Forum Discussion
opnspaces
Jun 17, 2025Navigator III
I got this from a search of the archives. Here's a link to the related post. But I pulled the relative part out and pasted it below as well.
Old-Biscuit
Polybutylene (PB) pipe is the gray tubing that was made between the late 70’s and mid 90’s.
The 'Quest' fittings are no longer made or available
PB pipe outside diameter is same as PEX so push on PEX fittings/valves can be used.
Sharkbite (Home Depot) Gatorbites (Lowes), Flair-It and SeeTech/Watts will all work
About DIY Maintenance
RV projects you can tackle on your own with a few friendly pointers.4,395 PostsLatest Activity: Oct 12, 2025