Fresh Water Pressure Pump Installation

[clivej]

I am planning on installing a fresh water pressure pump to feed the galley sink tap on my Sadler 25. I'm not sure how to go about it and can't find any resources on the internet to explain how it's done. Does anyone here know anywhere I can get some instructions?
Thanks

 

[VicS]

All you need is a pressure pump with automatic control, unless you want to fit a tap with a built in switch to operate the pump, and a suitable tap at the sink.

For just a single tap one of the smallest capacity pumps will be adequate

Choose a pump that does not require a pressure accumulator if you want to avoid the complication of fitting such a bulky item.

Plenty of info on the pump manufacturers' websites

 

[sarabande]

The ever=helpful West Marine have an article and diagrams, though as Vic points out modern pumps e.g. Jabsco ParMax, do not need a pressure accumulator.

There are a number of quick fit and Hep2O pipework layouts which make installing a system much much easier than of yore.

 

[clivej]

Thanks VicS and sarabande. I think this will be simpler than I thought (hopefully). Seems like I'll just need a tap and a pressure controlled pump then lead the + and - wires from the pump back to the switch panel.

 

[TQA]

Al you need is the simplest pump with an integral pressure switch. Plenty around for less than 20 quid.

 

[VicS]

Thanks VicS and sarabande. I think this will be simpler than I thought (hopefully). Seems like I'll just need a tap and a pressure controlled pump then lead the + and - wires from the pump back to the switch panel.

The pumps draw a few amps when running and quite a bit more initially The instructions should tell you what size fuse or circuit breaker to fit in the panel and what gauge of cable to use. It will be heavier than you'd expect in order to minimise volts drop.

If in doubt about the wiring post details of pump, esp the current it takes, and the length of the cable run from the panel to the pump.

 

[alahol2]

Our galley is fitted with a whale flipper pump. To 'pressurise' the system I installed a mini inline pump, eg http://www.tcschandlery.co.uk/whale-gp1392-inline-electric-galley-pump-13ltrmin-12v/p12271?gclid=Cj0KEQjwo-XIBRCOycL7hsuI_NoBEiQAuS6HtA4x_UFZZiU9PM3U3076UHGGGqmMPRwdj74EJXX4GkEaAqcd8P8HAQ, at the lowest point in the pipework and a switch by the sink. So, press the switch for 'pressurised' water, the inline pump pushes water through the flipper as though it were just a faucet. The flipper continues to work as normal if you are feeling energetic.

 

[johnalison]

My ancient cruising book suggests that you need a gallon of water per person per day. It then goes on to say that a woman will use twice as much and waste a further gallon. You will almost certainly use much more water with a pressurised system and I doubt if a Sadler 25 has a large enough tank to make it worthwhile. My old 29 used to have an 18 gallon tank, and that never lasted very long.

 

[clivej]

She has a 30 gallon water tank. I think the person that had her built must have planned some long voyages!
I like the idea of the inline pump alohol2 because one thing that has occurred to me is that if the pressure pump breaks than I have no water.

 

[temptress]

take a look here, relatively simple to install

https://www.jabscoshop.com/advice-and-support/jabscoshop-about-pressurised-fresh-water-pumps.htm

and

here: https://www.jabscoshop.com/marine/p...-0092-par-max-19-pressure-controlled-pump.htm

 

[clivej]

OK I have my pump - a ParMax 1 rated at 3A. I also have some wire which is 16/0.20. Distance to the switch panel is about 3m probably a bit less. Is that wire suitable do you think?

 

[Andrew_Trayfoot]

I fitted 2 Whale taps with built in micro switches, a relay, and inline pump. No current draw when not in use...
you can also get blue food grade plastic pipe and push fit connectors.

Make sure you have a way of draining the system in the winter.
Works a treat..

 

[VicS]

OK I have my pump - a ParMax 1 rated at 3A. I also have some wire which is 16/0.20. Distance to the switch panel is about 3m probably a bit less. Is that wire suitable do you think?

No! 16x0.20 is only 0.5mm². It has a max safe rating of 3amps but over the length of your cable run the volts drop will be too great. ( also strictly too light for the 4 amp recommended fuse) Use at least 1.0mm² or AWG 16.

 

[clivej]

No! 16x0.20 is only 0.5mm². It has a max safe rating of 3amps but over the length of your cable run the volts drop will be too great. ( also strictly too light for the 4 amp recommended fuse) Use at least 1.0mm² or AWG 16.

Thanks for your help. New wire purchased.

 

[vyv_cox]

Don't forget to install an inline strainer before the pump. This should be standard practice as it eliminates so many of the problems that people ask about on these forums.