Seacock size waste

[Steve McGill]

Seacock size for waste thru hull. Web access very poor.small leak when closed. 1988 mk 1.

Thanks,

Steve

[Stu Jackson]

Most are 1 1/2" to match the hose diameter of the toiler (head) outlet hose.  No guarantee yours is still OEM.  Good luck.

[waughoo]

My 91 doesnt have a direct overboard option.  The macerator is the only waste overboard choice.  This thru hull is much smaller than 1.5"  that said, im not aure what size unfortunately.

[Noah]

My Forespar Series 93 seacock/valve/thru-hull discharge for the head is 3/4 in. NPSM with a 3/4 female NPPSM threaded top to insert a 3/4 in. tailpiece to 1 in. hose barb—which fits 1in. ID hose to macerator pump. You could probably use a 1in. seacock/valve with a 1 in. hose barb tailpiece. My boat came with a 3/4. Thru-hull so that is the size I replaced it with. If you go direct overboard, without a macerator, go bigger.

[Steve McGill]

Thanks,

My original seacock is/was 3/4" the macerator is one inch. I had a real short haul (boat in slings, but still in well, raised just enough to get thru hull out of water) and I took 10 minutes to replace.

Steve

[Noah]

 

[waughoo]

I was at Fisheries supply the other day and saw this nifty rig that had a soft flexible flange on a stick that one shoves through the valve from the inside of the boat while the valve is open and in the water.  Once through the hull the rubber flips open and is pressed tight to the hull with the hydraulic pressure making a temporary seal.  Now the valve can be safely removed/unscrewed from the thru-hull fitting and the new replaced.  Once the new valve is replaced, the stick is pulled, the flexible flage folds and comes through the valve and one closes the valve with minimal water intrusion.  Its pretty slick.  Unfortunately i can't remember the name of the thing.  I'll try and take a photo the next time I'm there.  I don't need one today, but it is good to know about it.

[Bill Shreeves]

I installed a Forespar Marelon Full-Flow Seacock a couple of weeks ago.  It came with a plug that covers the handle screw.  You pop the cover off, attach a lanyard to the loop then insert it in to the through hull, from the wet side, if you need to rebuild the valve.  Once done the maintenance, a tug on the lanyard retrieves the plug.  No getting away from getting wet the first time but, I was impress that it came with the it.