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Date Posted: - Friday - 05/25/07 - 12:26am
Author: Bryan
Subject: Randall I have another Question
This 81 m31 I am going to get was never finished by Oberly. There is no head, or plumbing for it. So I have to install the holding tank(already has the water tank) and I was wondering if you would know if the boat has thru hulls already in place that I can use for the head. Thanks
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Thru hulls -- Randall, - Friday - 05/25/07 - 6:22pm
Hey Bryan, I really don't get what you're asking.
I've not seen the 81 M31 you're looking at, so don't know if it has the head thru hulls in place or not.
Certainly the factory finished boat--especially if it was delivered floating--was entirely finished out where the head is concerned.
But if your head area isn’t built out at all, and you’re trying to figure the general location of a factory installed head and plumbing, etc., check out the “head shots” (now that’s funny!) of Scandia Dream, Promise, Carpe Dieum, and Triad on the MOA site. When looking at the Triad photo, for example, the thru hulls for the head are directly behind the head--the small intake is just to the head’s left, and the out-to-sea is just to the heads right.
These shots also show you how others have solved for plumbing.
If you need to install thru hulls and valves, etc. on your boat, I’d be happy to share sizing data for both as I replaced all mine a few years ago.
Is that even close to what you were asking?
RR
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Randall -- Bryan, - Saturday - 05/26/07 - 12:35am
Yes Randall that does help, I didn't look for the thru hulls when I checked the boat out, so I was just wondering if thru hulls are put in during const. of the hull or what. (just trying to figure out if it has any) If there are not any then can I just plumb the freshwater tank to the toilet, instead of installing thru hulls? Will this work? Also im looking for the railing that goes around the bowsprit. Also how common is it to find blisters on the hull when they are hauled? The boat is getting hauled next week for survey, the guy says he gets the bottom painted every 4-5 years. Thanks for everything, I'm going to have many more questions so hopefully you can give some more feedback on a regular basis. Thanks again so much.
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Head water -- Steve m-32 Pyxis, - Saturday - 05/26/07 - 1:18am
Usually salt water (or outside water) is used to flush the toilet. You can plan on about a gallon a flush so if you have a 40g water tank that is 40 flushes without leaving any for other purposes. If all you are doing is going out for the day or weekend this would work but why? Put in the through hulls and be done with it. They are not difficult to install. As far as blisters go I have not heard of any problems with the Mariners but yours was made after the resin formulations changed which caused a lot of the blister problems in the first place so you may be different fron the rest of us.
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Agreed -- Randall, - Tuesday - 05/29/07 - 3:44pm
Bryan,
I agree w/Steve. If you intend to sail the boat or at some later date sell it as a working boat, I'd install a head in the proper way.
Another resource is your local WestMarine rep--or similar where you are. They'd have good ideas about plumbing a new head and could walk you thru the options.
As to blisters, Murre had a few just below the water line on one side of the hull (I presume it was the "sunny" side in some previous marina), but they were really just "pimples", i.e. none were larger than an eraser head and none were below the gel coat. So, frightening, but not serious. I opened and filled them and then sealed the hull, and none have returned.
RR
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thru hull fittings -- mike m-40 chaser, - Saturday - 05/26/07 - 9:44am
Hello
The mold was made solid when laying up. The holes are cut after the glass has set up. Use raw water to flush. If in salt water, the salt kill bacteria and will help keep your potty clean. If no holes have been cut yet, install the inlet thru hull above the inlet of the head and forward. Cut the outlet thru hull below the head and aft. Gravity drain. If you would like pictures, let me know, I have mine out right now. Also, you might want to consider installing a sewage treatment unit. It treats the waste (brine tank and electricity) and you can discharge anywhere. I have one on my boat, coast guard approved, and you don't have to worry about it. If thru hulls are not installed yet, come up with a good plan before cutting holes! Another thought to consider before locating positon of thru hulls is clearnace. Always install a shut off valve at the thru hull location. Spend a little extra and get the good stuff!! The navy learned the hard way on submarines!
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Mike pics would be nice -- Bryan, - Saturday - 05/26/07 - 3:42pm
Yes that would be helpful, if you could send pics to my email of where they are, as far as forward and aft the head, and how far below the water line. Thanks a million Bryan
bwatte@gmail.com
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