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The Smith-Blair EZW Maxi-Grip restraint coupling joins and restrains plain-end pipe of the same outside diameter in a single stab-fit installation - no thrust blocks, tie rods, or separate restraint hardware. A one-piece grip ring with case hardened teeth engages the pipe as the followers are tightened, while the timing gasket skirt seals before the grip ring bites, so the joint seals and restrains in the correct order every time.
Rated for steel, ductile iron, PVC (DR26 minimum), and MDPE or HDPE with an internal stiffener (DR32.5 minimum, stiffener required on all PE). Available with standard low alloy or 304 stainless hardware for corrosive soils and wastewater service. For joining pipe of two different outside diameters, see the EZW reducing coupling.
| Working pressure | PE 200 psi | Steel 300 psi | Ductile iron 300 psi | PVC 235 psi |
| Follower flanges | 2-6 in: carbon steel per ASTM A569; 8-12 in: ductile iron per ASTM A536, Flexi-Coat fusion bonded epoxy |
| Sleeve | Carbon steel per ASTM A513 / A283, Flexi-Coat fusion bonded epoxy; 7 in standard length (10 in on 12 in size) |
| Grip rings | Case hardened teeth, carbon steel per ASTM A513 DOM 1026 (A36 on 12 in) |
| Timing gaskets | SBR per ASTM D2000, -40 F to +150 F |
| Hardware | 5/8 in HSLA track-head bolts and heavy hex nuts per AWWA C111; 304 stainless option with fluoropolymer coated nuts |
| Standards | Meets applicable AWWA C219; coating per AWWA C213 |
Downloads: EZWS Specification Sheet
For engineering-led selection support, restraint calculations, or a factory submittal, email sales@watermainsupply.com or call 281.664.8000.
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