Allpoints 521106 Second Stage Regulator1/2" Fpt In X 3/4" Fpt

second stage- 1/2" fpt inlet x 3/4" fpt outlet, (for 1/2 x 1/2 order r522-bcf), max inlet 10 psi, and is adj 9.5-13 inches w.c., for vapor service - not liquid service fisher # r622-cff.