Shower drain below water line
- Thread starter scott754
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You are correct. Above the waterline IS better... less complex and one less seacock. The scum and water shooting out the side are only issues for marina queens; boats that spend 90% of the time in marinas.
As I slowly rebuild my 27 and having added a shower sump to handle ice box and galley sink drainage I think I still disagree. Below the waterline should still be preferred.
For most installations where you have a discharge near the waterline a seacock is still advisable. Consider back-flow on a hard heel. Consider it a hole in the hull that could be below the waterline in a sinking event.
You have a pump anyway with the sump right? You have a hole in the boat right? Vented loop?
All systems in front of the hole in the boat don't care. The hole in the boat should have a means of closing it.
You might as well save the cosmetic maintenance issue. I for one don't want a hair-ball hanging out of a hole in the boat where others could see it, marina queen or not. I think Catalina made the right choice.
For most installations where you have a discharge near the waterline a seacock is still advisable. Consider back-flow on a hard heel. Consider it a hole in the hull that could be below the waterline in a sinking event.
You have a pump anyway with the sump right? You have a hole in the boat right? Vented loop?
All systems in front of the hole in the boat don't care. The hole in the boat should have a means of closing it.
You might as well save the cosmetic maintenance issue. I for one don't want a hair-ball hanging out of a hole in the boat where others could see it, marina queen or not. I think Catalina made the right choice.
The C36 takes the output from the shower sump up to the sink drain line (above the water line to make a siphon break) and down to a closeable through hull below the water line. The vented loop above the water line and the closed through hull while sailing are both important.
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