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 directional drilling operations, 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.