Poor flow in RV shower (valve?)

[Pat Traynor]

I've recently rebuilt my campsite and installed a simple shower stall ($360 from HD). I have an on-demand propane hot water heater feeding it. The faucet control valve is a simple 4" 2-handle type:

https://www.lowes.com/pd/Project-Source-Chrome-2-handle-Shower-Faucet-with-Valve/50244789

The water pressure going into both the hot and cold inputs into that control valve is very strong. But the combined warm water coming out of the valve is very low. I don't know why it's constricted to such a low flow level.

I believe that this extreme flow constriction is causing problems with my propane water heater (it keeps shutting off).

I've looked all over, and I'm seeing very little in the way of alternative control valves to replace this with.

Are there higher flow rate valves available that might fit my shower stall? Anything else I might try?

 

[Jeff H Young]

might be the shower head

 

[Sponsor]

 

[Pat Traynor]

might be the shower head

The problem exists when the shower head isn't connected. I took the control valve unit, connected the hot and cold water hoses to it and didn't connect anything to the mix output and the flow was still far less than what was going in.

 

[Jeff H Young]

try a 2 handle old school style like a price pfister that will work like a charm

 

[Pat Traynor]

try a 2 handle old school style like a price pfister that will work like a charm

By any chance could you give me a link to what you're talking about? I'm unfamiliar with it. Thanks!

 

[Jeff H Young]

google 2 handle shower valve lowes youll see one sorry dont know how to do a link

 

[Pat Traynor]

So then like this one?

https://www.lowes.com/pd/Pfister-1-2-in-ID-Iron-Pipe-Size-x-1-2-in-OD-Iron-Pipe-Size-Brass-Mixing-Valve/5014457791

 

[Jeff H Young]

yea they flow very fast not restrictive