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Old 05-19-2016, 10:53 AM   #43
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1. The Flojet on-demand pump made a huge racket. Turning the shower caused the whole side of van to vibrate. Popped the access panel at floor level by the heater and the problem was obvious. It was not the pump! But rather, a length of Pex pipe that went to an elbow. The pipe was cut just a hair too long causing it to touch a metal part of the chassis. That in turn amplified the sound ten fold.

3. The water pressure in the sink faucet was very low. When you first started it, you got nice flow but it would go to a trickle with the pump cycling on and off instead of increasing run time to keep up with pressure.
I've found the water pump makes a lot more noise if there's even a small amount air in the pipework. It takes some persistence to get out all the air, by opening each of the faucets in turn and moving the handle from cold to hot to cold, etc. The noise comes from the pipes vibrating against things along their runs.
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Old 05-19-2016, 02:35 PM   #44
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I've found the water pump makes a lot more noise if there's even a small amount air in the pipework. It takes some persistence to get out all the air, by opening each of the faucets in turn and moving the handle from cold to hot to cold, etc. The noise comes from the pipes vibrating against things along their runs.
That's good advice.

I am amazed though that these noisy pumps are still used. They don't even do much to contain their noise. And the compartment it was in was a disaster, full of runs of pipe and wire all going every which way. Organizing them and keeping the from each other would stop some of the transmission of noise. And would make the joints last longer.
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Old 05-19-2016, 04:07 PM   #45
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That's good advice.

I am amazed though that these noisy pumps are still used. They don't even do much to contain their noise. And the compartment it was in was a disaster, full of runs of pipe and wire all going every which way. Organizing them and keeping the from each other would stop some of the transmission of noise. And would make the joints last longer.
It's cost and time saving: to tidy up the wires and pipework is very labor intensive and they can't spare the time during the production schedule. A trip to the factory will highlight the methods they use to build these things.
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Old 05-19-2016, 04:38 PM   #46
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Well, you found a couple of things that would have been annoying to discover later...that is a step ahead of most of us here!

Have a great time.


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Old 05-19-2016, 07:21 PM   #47
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3. The water pressure in the sink faucet was very low. When you first started it, you got nice flow but it would go to a trickle with the pump cycling on and off instead of increasing run time to keep up with pressure.

4. If you closed the main AC vent that is pushing air down, the left side of the AC would make a gurgling sound. Nothing major but a bit annoying now that I know about it.
#3 indicates something is wrong especially if the lav faucet is normal.

#4 Surprised that you can hear anything if the A/C was on and fan on HI. I'd check the temperature drop across the evaporator. Dometic said it should be 21*F.
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Old 05-19-2016, 07:40 PM   #48
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The grille on the water heater was the first thing I fixed. I had the U shaped piece of black vinyl trim that fit perfect. I removed the two screws that held the top of the mounting frame in place, drilled the holes in the grille and put SS screws back in the same holes.
I have had no problem with the hot water heater. I was scared I would run out on my first shower but it worked great.
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