the cap is 4 inches in length and welded to the support arm

DECK MNT 4IN

25' x 10' Single Bowl Undermount Kitchen Sink

Extended thru-bots 3/4" past nut

PolyJohn Fleet Portable Restroom

Hayward Check Valve, 1 1/2 in, Single, Y, PVC, Flange x Flange - YC10150FE Height-40" the cap is 4 inchesItem Check Valves: Check Valve; Flow Design: Single; Mechanism and Body Design: Y; Body Material Valves: PVC; Pipe or Tube Size Check Valves: 1 1 2 in; Connection Type Check Valves: Flange x Flange; Cracking Pressure Check Valves: 1 psi; Mounting Orientation Check Valves: Horizontal, Vertical; Seal Material Check Valves: EPDM; Max. Temp. Valves: 140 Degrees F; Min. Temp. Valves: 40 Degrees F; Max. Water Pressure Valves: 150 psi @ 70 Degrees F; Max.