holding tank

[bobcat17801]

hoooooraaaaaaah

Peggy,My feelings exactly.You asked about the vented lines.good question.1. Intake line is vented thru sink in head.2. Need to engineer vent in line from head to tank I plan to work on that when I do the instalation of the hoses, toliet, and valves.Did I miss any lines here? thanks again for your imput.......bobcat

 

[BobW]

There are vents and there are vented loops.

I'm not sure about the vent through the sink in the head... Peggy might know about that.If the toilet is below the waterline:You MUST have a vented loop (see picture below) between the pump on the toilet and the toilet bowl.You MUST have a vented loop in the hose between the macerator and the discharge through-hull.You SHOULD have a loop (venting is optional, not recommended by me) between the toilet and the holding tank. This loop does many good things, none of which are involved in keeping your boat from sinking (which IS the reason for the first two).There are several threads in this forum that discuss loops and vented loops.Cheers,Bobs/v X SAIL R 8

 

[Peggie Hall HeadMistress]

Ohhhhh, Bobcat...what ARE we gonna do with you?

Head intake is vented through sink in head??? That won't work, darlin'...'Cuz-- a) it's in the wrong line. When you inject air--whether it's a vented loop or the sink drain line--into the line between the thru-hull and the pump, the toilet will suck in air, preventing it from priming. The vented loop (sorry, but ya gotta use a LOOP) in the head intake has to go between the pump and the bowl...to replace that short piece of hose the factory uses to connect 'em. AND, it has to be at least 6-8" above the waterline at any angle of heel.b) unless it is at least 6-8" above the waterline at any angle of heel--which there's no way it can be in the sink drain--it won't prevent water outside the boat from seeking its own level INside the boat if the thru-hull is open and the toilet is left in the wet mode. So it's back to the drawing board for this one, I'm afraid...As for the loop--vented or otherwise--in the head discharge line, check out this photo...I've never seen the intake and discharge loops done better. And Bob (thanks again for the photos!) has posted another one showing how to do it correctly.