Do “still” RV water pumps run deep?

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By Russ and Tiña De Maris

Boondockers and other folks who get away from “city water” connections sometimes complain of a noise when using the RV water system. Sometimes they’re just not used to the additional noise produced by the RV’s water pump; at other times there are problems – most of which are easily cured.

“Demand” water pump systems – those in use on nearly all RVs built in the last couple of decades – pull water from the storage tank and pump it through the inside lines. While designed with sound-reducing isolation pads, sometimes these little “feet” can get away, or even a mooring screw can loosen up, causing undue vibration.

Locate your RV water pump and first ensure that it’s firmly tight to the bulkhead or deck. If a screw (or screws) is loose, retighten. If the noise persists, double-check to ensure that rubber isolation feet are under each contact point of the pump – and replace any missing parts. We found increasing the amount of insulation between the feet and the mounting surface can really help. Something as simple as a thick computer mouse pad can make a big difference. One of our readers gave up altogether on this tack: He suspended his pump on nylon cords.

Others have noted that if the pump is mounted on something like a thin wall (you’d think those RV engineers would invest in a brain, but, oh well …) that no amount of foot insulation will help. Aside from doing the suspension thing, try and find a thicker, more solid surface. An area on the floor has got to beat a wall anytime.

Sometimes it’s the water lines that take a finger-point for noise emanations. Here are a few tricks: You could try wrapping the water lines near the pump in polyfoam pipe wrap, attached firmly with electrical wire ties. Others swear by using a softer hose material and forming a loop a foot or so long, on both the inlet and outlet side of the pump.

Do "still" RV water pumps run deep?At times, water systems that make noise can be quieted with the addition of an accumulator tank. The accumulator is nothing more than a simple reservoir with a cushion of air. When the water pump operates, it pushes up water pressure against that cushion, often reducing the number of “off-on” pump cyclings and evening out the water pressure flow. Accumulators are fairly easy to install and, happily, there’s competition to bring the price down. A few years ago you’d spend more than $50 for a Sureflo brand. Now the “new kid in town” offers an accumulator for less than $30, which many users rate positively. Here’s a link from Amazon.

You may not want to completely squelch the noise from your water pump. Like one wise RVing grandfather said, “I like to hear my water pump. It warns me when the kids have left the shower faucet turned on!”

##RVT910

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Colin Flagg

I think of the noise as an assurance that the pump is working right. I had an old jaguar with an electric fuel pump, no noise meant I was going to be stranded soon by the side of the road.

Dr4Film

Accumulators only delay for a very brief moment the water pump from turning on so it doesn’t help one bit with reducing the noise from water pumps. The water pump itself needs to be isolated from the area where it is mounted using thick soft cushioning rubber. Plus using flexible hoses going to and from the water pump will greatly reduce the pulsations and vibrations heard and felt.