On/Off Valve for 1-1/4" & 1-1/2" Mr. Pex Brass Manifolds

I had over tightened two valves on my manifold and they were leaking. Took 10 minutes to replace with these new valves. Works like a charm! Fast shipping good price. Thanks supply house!

See my review for the Mr PEX thermal actuators. These valves are controlled by the actuators, but the valves don't last more than about 10 years before they start leaking water, and some were leaking within 5 years. If the thermal actuators are positioned below the valve the leaked water will get into the actuator and likely cause it to fail. A possible solution would be to not design a system with the manifold positioned so that actuators are below the valves. The valves would probably still fail but the water might not get into the actuators and cause them to fail. A "work around" is to pre-emptively replace these valves before they start leaking but their service life probably varies for each system so hard to know how often to replace. Every 5 years? The valves are a lot cheaper than the actuators. I don't know whether other manifold companies have longer-lasting valves or actuators, but if you already have Mr PEX brass manifolds I'd recommend you pay attention to these valves and be prepared to replace them before leaks or stiffness in operation of the sliding pin might cause actuators to also fail. The photo shows the corrosion on the outside of valve from leaking and the degraded rubber parts. The steel pin no longer slides freely and this might contribute to actuator failure. Note that the amount the pin extends when the valve is closed is adjustable. Actuator instructions say that cylinder should extend about 0.5mm when actuator is off and valve is closed. I'd only recommend these to someone who already has a Mr PEX brass manifold because their frequent replacement may be necessary to keep the system working.