My Pearson 303 does not have a shower sump, I want to install one I am leaning towards an Attwood 4141 if it fits in my bilge. I think I will pump out at the transom. My question is do I need a vented loop or a loop in the discharge hose before the through hull or run the hose straight to the thru hull? Being that I don't have to worry about heeling over on this type of install I don't think I need any loop. If the transom ends up low enough in the water to allow water to enter the shower sump discharge hose I think I will have bigger problems than the shower sump! Any good ideas. Thanks
Shower Sump install
- Thread starter GarEi
- Start date
Why not just T it into the sink drain instead of running to the transom?
No, you will not need a vented loop if the hose exits high enough that so that it does not get submerged.
No, you will not need a vented loop if the hose exits high enough that so that it does not get submerged.
Yes, if you leave the sink drain closed, otherwise the open drain in the sink acts as vent. The T does have to be above the waterline or it will back fill. The vented looped is to break a siphon. With an open drain the siphon can't form.
Gar, as an option to the sump system, you might want to consider the Whale IC referenced here:
https://forums.sailboatowners.com/index.php?threads/h340-grey-water-management.186525/#post-1387947
Has worked great for me since installation! As the air conditioning condensate tends to be a drip-drip-drip and causes too much pump cycling, I just turn the pump on periodically and when using the shower.
https://forums.sailboatowners.com/index.php?threads/h340-grey-water-management.186525/#post-1387947
Has worked great for me since installation! As the air conditioning condensate tends to be a drip-drip-drip and causes too much pump cycling, I just turn the pump on periodically and when using the shower.
Thanks for all the suggestions, I don't think I can tee into the sink drain but I will take a look. The vented loop might be a problem, not much room. The boat had a shower sump pump mounted in port settee which was removed and the thru hull used for the bilge pump. I think the Whale IC might work there but again space is very tight. The biggest decision is the thru hull which must be done before launch the rest can be done in the water.
No DL the bilge discharges above the water line. I think I will put a thru hull near the bilge discharge and install a Whale Gulper 220 pump for the shower. I need to take some measurements.
That sounds like a good plan. If I recall correctly, many Pearsons have a cored hull. Be sure to seal the balsa core when you poke a hole into it and put the discharge high enough to keep it out of the water even when heeled.