How reliable is the diverter seal in a 3-way Never Lube Jandy Valve? Can I use that valve to isolate certain pipes during pressure testing, at say, 15 or 20 psi?
I'm interested if it can be used in either direction, that is:
1) If I set the valve to close a certain pipe, can I pressurize that pipe, and expect the valve to hold pressure and prevent leaking into the other two pipes?
2) If I set the valve to close a certain pipe, can I pressure the remaining two pipes, and expect the valve to hold pressure and prevent leaking into the closed pipe?
The seal is loaded from opposite sides in the two scenarios, and if either is expected to be a good seal, that could simplify my pressure testing setup a lot.
I ask this because my valve is definitely leaking some currently, and I wonder if it worth trying to replace the seals, or should I just not care. The leak is not an issue normally, because the only effect is that every time my pool pump is on, the spa spillway is dripping about a drop or two per second into my pool. But for a pressure test, this leakage would invalidate the results, I assume.
Thanks for your advice!