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Old 06-12-2009, 03:10 AM   #11
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Default Re: Roadtrek Low water pressure on city water

If I knew which hose went to the commode from the water pump area under the driver's side
bed, I'd give the compressed air a try. I assume the toilet water supply originates somewhere
after the pump, as does the sink water supply? The black disky thing I took out of the aerator
is actually the aerator itself and all the little micro-holes (my eyesight isn't great anymore) are
plugged with hwh gunk I fear. I guess the toilet line is plugged up the same.
I have the pictures of the water pump area and the hoses from the owner's manual,
for the purpose of showing the valve positions for winter and summer mode.
Wonder which one goes to the loo???
Has anyone else with a 2002 190P Chevy ever had reason to trace the hoses?

Cheers Ron for the thoughts. I may try the reverse air blast to see what happens.
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Old 07-11-2009, 02:17 AM   #12
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Default Re: Roadtrek Low water pressure on city water

As a follow up, I added a bit of vinegar (maybe a pint) to a full tank of fresh water and over the
last 4 weeks the bowl pressure has slowly improved. I also suspect the pump may have been fouled
with gunk from the heater, and it also seems to be improving as well. I've run the pump and added water
to the bowl a few times now, and it's not exactly 30 psi, but it's better than the trickle it was
when I first posted up this issue. If you haven't used your water pump for a week, how long does it take
to start sucking/filling lines/flowing? I suspect about 30 seconds to a full minute. That's what I'm seeing.

Thanks marko, VernM, and Ron for your ideas and theories. Much appreciated.

And thanks to julievojo and others for the vinegar idea. Might be the game breaker.
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Old 07-24-2010, 01:19 AM   #13
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Default Re: Roadtrek Low water pressure on city water

See my "noisy water pump" thread for what was probably the cause of the low water pressure noted in this thread.
Just gunk/calcium from my local and other potable water supplies has been slowly plugging the pump.
Got it cleaned today, with a full lesson from the RV repair guy who realized that was the problem.
I honestly didn't know how or where to look for the pump filter, or that they even had one.
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