Can You Refill Your ASME On-Board LP Tank With An Auxiliary LP Tank
Updated 12/15/2025 | Published 11/03/2024
Products Featured in This Question
Question:
When on a road trip in my RV, it is often not a propane service station available. If I can do my own fill from a portable tank it might work. I dont have the valves and piping to use other adapter fittings that other RVs have. Vehicle: Airstream Interstate Van I want to refill my RV propane tank via the filler valve from my 20 lb. high-pressure BBQ tank. There must be a compatible fitting for this. I also have a propane bottler refill adapter that might work. See images for a better description.
asked by: Herman T
Expert Reply:
Hi Herman,
In order to refill your onboard tank you would need an ASME fitting which isn't something that we offer. If you can see the regulator then we can look into a tee like the # 103537-MBS which would allow you to connect auxiliary tanks to the motorhome's propane system and fuel any LP appliances. You would still need to go to a qualified LP distributor to refill the ASME tank. You have to take training, pass a written test and pay for a Propane Dispenser License before you can fill propane tanks so this work around is really the only reasonable option.
Product Page this Question was Asked From
Replacement Propane Adapter Hose for Ignik Gas Growler Propane Tanks
- Propane Fittings
- Hoses
- Adapter Hoses
- 4 Feet Long
- Type 1 - Female
- 1 Inch-20 - Male
- Ignik
more information >
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on Propane Fittings
Chris R.
12/15/2025
Hey Herman, how did things go with the tee fitting option for your Airstream Interstate’s propane setup? Your results could really help others looking for a safe way to connect auxiliary tanks on the road.