1-3/4″ ACME x Female Pipe Thread is the same size as the standard fill valves on RV’s, forklift tanks, and bulk tanks. Ideal for filling tanks when used in conjunction with the Propane POL Filler or the Propane ODP Filler.
$16.72 – $25.49
The part from Marshall Excelsior is an ACME adapter. One end of the adapter is a male 1 ¾” ACME which is the same type of connection you find on a fill valve and the other end of the fitting is FNPT (female pipe thread).