MEC Underground Tank Fill Check Valve with Vent Valve, Brass 1-3/4 in. M.Acme x 1-3/4 in. F.Acme

These adapters are intended to be attached to the LP-Gas delivery truck hose outlets. They feature minimal ow restriction which allows for fast delivery while providing an integral check valve to prevent further product loss if the tank fill valve fails to close. In the event the tank fill valve should fail, leave the fill adapter connected to the fill valve and disconnect the filler hose end valve. Then place the filler valve cap onto the fill adapter. The tank fill valve should be repaired immediately. The ME574EXT extended version provides an additional 7 for use on underground tanks.|Prevents pinching or cutting of the delivery hose on the protective tank collar|Filler valve connection: 1-3/4 in. F. Acme|Hose end connection: 1-3/4 in. M. Acme|Standard handle style and brass construction