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Old 12-01-2014, 04:30 PM   #15
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I have an expansion tank that came with the MoHo. It looks like it might hold a gallon at max. It needs to be pumped up at 20PSI.Though noisy, my pump only needs to run occasionally.
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Old 12-01-2014, 05:03 PM   #16
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Quote:
Originally Posted by J Birder View Post
You can often reduce the pump noise by mounting the pump to a piece of 1x? wood with rubber mounts, and then mount the wood with a second set of rubber mounts.

Joel
I did just as you describe here Joel, and added some flexible hose to the outlet and it worked like a charm! Sure made a big difference.
Also as Ols Scout said, don't over tighten the bolts to the rubber mounts.
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Old 12-01-2014, 07:35 PM   #17
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Surge/expansion tank can be mounted anywhere. When mounting, just consider how it will affect your winterizing routine.
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Old 12-01-2014, 08:01 PM   #18
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Surge/expansion tank can be mounted anywhere. When mounting, just consider how it will affect your winterizing routine.
I think that mounting a tank inside the MH could only help the winter blues, and after this last trip (our first in sub-freezing weather), I'm keen to know more.

We left the hose connected and it froze, causing me to pour warm water onto the spigot to un-screw the frozen hose, then take said stiffy into the shower to water it down to decent temp What was I thinking?


Off the subject, but if the wet bay heater didn't come on, how would we go about testing the heater if it's activated by low temps???
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Old 12-01-2014, 10:02 PM   #19
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Expansion tank, of course! What GPM is worthwhile, and is it accurate to think that the more GPM, the more cycling time?

If space is limited, can we platoon a couple of tanks in-line, for more effect?
The GPM is not the issue, it's the pressure drop.

Yes you can install as large a expansion tank as you have room to mount. I've read of at least one guy who made his own from 6"D plastic pipe and 2 end caps. He made it for, and mounted it in an available space. The downside to a homemade expansion tank is, it has no bladder to pre-pressurize, so it must be drained frequently to restore the air space, as jostling water will absorb the air.
The tank has only one port, put that on the bottom and the tank will always drain when you open the low point drain valve; no freeze worries.
Not related to RV's, but I have a capped vertical length of copper pipe in my house plumbing to stop "water hammer" noise/vibration. It's a minature expansion tank.
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Old 12-01-2014, 10:38 PM   #20
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I have a slightly different view on this.

I agree that a way needs to be found to make our water pumps QUIETER.

I do not agree that a way needs to be found to make our water pumps NOISELESS!

More than just a couple of times I have turned my water pump off because I could hear it running continuously. Each time there was a good reason, like one time I had run out of water. Another time, I had forgotten to close my city water valve.

If my pump was noiseless, it probably would have run and run and run, until it was too old and tired to be able to run at all.

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Old 12-02-2014, 07:02 AM   #21
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Shurflo has a couple of new pumps out that reduce noise. I installed one, and it works better than the original one. I still can hear it, but it doesn't wake up the entire campground.
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Old 12-02-2014, 07:12 AM   #22
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Guess I'm lucky. Our 17 year old pump is still working fine and runs with just a hum.

And I agree - it's something that you really do want to hear....
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Old 12-02-2014, 08:11 AM   #23
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Guess I'm lucky. Our 17 year old pump is still working fine and runs with just a hum.

And I agree - it's something that you really do want to hear....

Any idea about brand and model of that pump? A hum beats a ratta ratta any day.
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Old 12-02-2014, 08:25 AM   #24
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Old 12-02-2014, 08:49 AM   #25
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The pump is an old ShurFlo. My point has to do with how it's installed - and how subjective the noise it makes can be?
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Old 12-02-2014, 09:14 AM   #26
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I have the same problem. I can see that my pump was mounted wrong from the factory. This has been a low priority for my because we are mostly on park water.

The noise is always going to be there. The more flex you have for the lines at the pump the less noise will be telegraphed through the pex. My plumbing is snug tight, and the pump even has the noise reducing hoses on it. Some sound is good. The OP description is NOT NICE!
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Old 12-02-2014, 10:45 AM   #27
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Does anybody know of a unit that makes the least amount of noise? Regular pumps just hum, and my MH pump rattles. Are all of our pumps rattlers?
The Shurflo Revolution is waaay quieter than the Flojet it replaced because I couldn't stand the noise.
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Old 12-02-2014, 10:46 AM   #28
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I have a slightly different view on this.

I agree that a way needs to be found to make our water pumps QUIETER.

I do not agree that a way needs to be found to make our water pumps NOISELESS!

More than just a couple of times I have turned my water pump off because I could hear it running continuously. Each time there was a good reason, like one time I had run out of water. Another time, I had forgotten to close my city water valve.

If my pump was noiseless, it probably would have run and run and run, until it was too old and tired to be able to run at all.

Jim
Very good point!
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