JaxDad wrote:
...
Your unit has one pump now, likely right next to your fresh water tank, it has a built in pressure switch that turns the pump on when the water pressure downstream drops below about 35 psi and shuts the pump back off again when pressure builds back up to around 50 psi.
This setup means every portion of the water system, be it hot or cold, downstream of the pump is under pressure, the SAME pressure created by one single pump.
What you are proposing is to merely add a few more feet of plumbing within that same, equalized pressure system. Without a difference in pressure between the two ends of a tube nothing will flow until you put a pump between those two ends.
12genusa tee'd in on the suction line of the pump, so there is a difference in pressure, and he says it works fine.
Personally I like myredracer's extra pump at the bath faucet idea because putting in an extra line would be a real pain in my trailer. That pump would have to be a special one though to handle the heat, and you wouldn't want it to passively allow water through when only one faucet is opened.
