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Skin fitting

Hi, new member, have a 30 ft springer 1992 project boat and redoing the kitchen, old waste pipe was size of a standard garden hose with several u bends, and made draining very laborious, want to fit proper 1 1/2 drainage pipe, is this advisable? Is it ok to make a bigger hole for a more suitable sized skin fitting?

Asked by: robert hutton  | 8.02pm, Monday 4 August


WW says:

It is absolutely fine to make a bigger hole- use a hole saw, if possible, with plenty of lubrication to avoid overheating (water with a few drops of washing up liquid in is a fairly environmentally safe way!). Run the drill slowly and file off any rough edges before fitting the skin fitting.
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Whatever fitting you use (either bronze, brass or plastic) consider using some silicone sealant to ensure the seal between the fitting and the hull is sound.
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If the drainage outlet is less than 150mm above the static waterline, I would strongly suggest that you ensure that the fittings inside the boat, to at least that level, are both watertight and secure- if you use hose, then double-jubilee clip the pipework, and consider jointing compound with compression plastic plumbing- avoid push-fit plumbing. This helps ensure the integrity of the pipework, should the boat tilt or become lower in the water at any point.

Mark Langley  | 4.11PM, Tuesday 5 August

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