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Old 03-10-2023, 09:13 AM   #1
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Crack then a Thunk

Yesterday, I was removing the shower drain hose from the sump. Immediately after carefully getting the hardened hose off of the sump tank there was a crack, then a thunk. The shower drain assembly, which is hidden under the shower pan and behind a stringer shattered and dropped!

Time for some exploring. The opportunities from owning a 40 year old boat!

At least when I am done I will have a completely new water system from tanks to spigot.
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Old 03-10-2023, 09:25 AM   #2
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Plastic and rubber get brittle with age, plain and simple.

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Old 03-10-2023, 09:27 AM   #3
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On old boats, sometimes 'fixing' really means 'breaking'. At least to start out with. When I start a new project, my wife laughs and asks how many 'new' side projects are going to sprout from this one new project.
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Old 03-10-2023, 09:39 AM   #4
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When I added a holding tank and new hoses for the new Raritan Elegance toilet I was tempted to replace the shower sump hose but after finding NO access to the bottom of shower drain hose connection I decide it was far to much of a PIA and in my case not necessary since all was working properly. Good luck and please post how you solved the issue.
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Old 03-10-2023, 12:21 PM   #5
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Here is a picture of the route for the shower drain line. Currently it gives about 3" high for access. Should just take a little bloodletting. Excuse the funky colors of the picture. When I compressed it the colors changed...the black grossness is still the black grossness...changing sump as well.

Also I'm working on the finish work for the ME install.
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Old 03-10-2023, 12:24 PM   #6
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This is the drain I ordered. We will see if it works:

Scandvik 10307 Low Profile Elbow Shower/Cockpit Drain, 1" Outlet
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Old 03-10-2023, 12:31 PM   #7
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On our boat the sump isnít just for the shower but everything drains into it, sinks, shower condensate from the A/Cs. It is a large sump and when we bought the boat it had cracked apart. I had one made out of 1/2Ē welded plastic.
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Old 03-10-2023, 12:43 PM   #8
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Our sump just has the shower and ac condensate.

When installing the ME, I used Starboard as the final layer for the platform. Now we have 1.75" of plywood and glass topped with 1/2" Starboard. I figure 2.25" should be supportive enough.
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Old 03-10-2023, 12:45 PM   #9
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Our sump just has the shower and ac condensate.

When installing the ME, I used Starboard as the final layer for the platform. Now we have 1.75" of plywood and glass topped with 1/2" Starboard. I figure 2.25" should be supportive enough.
Sounds like it will be strong enough. Gotta love Starboard.
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Old 03-10-2023, 01:10 PM   #10
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Quote:
Originally Posted by PhilPB View Post
Immediately after carefully getting the hardened hose off of the sump tank there was a crack, then a thunk. The shower drain assembly, which is hidden under the shower pan and behind a stringer shattered and dropped!
The dreaded crackle-thunk inside my boat is always enough to shiver me timbers! I have a 47 year old....
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Old 03-10-2023, 01:17 PM   #11
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My shower drain is barely accessible. Instead of a sump, I use a Whale Gulper diaphragm pump that I turn on when showering. It's a bit noisy but has lasted for many years. If I needed a separate sump for A/C condensate, I would use one of the small pumps purposefully built for that.

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Old 03-10-2023, 03:59 PM   #12
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Funnily enough, I'm doing this exact same thing (albeit with better access). The existing shower pan drain isn't bolted in at all and can spin once I removed the hose. Was just trying to add a gray water shower pump and am now having to deal with the flange fitting as well.
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Old 03-10-2023, 05:29 PM   #13
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When we owned our 34 Mainship, I always anticipated having to access the same shower drain but never had to. The drain for the head floor, when water was splashed from the shower or just from general cleaning, just seemed to drain directly into the bilge outboard of the stringer, which was a crappy design. Had I ever needed to access the shower drain, my plan was to put a deck plate in the floor which would allow me to access the shower drain and while I was at it, tee the floor drain into the shower drain ,where both would be plumbed into the shower sump. A bathroom floor mat would've covered up the low profile plate, for the most part.
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Old 03-10-2023, 05:31 PM   #14
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Greetings,
Mr. PB. Whew. I'm glad it was THAT kind of crack/thunk rather than crack/thunk followed by pan-pan, pan-pan, pan-pan, kind of crack/thunk.


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Old 03-11-2023, 12:56 PM   #15
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Greetings,
Mr. PB. Whew. I'm glad it was THAT kind of crack/thunk rather than crack/thunk followed by pan-pan, pan-pan, pan-pan, kind of crack/thunk.

You and me both!
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Old 03-11-2023, 01:08 PM   #16
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So how are you getting to the underside of the shower pan to install the new drain ? Looks like you can’t get your hand and arm into that little opening .
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Old 03-11-2023, 01:12 PM   #17
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Quote:
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Greetings,
Mr. PB. Whew. I'm glad it was THAT kind of crack/thunk rather than crack/thunk followed by pan-pan, pan-pan, pan-pan, kind of crack/thunk.


I saw what you did there!
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Old 03-11-2023, 02:14 PM   #18
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So how are you getting to the underside of the shower pan to install the new drain ? Looks like you canít get your hand and arm into that little opening .
Contorted, I can just barely get my hand and wrist in there. I can always open up the hole a bit, the stringer is ~ 2" thick. I ordered this drain and if it can fit, it should be good. I figure worse case a warmed bit of butyl tape may work to seal the underside.
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Old 03-11-2023, 03:07 PM   #19
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Yeah it looks tight. You might want to consider installing the hose on first, then fish the new drain and hose to the drain hole. Shine a bright light into the hole from the shower so you can maybe see your target form the other side. I’ve also used some butchers twine and a 3/8 nut or so as a weight and give that a toss to the light or tape the twine to the end of metal coat hanger or 1/4” all thread rod and fish that to the hole. Then you can pull the string and rod out through the hole with your fingers of long reach pliers up into the pan .
Now tie the other end of twine to your drain with the hose already on and pull it to the hole in the pan.
Hopefully you can get in place right for a water tight seal.
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Old 03-12-2023, 12:42 PM   #20
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Quote:
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Contorted, I can just barely get my hand and wrist in there. I can always open up the hole a bit, the stringer is ~ 2" thick. I ordered this drain and if it can fit, it should be good. I figure worse case a warmed bit of butyl tape may work to seal the underside.

Phil,

I bought the identical drain . . . two of them in fact. Turns out, they're great if you are installing in a metal pan, or a really THIN fiberglass pan, but with a wood pan, you will need a much longer screw than the one provided, AND you will need to seal/fiberglass the raw edges of the wood shower pan to prevent water from soaking into the wood pan and rotting it out. I ended up going another route. The two drains are somewhere LOB. (lost on boat).
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