Specialty Mfr
Specialty Mfr 6010090 Check Valve: 1/4" Pipe MNPT x MNPT
A nice surprise with Specialty Industries Co. was the free sample included in my order.
Specialty Mfr 6850290 Check Valve: 1/2" Pipe FNPT x FNPT
Specialty Industries Co. gear doesn't flex or crack under normal pressure, which is great.