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Old 02-08-2023, 11:41 AM   #1
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Added an Accumulator Tank

Decided to add an accumulator tank to the system to soften the pump hammering. Install went as expected. Tested at home. Seems to make a difference in pressure consistency and pump running timing. We have not run the shower yet.



We have an outing scheduled for the end of Feb. I'll report back after using the setup for 4 or 5 days boondocking.



Cost less than $30 for the tank and a few hours of work.Click image for larger version

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Old 02-08-2023, 01:10 PM   #2
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How big of a tank did you go with?
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Old 02-08-2023, 01:20 PM   #3
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Ours was a 2 gallon that we bought at Menard's over in the well water department. I installed one not so much for the hammering (that I cured with flex hose off the pump), but so every little water use event didn't trigger the pump as in night time stool use. I made my own bracket.
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Old 02-08-2023, 01:22 PM   #4
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Just an FYI, you probably will have to replace that tank occasionally. I have reverse osmosis in my kitchen at home with a 3 gallon tank and the bladder eventually fails so I have to replace it. I can tell when it's time when I am filling my water bottle and I don't have the same pressure I had before. Not sure if that will be how you will know.

Not a big deal just something to let you know about.
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Old 02-08-2023, 04:55 PM   #5
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Originally Posted by ependydad View Post
How big of a tank did you go with?


It’s 25oz. About .2 of a gallon. It’s small. About the same size as the filter assembly I removed.
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Old 02-08-2023, 05:16 PM   #6
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Originally Posted by dieselguy View Post
Ours was a 2 gallon that we bought at Menard's over in the well water department. I installed one not so much for the hammering (that I cured with flex hose off the pump), but so every little water use event didn't trigger the pump as in night time stool use. I made my own bracket.
Same here. Not worried about the bladder failing. I have a much larger one at home that I replaced after 30 years because the metal around the base was badly rusted. The 2 gallon size is good for about 4 toilet flushes. Important for us because our pump is directly under the head of our bed.
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Old 02-08-2023, 08:20 PM   #7
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We installed a 2 gallon tank in our 2018 Sunseeker MBS and really appreciate how it smooths out the pump (less often and runs longer). We turn the pump off at night and have not had a problem running out of water before morning. And the wife really appreciates not being woke up in the night by the pump cycling whenever someone uses the bathroom.
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Old 02-08-2023, 08:48 PM   #8
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I installed a 1-gallon pressure tank in our TT. Sure smooths out the pump hammering and cycling.

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Old 02-08-2023, 10:47 PM   #9
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I have both a mini accumulator like the OP's and a 2 gallon well tank in my Sunseeker MH. The 2 gallon tank is valved to enable switching it in or out of the system as I desire. For their size, those mini accumulators do a good job of reducing pump cycling. Our pump has the so called bypass feature meant to reduce cycling, but that alone has only a marginal effect.
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Old 02-09-2023, 01:52 PM   #10
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Other than pump noise, what's the benefit to an accumulator tank?
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Old 02-09-2023, 02:41 PM   #11
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Originally Posted by ependydad View Post
Other than pump noise, what's the benefit to an accumulator tank?
It allows you to cycle a faucet or toilet valve several times without the pump running. (dependent on the size of the accumulator tank)

The accumulator "stores" pressure (and water) and allows water flow without cycling the pump until the pressure in the bladder inside the accumulator depletes.

Many folks like them because it keeps a pump (often located under a bed) from running when someone makes a early morning potty break.

They also help control high water pressure when the air pocket in the water heater depletes. It gives the expansion of the heated water somewhere to go instead of adding additional pressure to a water locked system.
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Old 02-09-2023, 03:11 PM   #12
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It allows you to cycle a faucet or toilet valve several times without the pump running. (dependent on the size of the accumulator tank)

The accumulator "stores" pressure (and water) and allows water flow without cycling the pump until the pressure in the bladder inside the accumulator depletes.

Many folks like them because it keeps a pump (often located under a bed) from running when someone makes a early morning potty break.

They also help control high water pressure when the air pocket in the water heater depletes. It gives the expansion of the heated water somewhere to go instead of adding additional pressure to a water locked system.
Thanks for the information. That was helpful.
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Old 02-09-2023, 03:31 PM   #13
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"what's the benefit to an accumulator tank?"

Nice warm showers! No more cold to hot, cold to hot alternating temperatures for shower water.

Bob
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Old 02-11-2023, 11:14 PM   #14
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I installed an accumulator during the summer of 2021 in my 5er. Works well as it smooths out the pump when it runs. Believe though it only holds maybe a 1/2 gallon at the most.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


Be safe -
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Old 02-12-2023, 06:33 AM   #15
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I installed an accumulator during the summer of 2021 in my 5er. Works well as it smooths out the pump when it runs. Believe though it only holds maybe a 1/2 gallon at the most.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


Be safe -
I have that model. Per the spec sheet total gas and liquid volume is only 21 ounces. A drawdown volume spec isn’t shown, but it would be less.
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