1 1/2" TESTanDRAIN Model 1011A, 175 PSI, 5/8" ELO 11.2 K-Factor

2" TESTanDRAIN, Thread x Thread, Model 2511T with 1/2" Orifice

1 1/2" TESTanDRAIN Model 1011A, 175 PSI, 7/16", 4.2 K-Factor

1 1/2" TESTanDRAIN Model 1011A, 25.2 K-Factor with Pressure Relief