Recently, on another thread, I made some comments about pressure gauges, and I was met with opposition. Rather than hijack that thread, I thought I would bring up the topic here.
I'm of the opinion that they add very little value to the system. The main reasons I feel this way are:
-They don't last
-Since they don't last, there is no way of knowing if they are giving a reliable reading unless they are brand new
-The vast majority of situations where pressures are an issue involve pressure changes of roughly 10 psi, which can easily be seen through changes in the pressure at the return jets.
So why are they so critical? Why can't the average pool owner simply look at the return jets and see that there is very little pressure?