Model 1088 Rev B Spring Operated Tank Blanketing Valve Vacu-Gard; Horizontal Outlet Position, Internal Sensing; Stainless Steel Body And Trim With Epoxy Coated Carbon Steel Diaphragm Cases; No Pressure Gauges; 1/2" FNPT End Connections; 100% Flow Plug; Buna-N Soft Seats And Seals; 14" - 30" wc Range Spring; No External Filter