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HoffaLives 12-18-2007 09:56 PM

buildup in poo hose
yet another poo thread, but i saw a neighbor beating the crap out of a length of sewage hose with a mallet, trying to get the calcareous deposits out. it reminded me of when i installed my holding tank - all the old hoses had this hard deposit in them and i recall reading that it's the dead shells from all the poisoned plankton. the old hoses had lost like 1/3 of their original diameter, and it's not something i want to clean out the way the neighbor did it. is there any way of preventing the buildup? if it is shells it would be alkali - has anyone tried running vinegar down there regularly?

sailingdog 12-18-2007 10:23 PM

Vinegar would be a very good way to get rid of the calcification... probably monthly. Also, vinegar isn't strong enough to damage the seals and hoses generally.

camaraderie 12-18-2007 10:30 PM

It is not is what happens when uric acid mixes with salt water. The standard preventative treatment is to flush vinegar slowly through the system once a month...over a couple of hours.
Once you HAVE the problem...the solution is to flush muriatic acid through the system. Do a search here on muriatic for a complete procedure. Problem solved.

sailingdog 12-18-2007 11:19 PM

Be very careful when mixing the muriatic acid since it comes in various strengths.. so check what the strength of the acid you purchase actually is—don't guess.

Lion35 12-19-2007 12:04 AM

Poop again..., well I can comment on pee but not poop. I use about a cup of vinegar once every two weeks and about a half a cup of cooking oil once every two months (to lube the seals) if you're ambitious, add seasoning and make some salad dressing. If you have the problem already beware too much vinegar at once. I did this and ended up with a very large amount of solids clogging the plumbing, it resembled sand in texture and there was a ton of it.

sailingdog 12-19-2007 08:51 AM


Unless you pump out right after you pour the cooking oil through the system, I would avoid pouring cooking oil into a head. It will float up and sit on top of the holding tank contents and kill off the aerobic bacteria, but cutting off their air supply... leaving the anaerobic bacteria, which are the ones that produce the sulphur based smells... not a good idea... :) YMMV.

capttb 12-19-2007 09:52 AM

I just replaced my head and hoses, how "frugal" would a guy have to be that would remove, clean and reinstall a hose ?

TrueBlue 12-19-2007 09:53 AM

That's like taking a shower and putting your dirty underwear back on.

chucklesR 12-19-2007 10:01 AM

No sh.., I mean poo - Just replace the damn hose - even if you do it as part of a normal spring commissioning every year it's what 20 bucks in hose? As opposed to 15 bucks in vinegar and hours of sloooowly flushing?
I can see doing the smash and spray dockside if you are a liveaboard, after all you have no leaves to rake and nothing else to do (kidding, just kidding) but for normal weekend use it would take years of use/misuse (not fully flushing with fresh water when returning to dock) to clog a hose with calcificied carbon uric poo sludge.

sailingdog 12-19-2007 10:12 AM

As a maintenance regimen, it makes sense to do the vinegar thing...but as a fix... I think replacing the hoses is easier and probably faster and safer...if a bit more fragrant.

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