.14
Dresser Gas Main Insulating Coupling - Style 39 Gas Series
Dresser
Dresser Gas Main Insulating Coupling - Style 39 Gas Series
- Price
- From $334.95
Dresser Gas Main Coupling - Style 38 Gas Series
Dresser
Dresser Gas Main Coupling - Style 38 Gas Series
- Price
- From $125.46
Dresser Style 440 Joint Harness - Coupled Steel Pipe Joint Restraint
Dresser
Dresser Style 440 Joint Harness - Coupled Steel Pipe Joint Restraint
- Price
- From $371.37
Dresser Replacement Gaskets and Style 90 Pipe End Insulators
Dresser
Dresser Replacement Gaskets and Style 90 Pipe End Insulators
- Price
- From $15.58
Dresser Casing Bushing - Carrier Pipe in Casing, 3.50 in to 8.625 in OD
Dresser
Dresser Casing Bushing - Carrier Pipe in Casing, 3.50 in to 8.625 in OD
- Price
- From $1,169.47
Dresser Style 88 Service Head Adapter - Steel to CTS PE Gas
Dresser
Dresser Style 88 Service Head Adapter - Steel to CTS PE Gas
- Price
- From $78.95
Dresser STAB-40 Long Coupling - Steel Gas Pipe, 2 in to 12 in
Dresser
Dresser STAB-40 Long Coupling - Steel Gas Pipe, 2 in to 12 in
- Price
- From $287.35
Dresser Gas Pipe Couplings, Fittings and Gaskets
Dresser · Gas Pipe Joining
Dresser Gas Couplings, Fittings and Gaskets
Seal and restraint couplings, transition fittings and service fittings for steel, polyethylene and cast iron gas pipe.
1-1/4 to 12 inStyle 711 sizes
300 PSI711 max, 3 to 6 in
ASTM F1948Category 1
125 PSIG401 and 501 service fittings
This collection covers Dresser fittings that join gas pipe: Style 711 and Style 700 seal and restraint couplings, Style 721 steel to PE transition fittings, Style 401, 501 and 502 service fittings, PE insert stiffeners, Style 701 bayonet couplers and Grade 27 armored pinned gaskets. They serve gas distribution crews and contractors joining, transitioning and capping steel, PE and cast iron mains and services.
We supply the full Dresser part number range and check pipe OD, material and SDR before we quote. Call 1-888.510.4036 or email sales@watermainsupply.com. Genuine Dresser equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Will It Work for Your Job?
Pressure
Style 711 couplings seal to 150 PSI at 1-1/4, 2, 8, 10 and 12 in and to 300 PSI at 3 to 6 in. Cast iron transition products are rated 60 PSI. Service fittings run to 125 psig.
Restraint
Style 711 and 721 grip the pipe against pullout and meet DOT 192.281(e). Anchor any joint where forces other than line pressure could pull it apart.
Fit
Polyethylene needs the matching color-coded insert stiffener for its SDR. Measure steel OD and confirm PE SDR before ordering.
Size It With Us
Send the pipe OD, pipe material and line content. We confirm the part number before you order. 1-888.510.4036 · sales@watermainsupply.com
Product Lines
Pick by what you are joining: steel and PE mains, a steel to PE transition, or a service line.
Style 711 Coupling
Steel or PE Gas Pipe
Sizes1-1/4 to 12 in
Pressure150 to 300 PSI
PipeSteel, PE
StdASTM F1948
Assembled seal and restraint coupling: compression seal on each end and a grip ring that locks the pipe.
- Insulating, reducing, line cap and cast iron builds
- Stab installation
Best for Joining and repairing steel and PE gas mains
View Style 711 Coupling
Style 721 Transition
Steel to PE SDR 11 Gas Main
Sizes3 to 12 in
EndsSteel x PE SDR 11
PE2708 or 4710
StdASTM F1973
Monolithic steel to PE transition with the 711 grip profile and full ASTM F2897 traceability.
- No extra pressure parts to trace
- Heat code stamped on the fitting
Best for Steel to PE main transitions
View Style 721 Transition
Style 501 Service Fitting
CTS PE Gas
Sizes5/8 to 1-3/8 in CTS
Pressure125 psig
EndsSteel x PE
TypesTee, ell, coupling
Compression transition fittings, tap-n-valve tees and street ells for steel to CTS PE services.
- Long shield nut options
- 0.090 and 0.099 in PE wall
Best for Gas service connections
View Style 501 Service Fitting
Compare the Line
| Listing | Sizes | Rating (Dresser) | Pipe | Best for |
|---|---|---|---|---|
| Style 711 Coupling | 1-1/4 to 12 in | 150 to 300 PSI | Steel, PE | Main joints |
| Style 711 Insulating | 2 to 12 in | 150 to 300 PSI | Steel, PE | CP isolation |
| Style 711 Reducing | 2 x 1-1/4 to 12 x 10 in | Per label | Steel, PE | Size changes |
| Style 711 CI Insulating Reducing | 3.80 to 13.20 in CI | 60 PSI | Cast iron to steel or PE | CI tie-ins |
| Style 711 Line Cap | 2 to 12 in | 150 PSI | Steel, PE | Capping mains |
| Style 721 Transition | 3 to 12 in | ASTM F1973 Cat 1 | Steel x PE SDR 11 | Transitions |
| Style 401 Seal-Plus | 1/2 to 1-1/4 in CTS | 125 psig | PE | PE services |
| Style 501 | 5/8 to 1-3/8 in | 125 psig | Steel x PE | Service tees |
| Grade 27 Pinned Gasket | 2 to 20 in | Per coupling | Steel | Gasket replacement |
Quick rule: Joining mains, use Style 711. Changing steel to PE on a main, use Style 721. On a service line, use Style 401 for PE to PE and Style 501 for steel to PE.
Dresser vs Other Brands We Carry
| Need | Dresser | Smith-Blair (also on our site) | Verdict |
|---|---|---|---|
| Steel pipe coupling | Style 711: seal and restraint | Style 411: steel coupling, 1/2 to 48 in | Smith-Blair 411 covers far larger sizes; Dresser 711 adds pullout restraint and PE capability for gas |
| Insulating joint | Style 711 Insulating | Style 416: steel insulating coupling, 2 to 24 in | Smith-Blair 416 reaches 24 in; Dresser 711 restrains the pipe as well |
Smith-Blair builds for water and industrial service first; for restrained gas joints on PE, the Dresser 711 family is the closer fit.
Selection Guide
| Application | Pipe | Recommended | Notes |
|---|---|---|---|
| Joint or repair on a main | Steel or PE | Style 711 Coupling | Add insert stiffener for PE |
| Cathodic protection break | Steel | Style 711 Insulating | Insulators included |
| Cast iron to steel or PE | Cast iron | Style 711 CI Insulating Reducing | 60 PSI |
| End of a main | Steel or PE | Style 711 Line Cap | 150 PSI |
| Main transition | Steel x PE SDR 11 | Style 721 | 3 to 12 in |
| Service line | CTS PE | Style 401 or 501 | 125 psig |
Sizing and Best Practices
Measure the pipe
Read steel OD with a pi tape. For PE, read the SDR from the pipe print line and order the matching insert stiffener.
Restrain the joint
Style 711 grips against pullout from line pressure. Where soil movement or thrust could act on the joint, anchor it as Dresser requires.
Insulating joints
Use insulating builds where a cathodically protected section meets an unprotected one, and keep insulating parts clean during assembly.
Need help? Send the pipe OD and material to sales@watermainsupply.com and we confirm the Dresser part number.
Why Engineers Specify It
Seal and Restraint
Compression seal plus a metallic grip ring in one assembled coupling.
Category 1
Style 711 meets DOT 192.281(e) and ASTM F1948 Category 1.
Color-Coded Stiffeners
PE insert stiffeners are coded by SDR for quick, correct selection.
Monolithic 721 Body
No extra pressure parts to qualify or trace on the transition.
Insulating Options
PPO and PP insulators isolate CP sections at the joint.
Part Number Ordering
Every variant ends with the Dresser part number.
Related Dresser Products
Insert Stiffener
PE Gas Pipe, for Style 711 and 700View
Style 711 Line Cap Insert
PE Gas PipeView
LS-2 Weld Hot Tap Fitting
Class 150, 285 PSI GasView
Style 175 Meter and Curb Valve
Compression Ends, GasViewGenuine Dresser parts, listed by Dresser part number.
Why Buy From Watermain Supply
Engineering-Led Selection
We check pipe OD, material and line content against Dresser data before we quote.
Multi-Brand Honesty
We carry Dresser and Smith-Blair. If one is not the right fit for your job, we say so.
Order by Part Number
Every variant ends with the Dresser part number, so you get exactly what the spec calls for.
Account Terms
Net terms for contractors, utilities and municipalities on approved accounts.
Data Sheets on Every Listing
Dresser technical specifications and installation instructions are attached to each product.
Gulf Coast Service
Houston-based team for the Gulf Coast and nationwide shipping.
Frequently Asked Questions
What warranty comes with Dresser gas fittings?
12 months from the date of purchase under Dresser published warranty terms.
Do I need an insert stiffener on PE pipe?
Yes. Style 711 and 700 couplings need the insert stiffener that matches the PE pipe SDR. They are color-coded and sold separately.
What pressure is the Style 711 rated for?
150 PSI at 1-1/4, 2, 8, 10 and 12 in, and 300 PSI at 3 to 6 in. Cast iron products are rated 60 PSI.
Does Style 711 restrain the pipe?
Yes. A grip ring locks the pipe against pullout from line pressure. Anchor the joint where other forces could act on it.
Can Style 721 join medium density PE?
Yes. It comes for SDR 11 PE 2708 medium density and PE 4710 high density.
How do I order the right part?
Every variant ends with the Dresser part number. Send us the pipe OD, material and SDR and we confirm it.
Are these for water service?
This collection is gas service products. See our Dresser water collections for water mains.
Can I get a factory submittal?
Yes. Email sales@watermainsupply.com with the part numbers.
Ready to Size Your Gas Joint?
Send the pipe OD, material and line content. We confirm the Dresser part number and quote the same day.
Technical data on this page is taken from Dresser product literature and is subject to change by the manufacturer. Confirm against the current installation manual before specifying. Dresser, Style 711, Style 721 are trademarks of Dresser, LLC, used here for product identification only. Watermain Supply is a DBA of E4 Industrial LLC, an independent industrial supplier based in Houston, Texas.
- Choosing a selection results in a full page refresh.