Flexible PEX hose.

You can get fittings that will adapt from PEX to standard braided vinyl tubing held on with hose clamps. They have lots of tubing connectors in brass or sometimes nylon like these: Amazon or look thru this page for ideas PEX to Tubing

Hose is available from eTrailer as well as many RV stores. I have never seen a proper 1/2 PEX to 1/2 hose adapter. Just because the RV industry clamps hose to a PEX fitting does not make it right. You need a hose barb that is larger and a different shape to connect hose. I find it funny that they say that an RV is tested to a certain water pressure while containing these mismatched components. A fitting that might work for you is this one, although still not correct. A hose should be connected to a barb such as this.

Hondavalk wrote:
https://www.homedepot.com/p/HydroMaxx-1-2-in-I-D-x-5-8-in-O-D-x-50-ft-Braided-Clear-Non-Toxic-High-Pressure-Reinforced-PVC-Vinyl-Tubing-1531012050/311926001

Yeah but I could never get PEX clamps to work with vinyl tubing, you have to use barbed fittings and a regular hose clamp.

agesilaus wrote:

Hondavalk wrote:
https://www.homedepot.com/p/HydroMaxx-1-2-in-I-D-x-5-8-in-O-D-x-50-ft-Braided-Clear-Non-Toxic-High-Pressure-Reinforced-PVC-Vinyl-Tubing-1531012050/311926001

Yeah but I could never get PEX clamps to work with vinyl tubing, you have to use barbed fittings and a regular hose clamp.

Yes that is what I used also. I got tired of my poor water pressure and dropped the underbelly and found the hose between the tank and pump kinked in 2 places.

Well I found a couple of spots in my RV where the highly trained factory technicians just forced the vinyl tubing on without barbed fittings and hose clamped it. How did I find these spots, by looking for the leaks of course.

The flex hoses may have been special made for the RV maker

I'd go to Sharkbite connectors Pex to 1/2 INch IPT and use flex hoses with screw on connectors. In fact. I'm going to.

wa8yxm wrote:
I'd go to Sharkbite connectors Pex to 1/2 INch IPT and use flex hoses with screw on connectors. In fact. I'm going to.

+1

wa8yxm wrote:
The flex hoses may have been special made for the RV maker.

Highly unlikely !

Do not use plain vinyl (un-reinforced). Hot weather and mild pressure will make it swell and fail !

When our rig was built, the plant was stocked with cross-linked vinyl tubing for flexible connections. Unfortunately, they seemed to be out of barbed fittings for the connections. They used typical PEX fittings, and clamps. Leaks randomly appeared throughout. The first few I changed replaced the crimp rings with gear clamps. This solved the problem, short term, but I eventually changed out every brass fitting that had vinyl connected to it.