coragated drain tube

L

livingaboardboy

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Joined
Aug 16, 2008
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30612
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76
I am looking at buying a boat and the sink has a coragated dran that is going from the sink to a thru-hull fitting and it has a small crack in it. I will need to replace it and was wonder why this hose/pipe is coragated or rippeled which ever you want to call it, and can I replace this with a new hose/pipe that doesn't have the coragation. I am new to the whole boat with a head thing so sorry for the dumb question. but I am learning as I progress into bigger boats and want to learn all I can... thanks a bunch
 
IMO, avoid hose that is corrugated on the -inside-! Sometimes you will encounter hose that is smooth bore, but corrugated on the outside, which is ok.That said, find a smooth bore hose, and use that. A sink drain can be normally classified as a "low risk, low stress" device, and just about any type of hose would do, incl. clear vinyl. There are some nice fabric reinforced hoses that would do quite nicely, but there is no need for top of the line $10/ft sanitation hose.

The nasty corrugated hose that is corrugated inside and out is really inexpensive, which is why it is used. It is, also, IMO, junk for all uses, and should be recycled at the first opportunity.

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Perhaps I was hasty. If you take that inside/outside corrugated hose, and split it up the side, it -is- useful as a "split loom" for neatening up low current wire bundles. ;)
 
Upon re-read, I noticed, "...going from the sink to a thru-hull..".

If the thru-hull is ABOVE the WATERLINE ( which is what I expect ) then my first post is accurate.

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If the thru-hull is BELOW the WATERLINE then a "good" hose and double clamps are not just recommended but should be considered required. If this is the case, there are many nice mid-range, reinforced smooth bore hoses that will do the job. Again, be sure to double clamp. All below waterline thru-hull connections may be considered critical ( ie: failure = sink boat ), and you should exercise care and use well-fastened, tough components.
 
Many years ago I replaced about 10' of cheap 1-1/2" corrugated drain hose between the sink and the through hull. The hose was chafed through in so many places from the motion of the boat, that none of the water from the sink ever even made it to the through hull. Instead it leaked into the bilge making a nice mess. However it was ONLY a mess. Had the through hull been below or close to the waterline it could have meant a sunk boat.

Your call.
 
the through hull is above the water line but will use good SS clamps. Also want to replace hose from tank to sink, it has a clear tube that I will replace. whats the best way to get moldy water out of the tank
 
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