My 2005 31 has a Y-valve. I would be reluctant to add a view port, seems like it’s just another place for leaks and odors to escape.
Thank you teejay. Maybe PS realized their oversight by the time they built your boat. Mine is a 1994 vintage. Yes, I agree, an inspection/view port would be a risk. I'm leaning against it.
My setup is the same as yours. I've often wondered why Pacific Seacraft did it this way as it certainly isn't ideal for permeation. I guess using the Trident hose helps. When I replace the hoses, I will probably put in a y-valve.
Regarding the tank, there is a procedure for sealing the lid that has appeared on this forum a few times. My impression is that it is not so easy to get a good durable seal. So unless the holding tank is leaking, I would avoid taking off the lid. I wonder if it is possible to clean out the tank by half filling it with water and some special detergent, and then going for a sail in boisterous conditions?
Thank you Joost. I'm glad to hear that I'm not the only one wondering about why they did the plumbing without cutting off the possibility of allowing sewage to sit in the hose. One way of preventing that is to regularly purge that line, but then it would presumably just fill up again on the next flush.
The only thing I was wondering about was that since the design of that actual joining of three hoses is with a T-coupling (not a Y as implied in the drawing), and the line to the overboard discharge comes off the side of the T-fitting, maybe they felt that the flush would predominantly go to the holding take hose (which is fitted to the bottom of the T-fitting). See photo.
I agree with you on the resealing of the tank lid. I cleaned out the aft water tank and removed the lid to do so. It was a pain to get a good seal on it, my first attempt had a leak. With fresh water that's just an annoyance, but with holding tank effluent, quite another story. I like your idea of filling it with water and then going for a sail. Plenty of boisterous days out on Lake Erie.