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Ajay73 10-29-2012 08:55 AM

Seacocks
 
Question about the little screw on the side of the body of bronze, flanged seacocks. Is that for lubrication or for draining water for winterization? Thanks for your help.

BubbleheadMd 10-29-2012 09:03 AM

Re: Seacocks
 
That's for draining for winterization.

If these are bronze, tapered cone seacocks, you remove the cone from the body, lap them with lapping compound, then you lubricate them.

FYI- Groco made these wierd seacocks with a rubber cone. These have a T-handle on the end of the body to swell the cone once you've positioned the valve to open or shut. (Just in case you have these)

PorFin 10-29-2012 10:13 AM

Re: Seacocks
 
Quote:

Originally Posted by Ajay73 (Post 939831)
Question about the little screw on the side of the body of bronze, flanged seacocks. Is that for lubrication or for draining water for winterization? Thanks for your help.

Both -- you can drain the water from a closed seacock through the hole; or if you insert a zerk fitting, inject grease into the seacock.

Ajay73 10-29-2012 11:01 AM

Re: Seacocks
 
Quote:

Originally Posted by PorFin (Post 939863)
Both -- you can drain the water from a closed seacock through the hole; or if you insert a zerk fitting, inject grease into the seacock.

Thanks for the reply. If you open the seacock with the boat out of the water does that eliminate the need to use the drain/lube hole to drain water. In other words, is there possibly water in the seacock body that is somehow trapped and can only get out through the drain hole?

These seacocks are Apollo brand. Bought them at West Marine.

Maine Sail 10-29-2012 11:24 AM

Re: Seacocks
 
Quote:

Originally Posted by PorFin (Post 939863)
Both -- you can drain the water from a closed seacock through the hole; or if you insert a zerk fitting, inject grease into the seacock.


Spartan for example specifically advises against this. Those screws in Spartans are specially made of the same alloy, 85-5-5-5 bronze as the rest of the seacock. There is no such animal as an 85-5-5-5 bronze grease zerk thus installing one introduces dissimilar metals into the equation... They also strongly advise against using that screw for bonding. They are drain plugs for intended winterizing..

Maine Sail 10-29-2012 11:27 AM

Re: Seacocks
 
Quote:

Originally Posted by Ajay73 (Post 939882)
Thanks for the reply. If you open the seacock with the boat out of the water does that eliminate the need to use the drain/lube hole to drain water. In other words, is there possibly water in the seacock body that is somehow trapped and can only get out through the drain hole?

These seacocks are Apollo brand. Bought them at West Marine.

You have ball valves and they should ideally be drained.... Opening and closing does not always allow them the drain. It should, but does not always.. With tapered cone they do drain but with ball valves not always..

Ajay73 10-29-2012 01:42 PM

Re: Seacocks
 
Quote:

Originally Posted by Maine Sail (Post 939894)
Spartan for example specifically advises against this. Those screws in Spartans are specially made of the same alloy, 85-5-5-5 bronze as the rest of the seacock. There is no such animal as an 85-5-5-5 bronze grease zerk thus installing one introduces dissimilar metals into the equation... They also strongly advise against using that screw for bonding. They are drain plugs for intended winterizing..

MS, could you use the grease zerk, grease the valve and then remove the zerk and put the screw back in?

PorFin 10-29-2012 11:41 PM

Re: Seacocks
 
Quote:

Originally Posted by Ajay73 (Post 939988)
MS, could you use the grease zerk, grease the valve and then remove the zerk and put the screw back in?

That's the idea. As MS said, leaving a zerk in there permanently is asking for trouble.

Maine Sail 10-30-2012 08:19 AM

Re: Seacocks
 
Quote:

Originally Posted by Ajay73 (Post 939988)
MS, could you use the grease zerk, grease the valve and then remove the zerk and put the screw back in?

It does not do a proper greasing and lubing of a tapered cone valve and standard ball valves don't require greasing. It might be a short term band-aid for a tapred cone but they still require dissasembly, cleaning lapping and greasing ever few years.

Ajay73 11-04-2012 06:29 AM

Re: Seacocks
 
I opened the drain nuts but didn't get any water draining out on its own. I twisted up a piece of paper towel and and inserted it into the drain hole and there was a bit of water in there, not very much at all. I would assume that what water is in there is not very much. Correct?


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