Replacing flex hose with PVC pipe

[patrick]

Peggy, I am contemplating the process of replacing the flex hose in my Hunter 37.5 with schedule 40 PVC pipe. Presently, the flex hose is routed fairly level from the toilet to the rear bulkhead and then up about 18 inches at the tank to the tank inlet. I wanted to know (1) if it would be best to run the pipe up inside the hanging locker and then along the back of the locker next to the hull. That would make the longer run of pipe down hill into the tank. Also there would not be so much standing liquid in the pipe as there is now in the hose.Then the only part of the pipe which might back flush into the toilet would be about two to four feet high instead of about eight feet length that it is now. I am also planning on using 1.25 inch pipe instead of 1.5 inch.I plan to neck down the PVC pipe to a diameter which will just fit inside the plastic flex pipe which is there now. I have tried that and it is fairly easy to do using a heat gun and a couple of metal clamps to shrink the ends and form a fitting. I plan to use short lengths of the flex pipe to attach (adapt) the pipe to the toilet and tank fittings. That seems to me to be a better choice than the flex rubber couplings used by the other guy who posted his project elsewhere on this site.Second question is would ABS be a better choice than PVC? I think that it would work just as well.Third question is should I put in a union or two so that I can disassemble the pipe for cleaning and maintenance. That has been suggested to me but I have a vision of a union coming loose and filling my hanging locker with bad stuff.

 

[Peggie Hall HeadMistress]

I can't see anything wrong with your plan, Pat...

But IMO its a bit of unnecessary overkill. A good quality hose (Trident 101/102 http://www.tridentmarine.com/stage/sanitation.htm which you can get for

 

[Tim Welsh]

Sealand Odorsafe

Hey Peggy,  a few years back you were touting sealand odorsafe hose, is this actually better or sponsor issues? I'm just curious, I installed the sealand 5 years ago and am still happy with it. I'm fixing to purchase another 50 foot roll so my boys at the lake can replum their boats.Tim Welsh1986 Hunter 34S/V Cabo WaboLake Ouachita, ArkansasBeat your competition, Run'em Agound!!!!!!!

 

[Peggie Hall HeadMistress]

That was before Trident 101/102

For quite a few years--especially when it was made for SeaLand by the Aussies--"OdorSafe" was the most odor-impermeable sanitation hose...and it still is one of the two best, though not 100% "bullet proof." I've personally seen permeated "Odorsafe" on several boats and heard of others from reliable sources and owners. Trident introduced their 101/102 (same exact hose except for color) http://www.tridentmarine.com/stage/sanitation.htm, which is a double-walled rubber hose that has a biocide in the rubber formula, about 6 years ago. In that time I've NEVER heard of a single failure.It's also a bit softer, and therefore easier to work with, than OdorSafe...something "your boys" will definitely like!I have no sponsors...never have had any. I call 'em as I see 'em...always have, always will...and technology changes constantly...New things of all kinds are being introduced all the time. Not all of 'em are an improvement, but when somebody does "build a better mousetrap" than the previous best mousetrap, I'm gonna recommend it...till they or somebody else builds an even better one. Btw...OdorSafe and Trident 101/10 have about the same list price--around $9/ft. Somebody on another forum put me onto a source for Trident 101/102 that sells it for

 

[Tim Welsh]

Thanks for the info Peggy

Thanks again for the info, were going to have to get you down to Ouachita one of these days and take you out for a sail.Tim WelshHunter 34S/V Cabo WaboBeat your competition, Run'em aground!!!!