Model 1078 Rev B Pilot Operated Tank Blanketing Valve Vacu-Gard; 1" Size; Horizontal Outlet Position, Remote Sensing; Stainless Steel Body And Trim, Carbon Steel Diaphragm Cases, Stainless Steel Fittings And Tubing, Stainless Steel Pressure Gauges When Required; No Pressure Gauges; 1" Highflow Class 150 Flanged End Connections; 170% Flow Plug For 1" Highflow Option; FFKM 1 Soft Seats And Seals; 0.5" - 5.0" WC Range Spring (0.71" - 5.0" WC For 1" Highflow); Stainless Steel External Pilot Filter