Fresh water pump recommendations

[lanerboy]

Can anyone recommend a nice quiet 12v fresh water pump, when I turn a tap on mine sounds like a jack hammer starting up, the one in my motorhome is not noisy like the boat one. Not sure what make it is and I'm not on the boat but will have a look next time I'm down

 

[rafiki_]

Can anyone recommend a nice quiet 12v fresh water pump, when I turn a tap on mine sounds like a jack hammer starting up, the one in my motorhome is not noisy like the boat one. Not sure what make it is and I'm not on the boat but will have a look next time I'm down

Jabsco tend to pulse and hence are noisy. The Azi has an Italian pump with an impeller to pump. Is very quiet. There are options.

 

[wonkywinch]

Post in thread 'Beneteau Plumbing - quality control'

29 Aug 2025

I recently had cause to peer down one of those white handled 1/4 isolation cocks in your photo 1, and was horrified to see how much restriction they cause, even fully open. This wouod cause noise.
I Plan to change mine over winter.

Photo 2. That valve with the black lever looks like the pressure RV to me?

What do you think all that blue plastic junk is? I wonder how much of that you’ve inadvertently consumed?

I would agree that it seems odd to fit an NRV just downstream of the pump suction.

The PRV has an arrow on it, so a combined NRV/PRV?

There was the pump mesh filter then...

• wonkywinch

Before 68db ..



After 59 db ..

 

[lanerboy]

Also with my pump when I turn a tap on the water pressure lowers as the tap runs then the pump kicks in for a few seconds builds the pressure back up then the pump turns off untill the pressure drops again then the pumps kicks i again etc etc etc, is this normal as the pump in my motorhome is constantly on whilst the tap is open but it's way quieter than my boat pump

 

[Dogone]

I recommend the Marco pumps. Inbuilt pressure and flow regulator with no accumulator. Not silent, but quiet.

 

[wonkywinch]

Also with my pump when I turn a tap on the water pressure lowers as the tap runs then the pump kicks in for a few seconds builds the pressure back up then the pump turns off untill the pressure drops again then the pumps kicks i again etc etc etc, is this normal as the pump in my motorhome is constantly on whilst the tap is open but it's way quieter than my boat pump

No, and not good for the pump.

Do you have an accumulator? If so, is it pressurised? To check it, pump switched off, tap open, use tyre pump to check/pressurise to c 3 bar (operating pressure on label or pump mamual).

Next, adjust pump shut off pressure, usually c 2mm allen bolt in bottom of pump between inlet and outlet hose. Pump switched on, tap open, adjust pressure setting so pump just runs continuously.

 

[Fredd]

I replaced my Jabsco water pump with a Marco this year and it’s a lot quieter, can still be heard but it’s a different kind of sound . I left my accumulator installed and it works fine with it .

 

[rafiki_]

Also with my pump when I turn a tap on the water pressure lowers as the tap runs then the pump kicks in for a few seconds builds the pressure back up then the pump turns off untill the pressure drops again then the pumps kicks i again etc etc etc, is this normal as the pump in my motorhome is constantly on whilst the tap is open but it's way quieter than my boat pump

Is your accumulator pressurised?

 

[markc]

I have a couple of Gianneschi pumps and they are very quiet. Both have accumulators but I believe the current models don't need them. They are not cheap but you can find some very good deals if you shop around. Brilliant quality

 

[rafiki_]

I have a couple of Gianneschi pumps and they are very quiet. Both have accumulators but I believe the current models don't need them. They are not cheap but you can find some very good deals if you shop around. Brilliant quality

Yep, they have a great rep.

 

[Skipper Felice]

Last month I had to replace my old water pump - was a 12 year old Jabasco xyz ... pressure sensor was dead.
I have installed the best thing around Italy: MARCO ... very robust, no plastic, quit, electronic regulation, 12/24 V:

 

[applebadger]

I fitted a Shurflo Trail King 10 on my liveaboard, along with a 5 litre accumulator which reduces cycling. I also run the pressure switch via a relay so it doesn’t have to deal with the motor current.

Lasted 5 years so far, pumped around 100,000 litres of water by my estimation and still working great.

 

[Dogone]

Last month I had to replace my old water pump - was a 12 year old Jabasco xyz ... pressure sensor was dead.
I have installed the best thing around Italy: MARCO ... very robust, no plastic, quit, electronic regulation, 12/24 V:

View attachment 198809

I’ve got the double pump version of that for higher flows. I’ve got 4 heads. (With a single pump in parallel as backup). A good system.

 

[lanerboy]

No, and not good for the pump.

Do you have an accumulator? If so, is it pressurised? To check it, pump switched off, tap open, use tyre pump to check/pressurise to c 3 bar (operating pressure on label or pump mamual).

Next, adjust pump shut off pressure, usually c 2mm allen bolt in bottom of pump between inlet and outlet hose. Pump switched on, tap open, adjust pressure setting so pump just runs continuously.

Not sure if I have an accumulator, going to the boat tomorrow so will have a look

 

[markc]

Worth taking into consideration the flow rates as well as PSI ratings for pumps. Our main pump is 45 l/min which feels like overkill - that could drain our 800 litre tank in less than 20 minutes (about how long I would spend in the shower if the hot water didn't run out)

 

[MapisM]

Our main pump is 45 l/min which feels like overkill

You'll never get that flow out of a single tap.
The pump is sized that way just to cope with potential "parallel" uses in different cabins and galley.

 

[markc]

You'll never get that flow out of a single tap.
The pump is sized that way just to cope with potential "parallel" uses in different cabins and galley.

yes, I realise that, but an incredible amount of water does come out of the showers!

 

[MapisM]

Well, better than the other way round, anyhow.
You can always reduce a strong flow, but not increase a poor one...

 

[Dogone]

yes, I realise that, but an incredible amount of water does come out of the showers!

Not that much in boats usually. I measured it in my bathroom only yesterday as my sump pump is bust and the new one needed to be sized to suit. I have a rather wet rainfall type shower and it uses 11 litres per minute. My normal heads are 8 litres per minute. Most boat showers will be a bit less, at 5 or 6 especially if they have a flow restrictor or aerator device fitted.