... Specifications:[a] Our Model No. VRV-100:Inlet 1" Male Thread, Height 178mm (7 inches), Vent Diameter 19.7mm (0 ... b] Our Model No. VRV-125:Inlet 1.25" Male Thread, Height 178mm (7 inches), Vent Diameter 19.7mm ... ] Our Model No. VRV-150:Inlet 1.5" Male Thread, Height 242mm (9.5 inches), Vent Diameter 29. ... PSI);[d] Our Model No. VRV-200:Inlet 2" Male Thread, Height 242mm (9.5 inches), Vent Diameter 29.0mm ...