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Old 10-05-2016, 07:35 PM   #11
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The jack hammering noise when you let the foot pedal go could be water hammer. If the pipes are not clipped well underneath this could happen. It mostly happens on rapidly closing valves or taps. Hence the reason they are fitted on washing machines/dishwashers with solenoid valves. when you flush the toilet try letting the pedal go slowly to shut off and see if it still does it. If that cures it, then that sounds like it could be the problem. You can fit hammer arrestors to cure this in homes although i will say i have never heard it in a trailer yet.
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Old 10-06-2016, 09:21 AM   #12
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The jack hammering noise when you let the foot pedal go could be water hammer. If the pipes are not clipped well underneath this could happen. It mostly happens on rapidly closing valves or taps. Hence the reason they are fitted on washing machines/dishwashers with solenoid valves. when you flush the toilet try letting the pedal go slowly to shut off and see if it still does it. If that cures it, then that sounds like it could be the problem. You can fit hammer arrestors to cure this in homes although i will say i have never heard it in a trailer yet.
Doesn't an accumulator tank do the same thing as a water hammer arrestor? It should absorb the pressure fluctuation.
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Old 10-08-2016, 09:06 AM   #13
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Doesn't an accumulator tank do the same thing as a water hammer arrestor? It should absorb the pressure fluctuation.
If it was satisfied and had taken all the water in that it could there would be no room for expansion into it so dont think it would help that much. To have it work properly too you would have to set it up at the right pressure (typically a small % less than incoming main pressure) before you put the water pressure on it. We use bigger versions on towers to make the booster pumps cycle less often. We still use hammer arrestors in every suite laundry box/dishwasher too.
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Old 10-08-2016, 08:50 PM   #14
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How much pressure do you have in the tank? 5-10 lbs is plenty and higher makes it not work right. It should store enough water to flush the toilet several times before the pump comes on. If the air pressure is at or close to the pump cutoff pressure, the tank won't store pressurized water.
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Old 10-08-2016, 08:59 PM   #15
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My new Greyhawk had the same issue. Turns out a my pump had a small piece of plastic stuck in the pump that made it through the pump screen filter, probably manufacture debris. I took the pump out and flushed it and the problem went away.

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Old 05-21-2017, 09:13 PM   #16
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Fixed!

I thought I would follow up with this post as I seem to have solved the problem.

To recap, I found my pump was noisy and pulsing, especially at night. I installed a 5 gallon pressure tank I picked up at Lowes and found that it helped slightly. However, I began having problems when flushing the toilet and found the pump would begin to pulse. I believed the issue may have been air getting into the line at the winterizing valve as I could put 6" of water in the winterizing line and a couple of days later, it would be gone (drawn into the system). After 3 trips to the dealer with responses such as we tightened a couple of hose clamps, you have air in your lines and it's normal, I contacted Shurflo. Shurflo recommended trying the pump silencing kit. I installed that kit prior to going out this past week and it appears the problem is solved!! The pump is much quieter and with the tank, we can go all night without the pump running. At this point it's the best $18USD I have spent on the trailer. Hopefully this may help some of the others that are having problems similar.
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