So I am attempting to install a pressure water system on my Oday 25 but I am not sure what to do with the waste water that drains from the sinks. I currently dont have any holding tanks and I dont think I want to run the waste water into the bilge. Any ideas on how this is normally done?
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like this
most drains are routed through a seacock and a thru-hull fitting that discharges just below the waterline. you would probably want to haul the boat to drill the thru-hull. however, a professional boat yard can do it without hauling the boat.
most drains are routed through a seacock and a thru-hull fitting that discharges just below the waterline. you would probably want to haul the boat to drill the thru-hull. however, a professional boat yard can do it without hauling the boat.
Catalina's Approach
Catalina on the C250 puts the drain thru the hull just above the water line. This still requires drilling a hole, but does not need a thru hull or to have the boat hualed. I guess if it leaks when heeled, you stop the boat and correct the problem. Good Luck
Catalina on the C250 puts the drain thru the hull just above the water line. This still requires drilling a hole, but does not need a thru hull or to have the boat hualed. I guess if it leaks when heeled, you stop the boat and correct the problem. Good Luck
Check Valve
I had a Catalina 25 that discharged sink drains and the ice cooler drain below the water line. The cooler "T"'d into the drain line. There was a check valve in the line for when the boat heeled that prevented sea water from backflushing in.
I had a Catalina 25 that discharged sink drains and the ice cooler drain below the water line. The cooler "T"'d into the drain line. There was a check valve in the line for when the boat heeled that prevented sea water from backflushing in.
Actually...
The thru-hull should be kept closed while underway. Relying on a check valve is risky.
The thru-hull should be kept closed while underway. Relying on a check valve is risky.
My two cents...
A sink drain should go down to a through-hull, not to a drain on the topside. First, you don't want your washwater dribbling down the side of your boat. Second, you want the sink to drain on either tack. Third, with the sink amidships, you'd still need a seacock on a topside drain, since it would be so near -- sometimes under -- the heeled waterline. Ideally, the sink is close enough to centerline that its bottom is above the waterline on both tacks, though that's hard to achieve on a small boat. I almost agree with Peggie, but not quite. The throughhull should be closed when the drain is not in use. I've washed many sets of dishes under way. It's much easier with the seacock open. ;-)
A sink drain should go down to a through-hull, not to a drain on the topside. First, you don't want your washwater dribbling down the side of your boat. Second, you want the sink to drain on either tack. Third, with the sink amidships, you'd still need a seacock on a topside drain, since it would be so near -- sometimes under -- the heeled waterline. Ideally, the sink is close enough to centerline that its bottom is above the waterline on both tacks, though that's hard to achieve on a small boat. I almost agree with Peggie, but not quite. The throughhull should be closed when the drain is not in use. I've washed many sets of dishes under way. It's much easier with the seacock open. ;-)
Peggie, why?
I've never closed a thru-hull for any trip. Why is traveling any more risky than sitting in one spot with the valve open. Is it because of the hose? Some of these new hoses will stop a bullet.
I've never closed a thru-hull for any trip. Why is traveling any more risky than sitting in one spot with the valve open. Is it because of the hose? Some of these new hoses will stop a bullet.
Because...
The pressure of the water against an open thru-hull can force water up the hose--an effect known as "ram water"--which can turn a sink (or a toilet on which someone has left the wet/dry dry valve in the "wet" mode") into a fountain. That it hasn't happened to you yet, doesn't mean it can't...all it takes for the sea condition, speed, and angle of heel to combine in just the right way.
The pressure of the water against an open thru-hull can force water up the hose--an effect known as "ram water"--which can turn a sink (or a toilet on which someone has left the wet/dry dry valve in the "wet" mode") into a fountain. That it hasn't happened to you yet, doesn't mean it can't...all it takes for the sea condition, speed, and angle of heel to combine in just the right way.
You're right, Russell...
"...except when the sink in use" is ok, even underway. Just don't leave the thru-hull open when the sink is "unattended" while underway unless the cabin sole needs mopping.
"...except when the sink in use" is ok, even underway. Just don't leave the thru-hull open when the sink is "unattended" while underway unless the cabin sole needs mopping.
Peggie, can't even imagine it.
At least with my boat. (and previous boats)(and friends' boats) nm
At least with my boat. (and previous boats)(and friends' boats) nm
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