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353 Cabin sink drain into Bilge

Old 06-06-2016, 12:09 PM
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Default 353 Cabin sink drain into Bilge

Ok so Im not too pleased with the cabin sink drain dumping into the bilge. I dont need pop, beer, or gatorades going in there.
Anyone pop a hole through the side? Do I need to watch out for any hull liner or other structural shlt?

Last edited by Back4More; 06-06-2016 at 12:12 PM.
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Old 06-06-2016, 12:14 PM
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Is the bottom of the sink at least 6" above the waterline?
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Old 06-06-2016, 12:20 PM
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On my 242 it drains out the side of the boat I know it's like comparing apples to oranges. I would think it would drain into the holding tank or direct to the out side.
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Old 06-06-2016, 12:53 PM
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My 292 does the same thing.
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Old 06-06-2016, 12:58 PM
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On our 05 353 the drain for sink went into the bilge, that's just not cool when a relative pours red Kool Aid into the sink and ends up in your white bilge. I looked into modifying it and was going to install a "shower box" and dump out the stern under the platform like the rest of the factory hook ups. I remember there being some sort of issue with height of the sink relative to the water line also. I called Formula parts dept and talked to them and they said the factory did not want any un-sightly holes in the sides of the boat so that is the reason for all the discharge points under the swim platform, for what its worth.
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Old 06-06-2016, 03:10 PM
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I think your best option is going to be as Voodoo recommended. Install a shower box with a float switch and tie it in to an existing or drill a new thru hull. At least this one will be above the water line.

This is the main reason why I still have a water tank full of antifreeze from 5 years ago and why I don't invite people out on my boat.
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Old 06-06-2016, 06:43 PM
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I have read you are not suppose to put holes in sides of the hull on the fastech's. However, I have a 353 with factory air that has a water discharge hole about 12"-18" above the water line on the forward starboard side about two feet forward towards the bow were the u-shape sitting area and the v-berth meet. The funny part is the drain pan for the AC has a normal bilge pump that discharges to a diaphragm pump out the aft or below the swim platform. Just a weird set-up.

The sink draining to bilge upsets me too, I was just going to put it in series with my diaphragm pump with a check valve. Just haven't got to it yet.
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Old 07-08-2016, 09:44 AM
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I added a through hull fitting for my 353 sink drain. No issues.
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Old 07-08-2016, 10:37 AM
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I think I'd do the "HEY LISTEN BASTARDS" mod before drilling in to the sides of my boat.
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Old 07-09-2016, 09:04 AM
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Good to know. Formula for Fun you got a picture of the location you went out the side and what it looks like?
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