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Old 03-11-2019, 03:29 PM   #1
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Brand: Thor Motor Coach
Model: Four Winds 28z
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Water pump recommendations

Our water pump in the Class C 28z sounds awful- surging and knocking all over the place. I know it is a PIA under the bed so I want to be ready before going in 2-3 times. Recommendations on a new pump and accumulator?

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Old 08-23-2020, 04:29 PM   #2
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and again recommendations

Quote:
Originally Posted by lazinskm View Post
Our water pump in the Class C 28z sounds awful- surging and knocking all over the place. I know it is a PIA under the bed so I want to be ready before going in 2-3 times. Recommendations on a new pump and accumulator?
Wow? so long and no recommendations? I guess everyone that replaces it has it done? I saw this Title, and thought oh great, I can see what people are using. I too would like some recommendations, but if not I'll just read the internet
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Old 08-23-2020, 05:28 PM   #3
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I had a Shurflo pump cease and had it replaced under warranty , the dealer who installed it also mounted it on a mouse pad for sound deadening and that did make it quieter. You are lucky where your pump is located mine is in a compartment behind a door with two screws and very difficult to check the strainer and the other odd thing is that the slide controller is in the same compartment, I just hope nothing goes wrong as I would have to take out the outside shower to get at the controller.
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Old 08-23-2020, 05:34 PM   #4
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Originally Posted by Coveman2 View Post
I had a Shurflo pump cease and had it replaced under warranty , the dealer who installed it also mounted it on a mouse pad for sound deadening and that did make it quieter. You are lucky where your pump is located mine is in a compartment behind a door with two screws and very difficult to check the strainer and the other odd thing is that the slide controller is in the same compartment, I just hope nothing goes wrong as I would have to take out the outside shower to get at the controller.
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Wow! and I thought mine was in a bad spot, being all around the heart of the electrics and electronics. Thanks for the reply, I like the mouse pad idea.

Mine is to the side of the picture and look what's all around it!
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Old 08-23-2020, 05:38 PM   #5
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Mine is in the wet bay, and is super easy to access.
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Old 08-23-2020, 06:12 PM   #6
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I have used SHURflo pumps for years, usually just the basic model with good results

Carried my spare now for 5 years and still don't need it and luckily it is in the wet bay but in a fairly tight spot

They have the higher capacity and super quiet models also
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Old 08-23-2020, 06:46 PM   #7
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In my Vegas, Thor installed the water pump with a solid piece of pipe directly from the pump. When it failed and I bought a SureFlo, the directions said to install it with a piece of flexible hose between the pump and the pipes. Made a world of difference in noise and vibration and longer life.
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Old 08-23-2020, 06:49 PM   #8
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Originally Posted by Oneilkeys View Post
In my Vegas, Thor installed the water pump with a solid piece of pipe directly from the pump. When it failed and I bought a SureFlo, the directions said to install it with a piece of flexible hose between the pump and the pipes. Made a world of difference in noise and vibration and longer life.
Interesting, mine does have a braided tubing between the tank and the suction strainer screws into the pump suction

Makes sense to have a bit of vibration dampener instead of a sounding board
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Old 08-23-2020, 07:02 PM   #9
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Related:
Our water pump doesn't make enough noise bother with
But
I have a in line fuel pump(it's almost exactly like a water pump but smaller) on one of my machines which went from rattling the rafters to all but silent by suspending it in a bungie cord sling.
No sounding board, no sound.

The mouse pad is an excellent start.
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Old 08-23-2020, 08:02 PM   #10
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Quote:
Originally Posted by lazinskm View Post
Our water pump in the Class C 28z sounds awful- surging and knocking all over the place. I know it is a PIA under the bed so I want to be ready before going in 2-3 times. Recommendations on a new pump and accumulator?

You have two options...
1) replace the pump
2) repair the pump (normally the diaphragm goes bad and the motor is still good)
I did both so that I now have a replacement

I’ve attached the Parts for a Vegas/Axis below that can be found on Amazon, but yours looks to be the same:

SHURflo-Revolution-Water-Pump-4008-101-A65

SHURFLO-94-800-01-Water-Valve-Assembly

PS ~ and while you’re at it, suggest that you add an accumulator tank. It’ll be the best mod you’ve made. Keeps the water flowing smoothly with less pump run time.
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Old 08-23-2020, 09:00 PM   #11
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Quote:
Originally Posted by lazinskm View Post
Our water pump in the Class C 28z sounds awful- surging and knocking all over the place. I know it is a PIA under the bed so I want to be ready before going in 2-3 times. Recommendations on a new pump and accumulator?
https://www.amazon.com/SHURFLO-94-59.../dp/B000WN5F96
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Old 08-23-2020, 09:31 PM   #12
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water pump / accumulator

OK, so I am now not fully convinced it is my pump. I have more of a hammering when I turn any water on. I have an accumulator, had it for about a year now, so perhaps I'll install that first to see if the hammering stops. A pump that I looked at is about 90.00 so the accumulator I have, I'll try it first. OH, and I noticed that my existing pump has no flex hose neither side in or out. So perhaps I'll add a flex hose as well. In the manual it even says to install a flex hose on both sides. Hmmm, guess that was an oversight.
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Old 08-27-2020, 08:34 PM   #13
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OK, so it turns out that I do not need a water pump. I installed the accumulator yesterday. Filled my tank with water. Put some paper towels under my fittings that I made (best way to check for leaks) and turned it on. No leaks and best of all ALL hammering is gone! Sounds better than the day I bought it! Thanks all who contributed.
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