I have one of the glycerin filled pressure gauges that I got from TFtestkits.net ... That thing is great!
Anyway I was just out of the pool and looked and it was showing a pressure of only 5 PSI which I thought was really strange. The flow seem to be good and my flow meter showed good flow so that left the pressure gauge. I popped the little vent plug off the top and glycerin came out and my pressure immediately jumped up to the expected 11 PSI.
Have to remember to let the gauge equalize as the outside temperatures are changing
Anyway I was just out of the pool and looked and it was showing a pressure of only 5 PSI which I thought was really strange. The flow seem to be good and my flow meter showed good flow so that left the pressure gauge. I popped the little vent plug off the top and glycerin came out and my pressure immediately jumped up to the expected 11 PSI.
Have to remember to let the gauge equalize as the outside temperatures are changing