The Dresser Style 90 is a complete family of gas service fittings engineered for joining steel pipe on natural gas service lines from main to meter. Built on a time-proven compression sealing principle, every Style 90 fitting ships fully assembled and ready to install — no threading, welding, or special tools required. The boltless design uses threaded end nuts that compress resilient, cup-protected gaskets against the pipe to form a flexible, gas-tight seal rated at 150 PSI standard.
Style 90 fittings are available in cast iron and steel bodies, in 5" and 10" middle ring lengths, with a full range of configurations: straight couplings, reducing couplings, 45° and 90° ells, street ells, tees, riser tees, male adapters, line caps, and the Tap-N-Valve® tee for service connection taps. Insulating versions are available throughout the line for cathodic protection applications — including full-sleeve insulating couplings, insulating reducing couplings, insulating ells, and insulating street tees. Plastisol-coated versions are also available for buried service.
Two heavy end nuts thread onto the fitting body, compressing specially compounded resilient gaskets against the pipe. Cup-shaped retainer rings confine and protect each gasket, preventing friction between the gasket and end nut and providing an accurate sense of tightness during installation. The result is a flexible, bottle-tight seal on plain-end pipe that requires no pipe preparation beyond cleaning.
| Configuration | Seal Type | Sizes (IPS) |
|---|---|---|
| Cast & Steel Couplings — 5" Middle Ring | Seal Only | 1/2" – 2" |
| Steel Couplings — 10" Middle Ring | Seal Only | 3/4" – 2" |
| Reducing Couplings | Seal Only | 3/4"×1/2" – 2"×1-1/2" |
| 45° Ells | Seal Only | 1" – 2" |
| 90° Ells (Plain, Street, Threaded) | Seal Only | 3/4" – 2" |
| Street Tees & Regular Tees | Seal Only | 3/4" – 2" |
| Tap-N-Valve® Tees (Weld & MIPS Inlet) | Seal Only | 3/4" – 1" |
| Male Adapters & Line Caps | Seal Only | 3/4" – 2" |
| Cast & Steel Insulating Couplings — 5" Ring | Insulating | 3/4" – 2" |
| Steel Insulating Couplings — 10" Ring | Insulating | 3/4" – 2" |
| Insulating Reducing Couplings, Ells, Street Tees | Insulating | 3/4" – 2" |
| Plastisol Coated — Cast & Steel (Conductive & Insulating) | Seal / Insulating | 1/2" – 2" |
| Nom. Size (IPS) | OD (in) | Dim. A (in) | Dim. B (in) | Dim. C (in) |
|---|---|---|---|---|
| 1/2 | .840 | 2 | 5-7/8 | 5 |
| 3/4 | 1.050 | 2-7/32 | 5-7/8 | 5 |
| 1 | 1.315 | 2-9/16 | 5-7/8 | 5 |
| 1-1/4 | 1.660 | 3 | 5-7/8 | 5 |
| 1-1/2 | 1.900 | 3-3/8 | 5-5/16 | 5 |
| 2 | 2.375 | 4 | 6-1/8 | 5 |
All dimensions are maximum, approximate, and given in inches. Dim. A = end nut O.D.; B = overall length; C = middle ring length.
Contact us at sales@watermainsupply.com or 281.664.8000 — we can help confirm part numbers for your specific application including insulating, plastisol, and Tap-N-Valve® configurations.
Sign up for our newsletter and be the first to know about coupons and special promotions.
© 2026, Watermainsupply
