Lubricating seacocks??

gabosifat

Member III
Hi All,

Do people have opinions about what lubricant to use on seacocks? I'm redoing my head and have a chance to spray lubricant on the ball valves from inside. Any recommendations??

Thanks,
Steve Gabbott
E35/3 Silent Dancer
Vancouver
 

rwthomas1

Sustaining Partner
I like to use an acid brush and marine grease. From the outside I brush the surface of the ball with the valves closed. Then I open the valves halfway, reach up through the half opened ball and scrape some grease off on the top surface of the ball. Cycle the valves a few times and you're done. Another alternative is to pull the hoses off on the inside and use the acid brush method from there. This works when in the water too, with the valves closed obviously. RT
 

bayhoss

Member III
Grease

I use "Waterproof Grease" by Plumbmaster in Irving TX. (no connection). A very good product.

Best,
Frank
 

Chris A.

Member III
This is from Forespar's site (echoing advice given above):

Tech Tip
Marelon® - Marine Grade Plumbing Systems Valve Lubrication
As a follow up to previous Tech Tips; it is important to know that while Marelon® fixings are corrosion resistant, they do require twice yearly lubrication maintenance. These valves should be activated on a regular schedule. The handle should be moved throughout the open/close path every thirty days. Leaving a valve open or closed without moving the handle can cause freeze-up. This is true of any valve, including bronze. The law of nature is "use it or loose it".
To lubricate ball valves and seacocks while the boat is in the water you must:
Close valve.
Remove hose from tailpipe.
Remove remaining water from valve/tailpipe.
Swab waterproof grease (water pump grease, winch grease) or LanoCote™, generously, on ball.
Reattach hose, checking for fatigue and rusted hose clamps.
Activate valve a few times. When boat is hauled, you can perform steps 4-6 from outside the hull to lubricate opposite side of ball and seals.​


And a link to some other Marelon info:

Marelon history


Cheers,
 
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