Where to put Thru hull for Bilge Hose

[rtpassini]

The boat i bought never had a bilge on it, so im installing one.
Ive never had the boat in the water so i dont know where the water line is.

how far down from the rub rail should i put the fitting?

 

[22E6441]

Re: Where to put Thru hull for Bilge Hose

Just drape it over the stern for now.

Water test it with your usual load before you figure where you want to put it.

You don't mention what kind of boat....my 14' runabout simply has the hose dropping water into the splash well....the existing thruhull drains do the work for me.

 

[Mark42]

Re: Where to put Thru hull for Bilge Hose

Idealy, the through hull will be at a height that is above the water line, but also allows the bilge hose to rise up hill before turning down to the pump. That rise in the hose keeps water from entering the boat even if waves splash against the sides.

Common practice amongst boat companies is to put the bilge thru-hull on the same side as the helm, so the Captain can easily see if water is being pumped or not.

I'm putting the bilge thru-hull about 3" above the splash well height. That leaves about 6 inches for a rise before turning down to the pump. If Im lucky, my hand will be able to reach into the back corner of the transom on the helm side to tighten the thru hull fitting. I can't see in there, its a blind reach, but would be worth it to have the discharge out the side rather then through the transom.

 

[arks]

Re: Where to put Thru hull for Bilge Hose

You don't say how big the boat is, but if it's a small tinny I suggest you install the outlet thru the hull as high as possible.
When I added a pump to my 14' Jonboat I put the discharge port at the stern just under the rubrail. 2 years no problems.

Mark makes a good point- if possible the hose should have a loop that's higher than the outlet in case it's ever submerged.