04/08/2026
Did you know?
RV propane connectors are color-coded to indicate BTUs and flow rates. This is for towables (& a very select few Class Bās that utilize portable propane canisters vs permanent ASME tanks).
Black is rated 70k-100k BTU
Light green is rated up to 200k BTU
Dark green is rated up to 500k BTU
Red is for higher pressure systems
Iāve included two pictures of products that popped up in the top 3 when googling āreplacement RV propane hoseā. Youāll notice that one is black and one is dark green.
This is especially important to consider with the growing popularity of tankless style water heaters which have a higher BTU usage than tank style. Add your furnace, tankless, and stove usage all together and it may exceed a black connector rating. To find the BTU usage, youāll look at the appliance data sticker, or youāll need the model number to search.
The takeaway is that you should match the original color for safe installation on towables.