Adding an External 20 Pound Propane Tank to Supplement Onboard RV Propane Tank

Question:

? abt connecting an external 20# DOT Cyl to fill port for RV Mtdd 20# ASME to supplement supply, Thor Sequence 2021 Mod K. Workable? Safe? Parts?

asked by: Larry A

Helpful Expert Reply:

Yes, you can do this, but to be clear, we will add a Tee fitting that will allow you to use your onboard propane tank and an outdoor 20 pound tank. You cannot use this to refill or add to the primary onboard tank.

You can use the JR Products # 37207-30135 Propane T-Fitting to go between the onboard tank and the POL connector currently attached to the tank. Then use a JR Products # 37207-30785 pigtail to connect your 20 pound tank.

You didn't ask about this but you can optionally use the JR Products # 37207-30825 to connect a grill, or propane tree to the last left over fitting on this tee.

Any connections with brass threads will need JR Products # 37207-30025 propane pipe sealant. Ordinary white tape sealant for water connections is not good enough.