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Old 04-14-2016, 05:38 PM   #1
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Water pump pulsating can it be stopped ?

I have a 2015 Itasca Sunstar and when using the dc water pump the water pulsates and so does the pump. I'ts not a big deal just a little annoying . Is there a pressure tank (small) or a bladder that can be added ? Thanks , Chuck
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Old 04-14-2016, 05:50 PM   #2
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Chuck I've had the same issue. It just needs a little adjustment. Now providing we have the same or similar pumps.....I have a 2014 Ellipse...this is what you can try:

First access your pump, and on the bottom, near dead center of the unit, up inside a concave hole, is a little allen screw. Sorry, don't remember what size, but it's small.

Next, with one faucet (like bathroom) running wide open, go outside to your pump and turn the allen screw mentioned one way or the other slowly until desired effect (smooth running) is achieved. It usually doesn't take too much.

See how that goes, and give us a report back here with results. Hope it works for you.

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Old 04-14-2016, 06:04 PM   #3
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Mine does that when its below half full. I keep it above that line
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Old 04-14-2016, 07:52 PM   #4
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RVHERE, here is a link to a manual that explains the pybass and pressure switch adjustments.
http://www.northerntool.com/images/d...uals/32389.pdf
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Old 04-15-2016, 09:30 AM   #5
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I added the Surflo accululator tank to mine along with the silencing kit, made a big difference.

It would actually cause the overhead led lights to flicker when it was pulsating, the tank fixed that. Now it either runs full blast or not to fill tank while the water output is smooth.

You might want to try the adjustment first, which I didn't know about until after I installed tank, but the tank was a super easy install.

In the future I might look at a true variable speed pump, the Surflo seems pretty primitive and although much quieter now after tank it's still annoying being mounted under bed in my Vista.
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Old 04-15-2016, 10:35 AM   #6
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Quote:
Originally Posted by jharrell View Post
I added the Surflo accululator tank to mine along with the silencing kit, made a big difference.

It would actually cause the overhead led lights to flicker when it was pulsating, the tank fixed that. Now it either runs full blast or not to fill tank while the water output is smooth.

You might want to try the adjustment first, which I didn't know about until after I installed tank, but the tank was a super easy install.

In the future I might look at a true variable speed pump, the Surflo seems pretty primitive and although much quieter now after tank it's still annoying being mounted under bed in my Vista.
We did thee same thing to both our 2001 and 2013 Adventurers. It costs about $45.00 for the accumulator and another $20.00 for the silencing kit. As mentioned the pump is now silent and runs only at full speed when needed.
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Old 04-17-2016, 08:50 PM   #7
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Thanks I will try the accusatory tank but what is the silencer kit. Chuck
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Old 04-17-2016, 09:01 PM   #8
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silencer kit has hoses to put put on both sides of pump to limit the transmission of vibration into the motor home. Is only needed if hard pipe is run directly to the pump.
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Old 04-20-2016, 11:08 PM   #9
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There should be rubber grommets on the bottom the pump mount, if they are missing or the screws holding the pump to the floor/wall are over-tightened you hear more noise. This in addition to using hose for water connections to the pump makes a considerable difference.
Pulsating; most times the cause is, the air cushion in the water heater has disappeared. This causes the pump to shut off/on quickly and water pressure reflects this.
To rectify, shut off water supply, open a faucet to remove all pressure, open the over-pressure valve near the top of the heater tank, remove drain plug and allow a gallon to drain, replace drain plug, close over-pressure valve, turn on water supply.
Where did the air cushion go? It becomes absorbed by the water in the tank, thus the procedure.
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Old 04-22-2016, 02:48 AM   #10
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RVHERE,
try bleeding the air out of the pump and pipes by opening the drain valve and draining about 2 gallons of water with the pump on.
this procedure makes my pump run quietly.
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