Water Pump Pulsating

[jprosper]

I have a 2023 Thor Sequence. I removed the water filter and replaced it with an arced line of the blue tubing since I use an external filter and there were many reports of the internal filter leaking. (When we picked it up, there was water on the floor from it.)
The water pump worked fine until I removed the filter. Now it pulses and shakes while running the water and even after it has been turned off. I have removed all the air from the system, running all the faucets and showers until no air was there. It seems to occur more with hot water than the cold water. It happens only when using the tank water, since it doesn't run using city water.
Any suggestions? Thank you!

[DavidEM]

Put the filter back in. It smooths out the pump pulses which are normal. When you put it back in the circuit make sure the filter element is in place and the seal is aligned. It shouldn’t leak.

David

[ducksface]

We don't know if you removed a filter or the accumulator/pulse-pot tank.

[jprosper]

Put the filter back in. It smooths out the pump pulses which are normal. When you put it back in the circuit make sure the filter element is in place and the seal is aligned. It shouldn’t leak.

David[/QUOTE]

Thank you. I will put the filter back in and hopefully that will straighten it out.

[jprosper]

We don't know if you removed a filter or the accumulator/pulse-pot tank.[/QUOTE]

It was the filter that I removed.

[Dan-sr@perra-us.net]

The Water pump on my ACE pulses as well. It is also rather loud, I think the wet bay walls and floor act like a sounding board. Anyway, my unit does NOT have an accumulator, according to the Thor supplied documentation an accumulator is not needed. I am thinking the Thor line is rather a lot of I wish there was a Smilie for what I really want to say about that. So, I am considering installing an accumulator to try to reduce the volume and pulsing. Will installing an accumulator actually help?

[Beau388]

Originally Posted by Dan-sr@perra-us.net

The Water pump on my ACE pulses as well. It is also rather loud, I think the wet bay walls and floor act like a sounding board. Anyway, my unit does NOT have an accumulator, according to the Thor supplied documentation an accumulator is not needed. I am thinking the Thor line is rather a lot of I wish there was a Smilie for what I really want to say about that. So, I am considering installing an accumulator to try to reduce the volume and pulsing. Will installing an accumulator actually help?

Yes, an accumulator will USUALLY help. The problem is the cold water line from the pump is not tied down or insulated. The easiest fix is to buy some pipe insulation and place as short section where the cold water lines hit the shower wall or the floor.


A high pressure, large volume pump takes a large accumulator. If the pump is less than 3 g/m as small accumulator should be sufficient.

[happy]

Ours pulses more and with greater intensity if we have any sediment in a facet screen.

Moving the filter could have dislodged some debris that got caught in the facet spigot screen.

[The Gritz Carlton]

The only benefit to an accumulator is for short burst of water. The really big ones are more effective but who has room for that. It will not cut back on how much the pump runs overall per gallon used. The output still has to "fill" and pressurize the accumulator after you use water.

[Dan-sr@perra-us.net]

Originally Posted by Beau388

Yes, an accumulator will USUALLY help. The problem is the cold water line from the pump is not tied down or insulated. The easiest fix is to buy some pipe insulation and place as short section where the cold water lines hit the shower wall or the floor.


A high pressure, large volume pump takes a large accumulator. If the pump is less than 3 g/m as small accumulator should be sufficient.

Define "small" most of the accumulators run between 0.75 L and 1.0 L. My pump is supposed to be a 3GPM unit.

[Geterdun]

Originally Posted by Dan-sr@perra-us.net

Define "small" most of the accumulators run between 0.75 L and 1.0 L. My pump is supposed to be a 3GPM unit.

Expand your horizons:



https://www.amazon.com/Accumulator-M.../dp/B00IRFW38W

[Dan-sr@perra-us.net]

Originally Posted by Geterdun

Expand your horizons:



https://www.amazon.com/Accumulator-M.../dp/B00IRFW38W

TWO GALLONS! I do not think there is room for a two-gallon accumulator tank in my wet bay or anywhere else in a weather protected location inside a heated area without running a ton of new pipe.

[Jimbo56]

Water pumps pulse. Even home well systems do as well. Mine beats against the floor. It really doesn’t bother me enough to go through the effort of removing drawers, twisting my body to get to it, then trying to wrap something around 3” of pex to cushion it from beating against the floor. It doesn’t leak. It works properly. I’ll fix it when it breaks.

[PreCambrian]

Originally Posted by jprosper

I have a 2023 Thor Sequence. I removed the water filter and replaced it with an arced line of the blue tubing since I use an external filter and there were many reports of the internal filter leaking. (When we picked it up, there was water on the floor from it.)
The water pump worked fine until I removed the filter. Now it pulses and shakes while running the water and even after it has been turned off. I have removed all the air from the system, running all the faucets and showers until no air was there. It seems to occur more with hot water than the cold water. It happens only when using the tank water, since it doesn't run using city water.
Any suggestions? Thank you!

Unless the filter had air trapped in it, it just acted as a hydraulic restriction. You could put in another restriction such as an adjustable globe valve to duplicate the restriction of the filter. Something downstream of the filter doesn’t like the pressure pulsations. Almost all types of positive displacement pumps have pulsations.

[lwmcguire]

Hydraulic damper with pex fittings are available in all big box stores

Easy to add in home or camper

[Galobo]

Not sure about your pump but our pump had an adjustment near the end of the motor close to the filter. The adjustment was made with an Allen wrench and the adjustment was very slight and it stopped the pulsing of the pump.