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 Another thru haul ?		  New Topic  Topic Locked
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C25BC
Navigator

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Canada
200 Posts
Initially Posted - 07/22/2017 :  21:27:17  Show Profile
I have a 2 " threaded pipe under the port setee with a galvanized cap threaded on about 12" from the galley ,is this a standard feature ? Or if not why is it there ?
Angus
S.V.Tempus
#4748
1984 Catalina 25 SK/SR/Trad.

hewebb
Admiral

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USA
761 Posts
Response Posted - 07/23/2017 :  04:56:44  Show Profile
If I had to guess. It may be where the holding tank could dump into the lake at one time. That is where my holding tank is located. If it had a Y valve that is probably where it would be. The pipe is probably a brass or bronze fitting and you may want to check the condition of the galvanized cap. I,m guessing it may rust out from the threaded area which may not be galvanized.
1988 WK/SR w/inboard diesel Joe Pool Lake
Hobie 18 Lake Worth



Life is not a dress rehearsal. You will not get another chance.
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islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 07/23/2017 :  06:49:59  Show Profile
If the thru hull is forward of the galley sink drain thru hull and is under the aft section of the settee I would say that a PO installed it for some unknown reason. Catalina drawings of the plumbing thru hull's don't show any thru hulls in that location. A word of caution, If the pipe nipple or thru hull is bronze and the cap or pipe nipple is Galvanized steel, That is dissimilar metals and is a no no. The metals should all be the same. The entire assembly needs to be the same. All bronze or all plastic. ABYC P-06 standard / UL 1121 standards specifically states that all metals must be galvanically compatible.
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


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islander
Master Marine Consultant

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USA
3992 Posts
Response Posted - 07/23/2017 :  07:38:13  Show Profile
quote:
Originally posted by islander

If the thru hull is forward of the galley sink drain thru hull and is under the aft section of the settee I would say that a PO installed it for some unknown reason. Catalina drawings of the plumbing thru hull's don't show any thru hulls in that location. A word of caution, If the pipe nipple or thru hull is bronze and the cap or pipe nipple is Galvanized steel, That is dissimilar metals and is a no no. The metals should all be the same. The entire assembly needs to be the same. All bronze or all plastic. ABYC P-06 standard / UL 1121 standards specifically states that all metals must be galvanically compatible.The only reason for it's location that I can think of is that your boat has or had a marine head and the PO wanted to discharge overboard.
Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound


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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.