Fitting Bilge pump

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micheal.walsh
Fitting Bilge pump

I am in the process of fitting a bilge pump on my 26X. My plan is to install it aft of the sink area. I am not sure where to position the through hull fitting. Can anyone advise on this please? I am concerned that water might come in through it when the boat heels.

Regards,

Micheal Walsh

Micheal Walsh

rick.jones
rick.jones's picture
Hi Micheal

Hi Micheal

The simplest would be to tee it into the sink drain, which is high enough to be safe when heeled. You would need to connect it using a one-way (non-return) valve, otherwise you would end up draining the sink into the bilge! Or if you prefer to fit a separate through-hull, use the height of the sink drain as a guide.

A bigger problem is that one pump is not enough, because the ballast tank splits the bilge space in two, and you need a pump each side. Otherwise you will only pump out the port side. On the starboard side you could do the same thing and tee into the sink drain in the head.

Rick Jones (Treasurer) 1994 Mac 19 "White Lightning", Isle of Wight

micheal.walsh
Hi Rick,

Hi Rick,

Thanks for the advice. I didn’t realise that the bilges were split!! The sink outlets seem to be just above the water line. Will that be OK??

Micheal Walsh

rick.jones
rick.jones's picture
Hi Micheal

Hi Micheal

Well I've never heard of a 26 flooding through the sinks! And so long as you use a non-return valve, then it can't flood directly into the bilge either.

If you decide to add your own thru-hulls, rather than tee in (arguable which is easier), then you can probably fit them higher, and if you also use non-returns you're safe both ways.

Rick Jones (Treasurer) 1994 Mac 19 "White Lightning", Isle of Wight

rick.jones
rick.jones's picture
I've just checked the valve I

I've just checked the valve I fitted to my own pumps, it's a Whale LV1219. Readily available on eBay, this page shows a choice of items:

https://www.ebay.co.uk/p/Whale-In-line-Non-return-Valve-Lv1219/1900428377

Fits 3/4" inlet hose, and 3/4" or 1" outlet.

Rick Jones (Treasurer) 1994 Mac 19 "White Lightning", Isle of Wight

micheal.walsh
Hi Rick,

Hi Rick,

Much appreciate. Will go with using existing openings.

Micheal Walsh