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Old 04-20-2015, 01:48 PM   #11
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I am leaning with the leak, air or valve issue first. Usually once the system charges the pump shuts off. If that is not happening something is either wrong with the pressure switch or you have a leak somewhere. Is your winterization valve open? This could be introducing air to the system when on and won't leak since it is behind the pump.

The accumulator is good for short cycling elimination and helping the pump maintain pressure with some breaks. I have a 2 gallon on mine and it will run for about 10 seconds wide open before kicking on. This too reduces "hammering" which is a short abrupt stoping of the water flow.

Pipe insulation is a great cheap tool to insulate pex from hard structures and reduce noise as well.
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Old 04-24-2015, 01:39 PM   #12
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……………..Our manual says not to use an accumulator……
====
That's interesting. I was just reading the Atwood water heater instructions the other day, (imagine that, a man reading instructions!) and it says that the Atwood water heater has an intentional air gap built into the top of the water heater.(I did not know that) But, over time the air will be absorbed into the water, and explains how to drain enough water to get the air gap back.
It goes on to say that a dripping pressure relief valve is not an indication that it is bad.
Lastly, it says that installing an accumulator may help.
Probably, when there is no more air in the water system, hydrostatic pressure may cause the pressure relief to vent. Adding an accumulator, which has a rubber bag separating the air from the water, may solve several problems: dripping relief valve, hammering sounds, and excessive pump cycling.
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Old 04-24-2015, 03:09 PM   #13
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There is a small accumulator tank that is made for the Shurflo pumps. I installed this one along with my sound reducing mod as shown to cut down on the short cycling and pump noise. Others have installed the previously mentioned 2 gallon tank with good results as it has more volume, if you have the room for it.

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Old 04-24-2015, 03:17 PM   #14
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Wow, nice installation Crabman. I sure don't have that kind of room where my pump is located.
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Old 04-24-2015, 03:22 PM   #15
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Quote:
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Wow, nice installation Crabman. I sure don't have that kind of room where my pump is located.
Thanks. This is what it looked like before the mod. It was mounted to the wall that separates the kitchen from the front bedroom under the kitchen sink. It was VERY LOUD before this mod, hammered like a jackhammer..

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Old 04-24-2015, 06:14 PM   #16
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Does the Accumulator have to be tied directly into the pump or can it be somewhere else?
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Old 04-24-2015, 06:57 PM   #17
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I would think anywhere in the cold water line would work. I have two in my garage that is located some distance from where the pressure switch is and they seem to work fine. If I install one, it's going to have to be on the opposite end of the trailer from where the pump is.
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Old 04-25-2015, 09:55 AM   #18
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Quote:
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Does the Accumulator have to be tied directly into the pump or can it be somewhere else?
Anywhere in the system. Around the pump sometimes is easiest with connections due to there being threads vs pex.
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Old 04-25-2015, 10:01 AM   #19
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Well mine was horrible echoing through the camper and the installation of the silencer kit and insulating the pex lines where the contacted the wall or floor with standard pipe insulation has almost completely silenced it.
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Old 04-25-2015, 07:25 PM   #20
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silencing kits are available at RV supplies, small air tank that attaches to pump, you put about 25 lbs of air in it stops the hammering about 30$
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