Peggy My head currently drains directly to the holding tank, which then drains to a T-fitting where one side goes to the deck pump out and one side goes to a macerator to pump out the tank to the sea. I am thinking of putting a Y-valve between the head and the tank so I could pump directly overboard and bypass the tank. Two questions, do I need a vented loop for the hose going overboard from the Y-Valve? Do I need a separate pump for this line, or will the pump of the head pump the waste overboard? Thanks Chuck "Calm Cruiser"
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Yes and No, Chuck
Yes, you will (likely) need a loop and siphon break after the Y valve, which I presume will discharge to another through hull. Or are you going to try to push it through the 1" macerator through hull via a T-fitting and reducer(I wouldn't)? No, you won't need a seperate head pump to use the overboard discharge. THe head pump will do just fine. RD
Yes, you will (likely) need a loop and siphon break after the Y valve, which I presume will discharge to another through hull. Or are you going to try to push it through the 1" macerator through hull via a T-fitting and reducer(I wouldn't)? No, you won't need a seperate head pump to use the overboard discharge. THe head pump will do just fine. RD
Yes...and no
Yes, you do need a vented loop between the y-vavle and the thru-hull. No, you don't need a separate pump. If the toilet is capable of pumping waste into the tank, it SHOULD be able to pump the waste overboard unless you're planning to use a thru-hull further away from the head than the tank is.
Yes, you do need a vented loop between the y-vavle and the thru-hull. No, you don't need a separate pump. If the toilet is capable of pumping waste into the tank, it SHOULD be able to pump the waste overboard unless you're planning to use a thru-hull further away from the head than the tank is.
Separate thru-hull
Thanks for the info. Any problem having the siphon break for the discharge being in the boat? Any chance of the smell entering the cabin?
Thanks for the info. Any problem having the siphon break for the discharge being in the boat? Any chance of the smell entering the cabin?
Not Sure What You Mean
..."in the boat". Mine is in a cabinet under the sink. Don't worry about smell in an overboard system... UNLESS you fail to flush it clean before returning to tank discharge. And, I'd make the final flush with fresh water. RD
..."in the boat". Mine is in a cabinet under the sink. Don't worry about smell in an overboard system... UNLESS you fail to flush it clean before returning to tank discharge. And, I'd make the final flush with fresh water. RD
Air valve in vented loop only lets air IN...
Nothing out. Just be sure there is an air valve in the nipple at the top...otherwise not only air, but anything else going through the loop can get out.
Nothing out. Just be sure there is an air valve in the nipple at the top...otherwise not only air, but anything else going through the loop can get out.
loops
You should put the vented loop betweent the thru hull valve and the y valve and it should be as high in the boat as you can put it. Like up under the deck. this ensures the vented loop is not depended upon to keep the boat floating when healed. or when the thru hull valve gets left open. (shouldnt happen but it will). keep in mind that local legislation bans overboard discharge in a lot of places.
You should put the vented loop betweent the thru hull valve and the y valve and it should be as high in the boat as you can put it. Like up under the deck. this ensures the vented loop is not depended upon to keep the boat floating when healed. or when the thru hull valve gets left open. (shouldnt happen but it will). keep in mind that local legislation bans overboard discharge in a lot of places.
A wee bit extreme, Ed
A vented loop only has to be 8-12" above the waterline at any angle of heel...how high that is when the boat's upright at rest depends on how far it heels. Since the purpose of a vented loop is to prevent from flooding the bowl, it doesn't matter whether it goes before or after the y-valve. I prefer to put them immediately after the toilet--ahead of the y-valve--because that location also prevents any runback from a holding tank while heeled from getting back into the bowl. Federal law bans overboard discharge either from the toilet or dumping a tank in ALL U.S. waters.
A vented loop only has to be 8-12" above the waterline at any angle of heel...how high that is when the boat's upright at rest depends on how far it heels. Since the purpose of a vented loop is to prevent from flooding the bowl, it doesn't matter whether it goes before or after the y-valve. I prefer to put them immediately after the toilet--ahead of the y-valve--because that location also prevents any runback from a holding tank while heeled from getting back into the bowl. Federal law bans overboard discharge either from the toilet or dumping a tank in ALL U.S. waters.
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