Bilge Pump Plumbing
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Bilge Pump Plumbing

  1. #1
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    Default Bilge Pump Plumbing

    I am installing 3 auto bilge pumps in the back of a Sanger hydro. Can the drain lines be teed together, or do I need 3 separate drain lines going through he transom?

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    Since fluid is lazy, unless you have directional valves in lines to keep the fluid from falling into the other pumps,I would say individual dumps. but you could have a nice piece made with three separate exit holes, that would only mean one hole in the transom.

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    How about adding (3) one-way check valves??????
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    Without a boat hondoboat's Avatar
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    Just out of curiosity why 3 bilge pumps?

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    I was going to put one bilge pump in each stringer bay. That would give me about 30 gpm extraction rate. Is this overkill? I really would prefer using just one pump, but how do you get water out trapped by a stringer?

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    Personally, after having been swamped and nearly swamped on more than one occassion due to a roller over the back, I like the triple pump idea. Most of the time you won't need it, but those times you do, oh boy.

    As to alternative plans, alot of factory boats have holes in the stringer down low to connect the bays, although that is kind of sub-optimal as it invites rot. My buddy has had good luck with flappers instead of plugs- as long as you keep the boat clean and keep tabs on them they seem to work great. Last, you could just keep the pump mobile, so that you can move it to the sides if you need it.
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    Quote Originally Posted by Spudpilot View Post
    How about adding (3) one-way check valves??????

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    If you are going to merge 3 lines be sure the flow is not reduced by going to just one dump. Might want to consider putting a pump in each sponson . The flappers can be held open by even a pine needle and will let in a lot of water way too fast. You cant have too much pump capacity in a hydro and don't restrict it in any way. I always have a float attached to 50 feet or so of parachute cord tied to some point on the stringer in case you don't have enough pump capacity someday.

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    Quote Originally Posted by hondoboat View Post
    Just out of curiosity why 3 bilge pumps?
    If and when you need a bilge pump three sounds about right. Ya can't have too many far as bilge pumps go. If you get a roller over the transom a flat bottom boat can fill up really fast. I like the three separate dumps too.

    Steve

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