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Old 05-22-2019, 10:50 AM   #11
busterbrown
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Originally Posted by Bechard View Post
I'm starting to wonder if wrapping the water lines in pipe insulation for 2" where it goes through any panels would help. I've also read of people mounting the pump on top of a mouse pad to further insulate.
This is what I did to my Bullet. First order was to replace the loud OEM pump.

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Old 05-22-2019, 02:46 PM   #12
GMcKenzie
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Originally Posted by JRTJH View Post
It's all "helpful" but trust me when I say, "You'll still hear your pump when it turns on, especially at night, when it's quiet. Hoping for "silence" is only a pipe dream when it comes to 12 VDC water pumps in a "built to be light enough for half ton towing" RV.
Biggest reason I put in an accumulator tank. Our pump is on DW's side of the bed. I'm the one who gets up 2-3 times a night. So flushing the toilet would wake her up. With the tank, we can turn the pump off and still have enough water for flushing.
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Old 05-23-2019, 02:52 AM   #13
FlyingAroundRV
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Originally Posted by Bechard View Post
The RV service manager believes my issue is the backflow membrane in the pump.
Yes, that sounds right to me. All water pumps have a non return valve in them. That is how they maintain the pressure in the lines when the pump is off and that pressure is used to turn the pump off. Also, that non return valve stops the city water from flowing backwards through the pump into the FW tank. There should also be a non return valve between the city water inlet and the pump outlet so that when the pump is operating it doesn't pump water out of the city water inlet.
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Old 05-23-2019, 09:50 AM   #14
Bechard
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I just heard back from the dealership and hour ago. The service manager did confirm that the pump was defective as the backflow wasn't working. They swapped the pump out for a new one under warranty, and adjusted two sticking cabinet doors for me.

Back to the camping season!
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Old 05-27-2019, 01:26 PM   #15
apachewolf
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Originally Posted by Bechard View Post
Just an update, I ended up biting the bullet and just towed an hour to the dealership under warranty. The RV service manager believes my issue is the backflow membrane in the pump. They are going to take care of it and have my trailer ready for pickup on Saturday.

Do people normally keep spares?
I have had 3 pumps replaced (Shureflow) and finally told the dealer to install a brass check valve at the pump. We''ll see how that works.

Happy camping.
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