Dresser Style 91 Service Saddle product photo

Dresser Style 91 Gas Service Saddles: Steel and Cast Iron Pipe

The Dresser Style 91 makes natural gas service taps on steel and cast iron mains. Double Dresserloy straps, a gas-compound gasket cemented in place, and 1/2 to 2 in NPT outlets, in conductive or insulating finish. Measure the main OD, pick the tap size and order by Dresser part number. For water service taps, see the Dresser T3 saddle.

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Dresser Style 91 Service Saddle - Steel Pipe
Dresser Style 91 double-strap service saddle for steel pipe

Dresser

Free Shipping $499 or more

Dresser Style 91 Service Saddle - Steel Pipe

From $168.25
Dresser Style 91 Service Saddle - Cast Iron Pipe
Dresser Style 91 double-strap service saddle for cast iron pipe

Dresser

Free Shipping $499 or more

Dresser Style 91 Service Saddle - Cast Iron Pipe

From $225.12

Dresser Style 91 Gas Service Saddles: Steel and Cast Iron Pipe

Dresser · Gas Service Saddles

Dresser Style 91 Service Saddles

Double strap service saddles for natural gas service taps on steel and cast iron mains, 1/2 to 2 in NPT outlets, conductive or insulating. 150 psig seal only.

Dresser Style 91 service saddle for steel pipe
150 psigSeal only
1/2 to 2 inNPT tap sizes
2.25 to 13.50 inSteel pipe OD
3.56 to 9.54 inCast iron pipe OD

The Dresser Style 91 service saddle makes a natural gas service connection on a steel or cast iron main quickly. High-strength Dresserloy straps are shaped to the pipe with an extra-wide bearing surface that will not cut or crush it, and the gasket, a Dresser compound made for natural gas, is cemented in place in a ductile iron body. Every build listed here is double strap. Choose the conductive E-coat finish where the service must stay electrically continuous, or the insulating AL-CLAD plastisol finish to break cathodic protection at the tap.

The range of fit is marked on each saddle body. Every variant ends with the Dresser part number. 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

Dresser lists the Style 91 at 150 psig, seal only, in its gas product selection guide. The allowable pressure on a job also depends on the pipe, its condition and the workmanship.

Service

The Style 91 is a gas service saddle: its gasket compound is made for natural gas. For water service taps, see the Dresser T3 wide range saddle.

Fit

Order by pipe material and measured OD range, then the NPT tap size from 1/2 to 2 in.

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 pipe material, then OD range and tap size.

Style 91, Steel Pipe

Style 91, Steel Pipe

Steel Pipe

OD2.25 to 13.50 in
Tap1/2 to 2 in NPT
Rating150 psig
StrapsDouble, Dresserloy

Service saddle for steel gas mains from 2 to 12 in nominal, in conductive or insulating finish.

  • Gasket cemented in place
  • Range of fit marked on the body
Best for Gas service taps on steel mains
View Style 91, Steel Pipe
Style 91, Cast Iron Pipe

Style 91, Cast Iron Pipe

Cast Iron Pipe

OD3.56 to 9.54 in
Tap1/2 to 2 in NPT
Rating150 psig
StrapsDouble, Dresserloy

The same saddle sized to cast iron ODs, 3 to 8 in nominal.

  • Wide bearing surface
  • Conductive or insulating
Best for Gas service taps on cast iron mains
View Style 91, Cast Iron Pipe
Style 501 Tap-N-Valve

Style 501 Tap-N-Valve

CTS PE Gas

UseService tee
PairsWith Style 91
PipeSteel x PE
Rating125 psig

Dresser pairs the Style 91 with the Style 501 Tap-N-Valve tee to make the service connection.

  • Retains the cut slug
  • Metal-to-metal shut-off seat
Best for Completing the gas service
View Style 501 Tap-N-Valve

Compare the Line

Listing Pipe OD Tap sizes Rating (Dresser) Finish
Style 91, Steel Pipe 2.25 to 13.50 in 1/2 to 2 in NPT 150 psig, seal only Conductive or insulating
Style 91, Cast Iron Pipe 3.56 to 9.54 in 1/2 to 2 in NPT 150 psig, seal only Conductive or insulating
T3 Wide Range Saddle (water) 2 to 48 in 1/2 to 2 in NPT or CC To 250 PSI 304 stainless band
Quick rule: Gas service on a steel main, use the Style 91 steel saddle. Gas service on cast iron, use the Style 91 cast iron saddle. Water service on any main, use the T3.

Dresser vs Other Brands We Carry

The Smith-Blair service saddles we list are built for water service, so they are not a like-for-like alternative to the Style 91 on gas. For water taps, compare the Dresser T3 with Smith-Blair 31x and 37x saddles on the water saddle collection page.

Selection Guide

Job Pipe Recommended
Gas service tap Steel, 2 to 12 in Style 91, steel
Gas service tap Cast iron, 3 to 8 in Style 91, cast iron
Break cathodic protection at the tap Steel or cast iron Style 91, insulating finish
Keep the service electrically continuous Steel or cast iron Style 91, conductive finish
Water service tap Any common main T3 wide range saddle

Sizing and Best Practices

Measure the OD

Use a pi tape on the main at the tap location and pick the OD range that covers it. The range is also marked on the saddle body.

Pick the tap size

Choose the NPT outlet size, 1/2 to 2 in, to match the service tee or valve.

Choose the finish

Conductive E-coat keeps the service on the main's cathodic protection; insulating AL-CLAD plastisol isolates it.

Tapping

The main is tapped through the saddle after installation, by others, under your operator procedures.

Need help? Send the pipe OD and material to sales@watermainsupply.com and we confirm the Dresser part number.

Why Engineers Specify It

Wide Bearing Straps

Shaped to the pipe so they will not cut or crush it.

Gas Gasket

Dresser natural gas compound, cemented in place.

Double Strap

On every build listed.

Conductive or Insulating

E-coat or AL-CLAD plastisol.

Fit Marked

Range of fit cast on each body.

Part Number Ordering

Every variant ends with the Dresser part number.

Related Dresser Products

Dresser Style 501 Compression Fitting - CTS PE Gas

Style 501 Compression Fitting

CTS PE GasViewDresser Style 711 Seal and Restraint Bolted Coupling - Steel or PE Gas Pipe

Style 711 Seal and Restraint Bolted Coupling

Steel or PE Gas PipeViewDresser Style 175 Meter and Curb Valve - Compression Ends, Gas

Style 175 Meter and Curb Valve

Compression Ends, GasViewDresser T3 Wide Range Service Saddle - 304 Stainless

T3 Wide Range Service Saddle

304 StainlessView

Genuine 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 is the Dresser Style 91 service saddle used for?

Making natural gas service taps on steel and cast iron mains.

What pressure is the Style 91 rated for?

Dresser lists it at 150 psig, seal only.

Can I use the Style 91 for water service?

It is built for gas: its gasket is a Dresser compound for natural gas. For water service, use the Dresser T3 wide range saddle.

What tap sizes are available?

1/2, 3/4, 1, 1-1/4, 1-1/2 and 2 in NPT.

What is the difference between the conductive and insulating builds?

The conductive E-coat build keeps the service electrically connected to the main. The insulating AL-CLAD plastisol build breaks the cathodic protection circuit at the tap.

How do I size a Style 91?

Measure the main OD with a pi tape and pick the OD range that covers it, then the tap size. The range is marked on the saddle body.

Does the saddle come with straps?

Yes. Every listed build is double strap, shipped with the body, cemented gasket, straps and nuts.

What fitting goes on the saddle?

Dresser pairs the Style 91 with the Style 501 Tap-N-Valve tee.

What warranty applies?

12 months from the date of purchase under Dresser published warranty terms.

Can I get a submittal?

Yes. Email sales@watermainsupply.com with the part numbers.

Ready to Size Your Service Saddle?

Send the pipe OD, material and line content. We confirm the Dresser part number and quote the same day.

1-888.510.4036Email SalesRequest a Quote
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, Dresserloy, AL-CLAD, Tap-N-Valve, T3 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.