Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 10, 2025 ...

Re: FIXED - low water flow inside coach - both shore and water pump 2003 U320

Reply #50 – August 09, 2021, 06:55:19 pm

Checking the expansion tank is EASY.

It has a valve just like your car tires.

Release pressure on the pressure water system:  Shore water OFF.  Pump OFF.  Open a faucet and bleed off water pressure.

Unscrew the cover on the tank end. Start by pushing in on the valve for just an instant.  If water comes out-- it is toast (rubber bladder perforated) and needs to be replaced.  If air comes out, put your tire gauge on it.  PSI should be your pump CUT-IN PSI less 2 PSI.  So for the common pump with 25 PSI cut-in PSI, it should be 23 PSI.  If lower, I just use a regular bicycle pump to inflate it.  If using coach air system PSI, be VERY careful-- volume is small.

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Re: FIXED - low water flow inside coach - both shore and water pump 2003 U320

Reply #51 – August 09, 2021, 07:55:43 pm

With my old shower head, the pump would cycle while showering.  This resulted in a shower stream that was low-high-low-high, etc, as the pump ran and built pressure, then pressure dropped and the pump ran again, etc.  No accumulator in my system.  With a new, higher flowing shower head (restrictor removed), the pump now runs continuously when showering and pressure is constant.

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Re: FIXED - low water flow inside coach - both shore and water pump 2003 U320

Reply #52 – August 09, 2021, 08:43:38 pm

With Dick having low water shower head flow on city water & water pump, the issue is not the pump. Remove shower head to see if water flows ok. If this is a long-time problem there could be an original water restrictor in the shower head. If shower head is clogged, soak it in vinegar may help.

How is water flow at bath & kitchen sinks?

Shurflo 4008 is also our pump and is not likely the problem, and only cycling because of shower's low flow.

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