I would get a 0-15 psi gauge. Make sure it is graded!, if not, you really don't know what you have.

The link sparkplug put up has some decent ones. Don't know what brand you'll get tho with McMaster, but they usually have some decent stuff. You can call and ask.

I was looking at a few brands that I like, but they cost more than your pump.

Dwyer has a decent gauge here, not liquid filled, but is an accuracy grade 1A, 0-10 psi, so that's accurate to 1/10th psi. Dwyer
It is a low pressure gauge tho, so you have to be careful not to spike them. I like their differential pressure gauges for low measurements. You can plug one port and use it for direct pressure, or use both ports for measuring pressure drop from point A to B. Valves are notorious for pressure drop, so are flow meters. Pressure drop in a system is permanent, so If it is critical, you need to know what that is.

This explains gauge grade accuracy: Gauge Accuracy

Do both tests exactly the same tho.


Last edited by JKB; 07/30/13 04:08 AM.