Skin fitting in forward part of hull?

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ridgy

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Installing a new bilge pump and the best pipe routing would have it exiting above the water line in the heads, just forward of the mast. I can't really think of a reason why this would be a problem except that it's unusual to see skin fittings so far forward and walking around the yard confirms this, they're always aft of max beam. Any thoughts before I get the hole saw out?
 
ridgy said:
Installing a new bilge pump and the best pipe routing would have it exiting above the water line in the heads, just forward of the mast. I can't really think of a reason why this would be a problem except that it's unusual to see skin fittings so far forward and walking around the yard confirms this, they're always aft of max beam. Any thoughts before I get the hole saw out?
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Unless I am misunderstanding your point I have never heard that ‘rule’. We have, from the factory of a reputable builder, inlet and outlets for the forward head, shower drain, watermaker intake, aircon intake - so 5 inlet/outlet skin fittings - plus the usual log and depth - forward of the mast. I haven’t worried about this up to now - should I?
 
Instead of drilling (another) hole I'd look to see if I could join, 'T' fitting, the bilge pump pipework to an existing piece of pipework, galley, vanity sink.

Jonathan
 
ridgy said:
Installing a new bilge pump and the best pipe routing would have it exiting above the water line in the heads, just forward of the mast. I can't really think of a reason why this would be a problem except that it's unusual to see skin fittings so far forward and walking around the yard confirms this, they're always aft of max beam. Any thoughts before I get the hole saw out?
Click to expand...
Maybe skin above the waterline skin fittings are aft of the maximum beam to reduce the possible pressure as the boat moves forward ?

I have seen motorboats with discharge points quite well forward.

If that is the best spot and shortest pipe run, etc I would get the hole saw out !
 
Graham376 said:
Problem with doing that is when leaving the boat. Seacocks are usually shut off whereas the bilge pump outlet stays open.
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Our vanity sink discharged well above the water line, like most, all?, bilge pumps and had no seacock. Our shower sump, galley sink also discharged well above the waterline and had no seacocks. The reject from the desalinator was...above the water line and shared with a vanity sink. If a bilge pump can discharge above the waterline - so can a vanity sink.

The only below waterline closable sea cocks were the desalinator, inlet, heads, engines and galley salt water. I would have had a 'T' fitting for the desalinator and galley but they were in different hulls. The desalinator seacock was only open when the unit was in use.

It did help that our arrangement was in a catamaran where heeling is minimised.

Yachts should be designed or modified to reduce the seacocks to a minimum.

Jonathan
 
Neeves said:
Our vanity sink discharged well above the water line, like most, all?, bilge pumps and had no seacock. Our shower sump, galley sink also discharged well above the waterline and had no seacocks. The reject from the desalinator was...above the water line and shared with a vanity sink. If a bilge pump can discharge above the waterline - so can a vanity sink.

The only below waterline closable sea cocks were the desalinator, inlet, heads, engines and galley salt water. I would have had a 'T' fitting for the desalinator and galley but they were in different hulls. The desalinator seacock was only open when the unit was in use.

Yachts should be designed or modified to reduce the seacocks to a minimum.

Jonathan
Click to expand...

Our boat has seacocks on all outlets although they discharge above the waterline and are closed whenever we leave the boat for extended periods. If we had a mooring failure and ran aground on the salt flats, the boat could flood through the wash basins and galley sink if not closed. The 3 bilge pumps, two of which are automatic, discharge just below the toe rail and don't have seacocks.
 
Neeves said:
Our vanity sink discharged well above the water line, like most, all?, bilge pumps and had no seacock. Our shower sump, galley sink also discharged well above the waterline and had no seacocks. The reject from the desalinator was...above the water line and shared with a vanity sink. If a bilge pump can discharge above the waterline - so can a vanity sink.

The only below waterline closable sea cocks were the desalinator, inlet, heads, engines and galley salt water. I would have had a 'T' fitting for the desalinator and galley but they were in different hulls. The desalinator seacock was only open when the unit was in use.

It did help that our arrangement was in a catamaran where heeling is minimised.

Yachts should be designed or modified to reduce the seacocks to a minimum.

Jonathan
Click to expand...
My boat's vanity sink discharges to the side and backfills to the point of overflow when very well heeled over... (Factory fit on Beneteau Evasion 34) It has a seacock to stop this happening, which is an adequate solution when we remember to close it in time... The shower tray will backfill from the bilge in similar conditions... :censored:

[Edit: I have already bought, but not yet fitted, a pump & fittings to divert the shower to the transom via a deckhead loop.]
 
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