We have recently received a number of calls from residents regarding a series of similar-type leaks in the kitchen and bathroom.  In responding to these calls, we have observed that in many of these cases the problem lies with the brass Compression Angle Stop Valves installed under the sinks and toilet tanks (pictured right).  These valves over time tend to cut through the CPVC piping that service them and begin leaking.

We contacted Charlotte Pipe and Foundry Company, manufacturer and distributor for CPVC pipe.  They were aware of the issue and had published an advisory in their technical manual for CPVC that warned consumers and technicians about the potential threat of the pipe cracking under the strain of these types of compression fittings (Charlotte Pipe and Foundry Company, FlowGuard Gold Installation Technical Manual – TM-FGG, pg 9).

We recommend replacing these valves with a similar style valve that we believe is better suited for CPVC (pictured left).  These valves are attached to the piping using glue instead of compression, which is more consistent with the rest of your CPVC system.