LPG filling stations fit forklift tank filler valve threads (1-3/4 ACME) not standard 20lb BBQ tanks threads. The 20lb BBQ threads are male 1-5/16″ ACME (OPD) threads, however most adaptors fit on the inside like this device designed to refill 1lb tanks from a standard 20lb:
enter image description here Where can an adapter be found to simulate a forklift tank filler valve?

  • Just another question where OP's location may be of help. I know of somewhere in UK that probably makes just what you need.
    – Tim
    Feb 4, 2023 at 15:11

1 Answer 1


If I understand correctly you want to adapt a 1" P.O.L. to a 1-3/4 ACME so that you can fill your BBQ propane tank with a different connector.

In that case you'd want something like this.

adapter picture
(source: ebayimg.com)

1-3/4" ACME to 1" POL Adapter

If you do get something like this, make sure it comes preassembled, or assemble carefully with yellow teflon or propane rated pipe dope.

  • 1
    You are right, The 1" POL end fits inside and the 1-3/4" ACME is the Forklift tank threads. 1-5/16″ ACME (OPD) is what a standard BBQ has.
    – Dale
    Jan 19, 2016 at 18:56

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.