Model "1000LP" Pressure Reducing Regulator,Tfe/Al-Silicate Gaskets; 1" Size,Liquid Jet; Wcb Body & Spring Chamber; S2 Trim: Metal Seat,316SST Cylinder,416SST Plug,302SST Diaphragm; Npt Screwed; 4-15 PSIG Range Spring; Opt-12+14: One-Step Reduced Orifice,Integral Seat