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The Smith-Blair EZW seal and restraint line cap closes an open pipe end and restrains itself against line pressure with built-in gripping members - no strapping, blocking, or welding. It stabs onto the cleaned pipe end and torques down like an EZW coupling, making it the fast answer for capping abandoned lines, pressure testing sections, and temporary end-of-line closures that must hold pressure safely.
Suitable for steel, ductile iron, PVC, and PE with an internal stiffener. Available with standard low alloy or 304 stainless hardware. Caps are supplied with a threaded outlet with plug for pressure testing and purging; caps cannot be converted to standard seal and restraint couplings.
| 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: Line Cap Specification Sheet | Line Cap Brochure | Installation Instructions
For engineering-led selection support, restraint calculations, or a factory submittal, email sales@watermainsupply.com or call 281.664.8000.
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