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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #1  
Old 03-20-2010
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Accumulator or Pump?

My fresh water system accumulator has a hair-line crack.

I was simply going to replace but looking now looking at a replacement pump 'No accumulator required'

My pump is working fine but is many years old so it would be prudent to replace now at around the same price as an accumulator.

So for the same price as replacing my accumulator I could have a new pump.

My question, is it better to have an accumulator in the system? I have been told you get better flow with less power consumption.
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Old 03-20-2010
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Having an accumulator in the system will make the system less noisy and more reliable. If the old pump ain't broke, don't replace it.
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Old 03-20-2010
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I can't say if using an accumulator with your set up will consume less power, but one advantage is you can have pressure, for a while, without the need to run a pump. The larger the accumulator the longer you can not run the pump once fully charged.
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Last edited by nickmerc; 08-18-2011 at 07:14 AM.
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Old 03-20-2010
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I really like the newer variable speed pumps. They are quieter and provide an even flow of pressure without the surges of the older pumps. IMO they remove the need for an accumulator.
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Old 03-20-2010
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I lived aboard for around 20 years using tank water for taking showers the whole time without an accumulator tank. The boat came new with a Jabco diaphram water pump and lasted over 7 years and at that time I replaced with a cheaper Shurflo automatic pressure water which lasted just as long and I really didn't notice the noise factor. The accumulator tank would mean less cycling of the pump and maybe smoother operation, but I wasn't bothered by the set up that I had.
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Old 03-20-2010
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Agree with HerbDB. I replaced a pump with a "new" -at the time- VSD pump. You can then bypass or discard the accumulator and its periodic diaphragm leaks altogether. The pressure and response of the VSD are as good as the old system. I can hear the pump when it runs, but no more so than the old pump.
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Old 03-20-2010
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i made a accumulator out of some pvc, it has no diaphram but it works. it does need to be drained and allowed to fill with air every so often but it does cut down on the pump cycling. cost less than 10 bucks
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