replacing 53MY waste hose from master head with pipe

[MikeP]

I just finished pulling the white sanitation hose I installed 5 years ago that runs from the master head forward through the eng room to the forward waste tank. Like all the other white hose I installed new at the same time, (and have since replaced) it failed miserably and rapidly re odor permeation.

I am going to replace that long length with PVC pipe as other have done. In looking, it appears that I will have to cut pipe into relatively short - maybe 3 feet) sections and join it in place. There are 5 small access panels in the passageway so it isn't difficult to glue the pipe sections together under the floor. Is that how others have done it or am I missing some obvious technique that allows longer lengths to be fed through?

Any other tips/comments/suggestions?

 

[magnawake]

I'm on the fence on this idea myself. I have stink coming from somewhere. I cant imagine its all hose permeation, but it might be. There's that new hose that trident has thats suposed to be a good long life hose I was looking to buy, but, PVC seems like the way to go. If you had a small bend, you could still install a little 5" piece of flex hose to let it flex. Also it would be cheaper. The trident hose is about $90/12 ft. section. Good post, tanks.

 

[MikeP]

FWIW, the white hose that didn't last long was Shields XHD. Earlier this year I replaced all the other lengths of it in the boat with Parker Armada which is the same as the original oem Bellowflex that was used for waste and was still odorless on our boat after 25 years! I replaced the Bellowflex because I ASSUMED it couldn't have lasted much longer.

I could just purchase more/install Armada for that section but PVC seems to make sense for that run. I may rethink that if it fractures somewhere down the road!

 

[Angela]

Mike, you're on track with your thinking in how to run that long line with pipe - that's what I did, but I was able to get a much longer piece at a time in there - I think the pieces were about 6'. I pushed them in through the access hole in the cabinetry in the master SR, pushing them towards the stern under the exhaust tube. I then pushed that pipe forward along the outboard side the boat, behind the master shower, etc., and then put another pipe in (pushing aft) and gluing them together as I kept shoving them forward. Point I'm making is that if you put the pipes in towards the back, you'll be able to get a much longer piece in there to feed forward. At least that's how I went with my boat. Did I make any sense?

When I got to the ER bulkhead, I ran hose under the floor, under the guest head and picked up with pipe again in the ER. I just couldn't snake hard pipe through that area - didn't have enough access areas in that spot to get at it. I was able to run pipe the rest of the way forward. You'll have to do the "cut and glue" thing again in the genny room to get the pipe through the ER.

Get out your hole saw and don't be shy.

 

[MikeP]

Ang, I think you must have a better access angle from aft in your 58 than I do in the 53. I couldn't get any length of pipe in from the master because the angle created by the hatch opening to the first cutout under the floor required too much of a bend in the PVC to work.

So I ran it from the eng room back in 3 ft lengths - 3ft is the longest I could fit in from the Eng room end. I just finished the complete PVC portion (three joints, four 3 ft sections) from where the hose from the head pump will connect to about 1/3 of the way into the eng room.

I have new (6 months old) Armada hose running from a fitting in the ER to the waste tank so I'm just going to run the PVC to that point and connect the existing Armada to the PVC. I had to do some minor cutting on one of the stringers under the floor to avoid an impossible bend for the PVC but other than that it was fairly painless. Aft head sould be back working in another hour or two...unless I decide that it's 5 O'clock somewhere and finish it mañana.

 

[John Dickson]

What schedule PVC did/are you guys using?

Thanks John

 

[SKYCHENEY]

I used standard schedule 40 and it's been in there for 6 years now through many thousands of miles traveled, and many different sea conditions (some not so great). It has held up well.