One Way Check Valve 1/2" Female Backflow Preventer, Check Valve for Repair NPT Female Thread Brass Float Reinforced - 0,5 inch Float Brass For Plumbing Water Boiler Heating System

Great little solid brass check valve. Not sure exactly what the cracking pressure is but I'm guessing around 10 because it's pretty tight. A little too tight for use on a RV pump but perfect for street pressure in a house.

good quality brass valve, expect good performance,

Fit in tight space, working perfect.

My husband needed them to use for repair

Well made. Nice check valve.

Threads are not NPT (not tapered) so it will not seal even with sealant on the threads.

Very bad craftsmanship

I've done plumbing jobs for 30+ years. No matter how much you tighten the fitting it leaks at the threads. Teflon or pipe dope doesn't help. Save $$$ and don't buy this junk!!