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Old 10-06-2016, 12:55 PM   #1
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Water Pump Pulsating

Need your help on how the water pump should be working. I have a 2014 FR3 28. Is it normal for the water pump to pulsate when you turn the water on either in the kitchen or bathroom. It doesn't make a difference if you turn the water on just a little bit or wide open. It also pulsates if the holding tank is full or close to being empty. Your advise would be greatly welcomed. Thanks
John
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Old 10-06-2016, 01:01 PM   #2
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i have the same thing happening on my 2015 tracer 235AIR
and actually the lights in the bathroom flicker when the pump pulsates
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Old 10-06-2016, 01:19 PM   #3
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The pulsating is normal, as the pump develops what pressure it can in the plumbing in your RV.

As the pump motor has higher starting current, than run current draw once it is spinning, it causes voltage drop when it first starts and the flickering lights you see are also normal.

Neither of these conditions are a problem.

Some people add an "accumulator" or pressure tank to smooth out water flow, so the pump runs enough to build some pressure and then stops, and you can run water for "a while" until the accumulator tank has given what water it can. *** NOTE *** this addition is even specifically documented in some of the versions of the Forest River Owners Manuals.

Our previous TC and our present 235 behave in exactly the manner you describe. The "accumulator" tank is on the short list of first projects come next Spring, we'll probably eBay a suitable tank over the Winter.
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Old 10-06-2016, 01:30 PM   #4
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thanks!! Jeff_and_Abby makes sense although my previous TT's never had that pulsating and lights flickering hope to see some pictures of the accumulator tank project.
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Old 10-06-2016, 01:41 PM   #5
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Old 10-06-2016, 02:05 PM   #6
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Thank you for the information, I rest easy now. Will look into a accumulator tank, may have to add one.
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Old 10-06-2016, 02:20 PM   #7
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There are at least a couple (probably more) excellent threads here of F R Forums with some detailed installs, we were looking at those for ideas, for sure.
There are a couple good spots in our 235 so, access permitting, perhaps a larger tank.
The link / picture above from EDABEUT is a very good solution, especially for situations where space could be at a premium, i.e. the Original Poster's MH.
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Old 10-06-2016, 05:53 PM   #8
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Out of the 5 RVs we have owned, only one had a pulsating water pump. Very aggravating. I replaced the cheapo pump with a better one and the problem went away (no accumulator). I would think a new upgraded pump with an accumulator would definitely solve it.
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Old 10-06-2016, 06:25 PM   #9
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Some (but not many) pressure switches on TV water pumps can be adjusted to help eliminate the pulsing. Not sure what the OP has but they might check to see if possible.

Google ”adjust pressure switch RV water pump”. Lots of good information.
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Old 10-06-2016, 07:29 PM   #10
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The picture above showing the tank at Camping World indicates it is out of stock. Amazon has it available even at a lower price. I got one because my pump had minor pulsating but a tech advised me replace it. New pump fixed the pulsating and I'll get around to installing the accumulator this winter.

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