Why is it that a lot of boats do not come with vent loops? When you buy a new toilet it shows them in the papers you get with them. I have installed one in trying to get rid of the oder,My next step is to do hard plumbing with pvc as some new boats are using. I would like to hear comments from others what they think about vent loops and hard pvc plumbing
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Boat builders don't install vented loops because..
It's am added expense they don't consider necessary if the buyer never leaves a thru-hull open except when the toilet is actually in use. However, they make that just about impossible by putting seacocks in locations that are zo inaccessible as to make almost impossible just to close 'em when leaving the boat. As for replumbing with hard pipe... there have been a bunch of people here lately who've decided to go that route, but you need to know that hard pipe is only recommended for long STRAIGHT runs, and there aren't very many of those on sailboats...the stuff doesn't bend more about 5 degress, so every bend that's more reuqires installing a radius fitting that has to be PVC cemented, and each connection creates another "bump" that catches sea water minerals, waste, TP etc..,that every connection to anything rigid--toilet, y-valve, tank, pump, thru-hull--has to be "soft coupled" with enough hose--about a foot--to provide protection from shock and flex...all of which means, if you're gonna do it right your plumbing will have a zillion fittings in it, all of which are potential leakers. You'll typically enjoy 2-5 years of trouble-free, odor free sailing...but as the PVC cement begins to degrade, you're gonna be chasing one leak after another. But...it's your boat, and those who recommend it obviously know a lot more about it than I do.
It's am added expense they don't consider necessary if the buyer never leaves a thru-hull open except when the toilet is actually in use. However, they make that just about impossible by putting seacocks in locations that are zo inaccessible as to make almost impossible just to close 'em when leaving the boat. As for replumbing with hard pipe... there have been a bunch of people here lately who've decided to go that route, but you need to know that hard pipe is only recommended for long STRAIGHT runs, and there aren't very many of those on sailboats...the stuff doesn't bend more about 5 degress, so every bend that's more reuqires installing a radius fitting that has to be PVC cemented, and each connection creates another "bump" that catches sea water minerals, waste, TP etc..,that every connection to anything rigid--toilet, y-valve, tank, pump, thru-hull--has to be "soft coupled" with enough hose--about a foot--to provide protection from shock and flex...all of which means, if you're gonna do it right your plumbing will have a zillion fittings in it, all of which are potential leakers. You'll typically enjoy 2-5 years of trouble-free, odor free sailing...but as the PVC cement begins to degrade, you're gonna be chasing one leak after another. But...it's your boat, and those who recommend it obviously know a lot more about it than I do.
Randy, What year C36 do you have?
I have a 1999 C36 and it has vented loops for the head. Also I am not sure how a vented loop is going to help for the odor. Its more a safety feature so that you don't have to worry about water back siphoning into the head Do you know where the odor is coming from ? Are you sure its coming from the hose going from the head to the holding tank? If not I am not sure how hard PVC pipe is going to help with the smell. Is the smell when you first get to the boat and pump the raw water into the head to rinse? If thats when it is happens then a vent or hard PVC pipe is not going to help you. The only real useful upgrade I can see on my C36 for Holding tank smells is upsizing the air vent hose for the actual holding tank and getting a more proper (larger) air vent fitting
I have a 1999 C36 and it has vented loops for the head. Also I am not sure how a vented loop is going to help for the odor. Its more a safety feature so that you don't have to worry about water back siphoning into the head Do you know where the odor is coming from ? Are you sure its coming from the hose going from the head to the holding tank? If not I am not sure how hard PVC pipe is going to help with the smell. Is the smell when you first get to the boat and pump the raw water into the head to rinse? If thats when it is happens then a vent or hard PVC pipe is not going to help you. The only real useful upgrade I can see on my C36 for Holding tank smells is upsizing the air vent hose for the actual holding tank and getting a more proper (larger) air vent fitting
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