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Shurflo Pump Pulsing


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#1 lylefikse

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Posted 19 April 2013 - 07:56 PM

Our pump pulses when using either sink or the shower.  Water pressure goes up and down.  Works fine when flushing the toilet ( runs all the while, no pulsing).  There is a filter under the kitchen sink.  Think it could be plugged?  Suggestions. 


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Lyle and Linda Fikse

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#2 desertdeals69

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Posted 19 April 2013 - 08:33 PM

Did this just start or has it always done it?  What model do you have?


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#3 DickandLois

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Posted 19 April 2013 - 08:36 PM

Our water pump pulses when the demand is below the pumps maximum flow rate.

 

Rich.


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#4 desertdeals69

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Posted 19 April 2013 - 10:11 PM

I have a variable speed Shurflo.  Low demand motor runs slow.


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#5 desertdeals69

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Posted 19 April 2013 - 10:12 PM

Our water pump pulses when the demand is below the pumps maximum flow rate.

 

Rich.

Use a tank and it won't pulse.


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#6 wolfe10

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Posted 20 April 2013 - 07:25 AM

Yes, an accumulator will solve the pulsing.


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#7 lylefikse

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Posted 20 April 2013 - 10:07 AM

Desertdeals69-  It just started.  We had a nice flow rate before.  Pressure now is very low.  

 

Brett-  What is an accumlator?  And where does it go?


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#8 wolfe10

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Posted 20 April 2013 - 01:08 PM

Lyle,

 

They come in different sizes/capacities and install close to the pump on the pressure side.

 

Here is one: http://www.pplmotorh...r-pump-tank.htm


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#9 DickandLois

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Posted 20 April 2013 - 04:07 PM

Lyle,

 

You might need to clean the pump head valves and use a little plumbers grease on the valves and sets. When they get a little dirty and gummed up they do not seal well, so the pressure and volume of water drops off.

One can find new pump heads for many of the pumps.

 

I fix most everything I can or at least try, but I do like to tinker with things more them most.

Always figure that if it's not working, can not do to much harm; I might learn something or get lucky and fix it !!!

 

Still a 5 year old at heart, just never got over asking why ?

 

Rich.


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#10 desertdeals69

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Posted 20 April 2013 - 05:04 PM

Desertdeals69-  It just started.  We had a nice flow rate before.  Pressure now is very low.  

 

Brett-  What is an accumulator?  And where does it go?

Shurflo makes an accumulator which tees at the outlet of the pump. 

 

It works with a cushion of air at the top to smooth out the flow.

 

I would rebuild the pump with a kit or replace it.


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#11 lylefikse

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Posted 21 April 2013 - 07:02 PM

Thanks.  We should be home in about 3 days.  I'll get a kit and rebuild the pump then.  Do those come from surflo or aftermarket?


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#12 desertdeals69

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Posted 21 April 2013 - 07:19 PM

You will find the parts you need at most rv parts store.  Just have the model # with you.


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#13 lylefikse

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Posted 21 April 2013 - 07:44 PM

Thanks


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#14 lylefikse

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Posted 01 May 2013 - 09:23 AM

After cleaning the little screen filter before the pump, it works much better.   I thought maybe we had run the pump dry and done damage to it as it was turned on one night this winter by accident when the tank was empty.  After checking on Shurflo's website, I see our pump is make to run dry without damage.  I have ordered the shurflo accumulator also and will install it when it arrives.  Hope that will improve the flow even more.  Does it tell you how much air to put in the tank?  Hard to find correct method  to determine this online. Our pump is a Shurflo Model # 2088-422-144 Classic 2.8 GPM OEM.


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#15 JimPeoria

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Posted 01 May 2013 - 01:21 PM

Accumulator comes pre charged and you should not have to fool with that side of the unit. It will not make any difference to the flow volume just reduces the surges. And makes it so the pump doesn't have to start at the moment water is turned on.

 

Good investment in any water system motorhome or brick and mortar house.


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#16 lylefikse

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Posted 08 May 2013 - 06:45 PM

Installed accumulator  today.  Seems to work better.


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#17 desertdeals69

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Posted 08 May 2013 - 10:25 PM

Accumulator comes pre charged and you should not have to fool with that side of the unit. It will not make any difference to the flow volume just reduces the surges. And makes it so the pump doesn't have to start at the moment water is turned on.

 

Good investment in any water system motorhome or brick and mortar house.

The accumulator for rvs does not come with air pre charge.  The air in the chamber is compressed with the water.  In a home/farm unit, the tank has a rubber bladder which on the air side a predetermined amount of air pressure.  This is used with a well pump.


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#18 lylefikse

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Posted 10 May 2013 - 09:56 PM

Mine said right on it that it was pre-charged to 30 lbs


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#19 lylefikse

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Posted 24 May 2014 - 10:34 AM

Getting ready to use the motorhome on a long trip again and will be on the pump often.  Over the winter we were hooked up to city water.  I believe the accumulator tank has helped but think our main problem is sediment in the fresh water tank.  If I blow out the line from the pump it works well for a short time and then seems to have problems again.  Must be a screen on the line inside the tank.  Can't figure out how to get the tank clean enough to solve the problem.  Suggestions?


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Lyle and Linda Fikse

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