What is an accumulator tank and do I need one?

What is an accumulator tank? How does an accumulator tank work? What are the advantages of using an accumulator tank? Here we'll walk through what an accumulator tank does and show you how they improve water flow and can even make a pump quieter.

Accumulator-tanks-explained 3:27

Video transcript:

Mike: Hi there. Welcome to this episode of Jabsco Tech. Today we're talking about accumulator tanks. Well, Paul, what is an accumulator tank?

Paul: This here is a Jabsco accumulator tank and what this is is a plastic housing. In the middle here we have a rubber diaphragm or bladder and then down the bottom is where the water flow goes. The top we also have a Schrader valve so we can put air into this to operate the system correctly.

Mike: What are they used for?

Paul: So what do you accumulator is used for is to stop pulsations of the pump and also to give the pump greater longevity, so it doesn't cycle as often. So the system can use the accumulator pressure before the pump kicks on.

Mike: So check this out. In some instances you'll have a big pump and a faucet that just can't keep up with that with that pump. So what we did is we installed a 4 GPM pump here and we're going to open up the faucet to get that pump that pump to start pulsating. Go ahead. 

Paul: Check it out. Pulsating. Bit more. And just about there is right where it’s pulsating.

Mike: See that means the pump is turning on and off real fast, you can almost hear the clicking with a pressure switch. That's not good for the pump. It's also loud, so I just wish there was some way that we can install an accumulator tank into the system. Can we do it?

Paul: I think we can do it, Mike. Just give us a couple of minutes and we'll take a look and get it done. Check it out. We got an accumulator tank in the system.

Mike: That's amazing. So same 4 GPM pump. Accumulator tank pressurized to?

Paul: 17 PSI, so this pump is a cut out pressure 40 PSI. A cut in pressure at 20 PSI. So you need to set the accumulator tank at 3 PSI below the cutting pressure of the pump.

Mike: Paul, be my guest please. 

Paul: Let's check it out. Slowly.

Mike: See right now the pressure is being drawn off the accumulator tank. The pump's not running. But once that pressure is exhausted, the pump turns on.

Paul: No pulsating, no splashing, and the pump is a lot quieter. The pump will run for a little bit just to build up pressure in the accumulator tank and then shut off.

Mike: Nice. Anything else that we need to know on this one?

Paul: No, I think that's a great test, Mike. It really showed from the start where it was pulsating, lot of splash, lot of noise, to an accumulator tank and a nice smooth running quiet pump.

Mike: One quick take away though, if you do go to go ahead and install one of these in your existing system, make sure you shut the pump off, disconnect the power, and open up your faucets to relieve any pressure. I know from experience that if you don't relieve that pressure and you take that little clip off, you’ll get wet. Anything else?

Paul: Nope, I’m all good. That's a great system.

Mike: Thanks a lot for watching this episode of Jabsco Tech. I'm Mike Irving.

Paul: And I'm Paul Campagna. 

Mike: We'll see you in the next video.