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29 Posts
Hi all,
I am replacing the bilge pump system and thru hulls on my boat and need some advice and or thoughts. I know all about back siphoning and the need to have a riser loop and anti siphon vent but have no room in the boat to put in such an assembly. What to do?!!
This is a small boat, a 1985 gloucester 20, with an interior layout very akin to say a Precision 21. With out cutting holes in the inner pan and hanging a vented loop/valve in the V birth I am curious what a good solution would be. I am not so sure that this is common on smaller boats where space is a premium. Also, well aware that a one way check valve is a terrible idea so thats out.
The thru hulls (one for sink, the other for bilge discharge) are under the sink to port and are about 4-6 inches above the waterline (not ideal) so certainly submerged on a tack. Being under the sink, there is limited space to put a loop of any capacity on the bilge line from the pump and as one would image no matter what you did under the sink it wouldn't be above the water line on a tack unless I miraculously learn to sail without heeling. lol.
The old routing was a disaster waiting to happen I fear, with the hose going directly down and straight into the bilge with no rise what so ever. I am scared of back siphoning and sinking.
Thoughts on what to do or perhaps some folks can chime in about the systems they use on smaller boats with limited space?
Thanks,
-G20
I am replacing the bilge pump system and thru hulls on my boat and need some advice and or thoughts. I know all about back siphoning and the need to have a riser loop and anti siphon vent but have no room in the boat to put in such an assembly. What to do?!!
This is a small boat, a 1985 gloucester 20, with an interior layout very akin to say a Precision 21. With out cutting holes in the inner pan and hanging a vented loop/valve in the V birth I am curious what a good solution would be. I am not so sure that this is common on smaller boats where space is a premium. Also, well aware that a one way check valve is a terrible idea so thats out.
The thru hulls (one for sink, the other for bilge discharge) are under the sink to port and are about 4-6 inches above the waterline (not ideal) so certainly submerged on a tack. Being under the sink, there is limited space to put a loop of any capacity on the bilge line from the pump and as one would image no matter what you did under the sink it wouldn't be above the water line on a tack unless I miraculously learn to sail without heeling. lol.
The old routing was a disaster waiting to happen I fear, with the hose going directly down and straight into the bilge with no rise what so ever. I am scared of back siphoning and sinking.
Thoughts on what to do or perhaps some folks can chime in about the systems they use on smaller boats with limited space?
Thanks,
-G20