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Old 09-02-2015, 10:04 AM   #1
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Water Pump

I have a 2015 Canyon Star with an on demand hot water heater. I have come to the conclusion that most of the problems with the hot water have been lack of sufficient water flow. We have cleaned and changed all filters multiple times with no improvement. Unfortunately, unless the campground has high water pressure we also have what I would consider insufficient flow/pressure. Has anybody else run into this, if so, what was your solution? My next question would be, is there an upgraded water pump that could be installed? Thanks in advance.
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Old 09-03-2015, 06:47 AM   #2
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I just fixed the same problem on my 14 Fleetwood Bounder. The hot would flow at less than 50% of the cold. To get a comfortable shower temperature you only had to barely crack the cold side. I had heard a whirring, buzzing noise coming from the water heater area and the pump would also cycle on and off when the hot water was run. It didn't make the noise and the pump ran consistent when cold water was run. I removed the one way valve on the outlet of the hot water heater. The valve was not opening completely and causing the buzzing. (its the brass thingy between the pex tubing and the white braided water line.) The hot water now runs great! The only problem is that now when I go to winterize it, antifreeze will flow back into the water heater. Im either going to try and find a better quality valve that is perhaps adjustable or just replace the old valve when winterizing. I have an access door with hinges underneath the motorhome that gives good access to the water heater. You might want to check if you have the same one way valve. IMHO it just doesn't flow enough.
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Old 09-03-2015, 08:11 AM   #3
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Mojoracing, If you can't find a better check valve a ball valve would work when winterizing and be more convenient.
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Old 09-03-2015, 11:57 AM   #4
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I don't have much expertise with the RV on demand water heaters, but most household on demand systems, require a certain amount of flow to trip the sensor and have the computer board to turn on the heat. My father had this problem, and found he always had to have the hot water turned on full, then adjust with cold, in order for the on demand heat to work.
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