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The Smith-Blair EZW Maxi-Grip restraint reducing coupling joins and restrains plain-end pipe of two different outside diameters - steel to ductile iron, PVC to steel, old cast sizes to new pipe - in one stab-fit assembly with no thrust blocks or tie rods. Each end carries its own timing gasket and case hardened grip ring sized to its pipe, so both ends seal first and then restrain as the followers are tightened.
Rated for steel, ductile iron, PVC, and MDPE or HDPE with an internal stiffener (required on all PE). Available with standard low alloy or 304 stainless hardware. Select by the large end x small end pipe OD combination; for same-OD joints see the EZW straight restraint 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: EZWR 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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