Diamond Lok-21® restrained joint PVC pressure pipe is manufactured in accordance with AWWA C900 in sizes from 4” through 24” to a DR18 with a pressure rating of 235 psi (1620 kpa). It is manufactured to a cast iron outside diameter (CIOD). Therefore fittings, valves and other appurtenances are readily available.

It is manufactured from NSF Standard 61 authorized materials meeting a 12454 cell classification with a hydrostatic design basis (HDB) of 4000 psi.

Diamond Lok-21® is manufactured to meet or exceed the requirements of the following:

AWWA C900 Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 inch through 12 inch (100 mm through 300 mm), for Water Distribution.

Diamond Lok-21®’s restraint system provides uniform circumferential contact thereby eliminating any concerns over point loading. Because it is a simple push together system, it dramatically reduces installation time while reducing complexity which exists for fused or bolted systems.

Diamond Lok-21® restrained joint PVC pipe is well suited for installation through bore casings and most applications which require joint restraint. Because it is PVC, you know you are getting superior long-term performance.