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Forespar Marelon Flanged Seacocks

$73.07Temporarily UnavailableSee Product Details
Forespar Marelon Flanged Seacocks

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Product Details

Marelon - Marine Grade Seacocks are optimized for marine use above and below the waterline with maximum UV inhibitors, and it will not support combustion. Additional marine benefits of the material are its extreme range of operating temperature and its resistance to abrupt changes in temperature.

Tech Specs
Item Number Thru-Hull Hose Barb Base Height
FOR-904010 3/4"3/4"3"3"
FOR-904011 1-1/4"1-1/2"6"5"
Info & Guides

New stem/handle design permits 180° rotation for opening in either direction.


All our valves are non-corrosive, but like any moving part in a marine environment, they required regular inspection and lubrication. Do not fail to actuate the handle and lubricate the seals on a regular schedule (water pump grease or even mineral oil will lubricate seals).

Bottom and top connections are NPS (straight) thread. The use of products with NPS (straight) pipe thread is recommended only for low pressure applications, and then only with a generous application of pipe sealant or PTFE thread tape.

All critical hose connections should be double clamped at both ends. Ideally, the hose clamp screws should be mounted opposite one another for maximum security. Use the highest quality AWAB hose clamps for longest life and best performance.

Technical Information

Marelon Advantages

  • Non-corrosive
  • Non-conductive
  • Fire resistant
  • Impact resistant
  • Temp. range is -40 to +176°F
  • UV resistant
  • Marelon is a formulation of glass-reinforced Dupont Zytel

Reviews for Forespar Marelon Flanged Seacocks

2 of 2 Reviews

January 7, 2013

By Marcelo from Chile

I recently bought a J105 with these Seacocks. It seems that the previous owners did not operated the seacocks for years. I currently have the boat in freash water and would like to lubricate the seacocks while the boat ius in the water. Is this possible? I also have had a problem with one of the seacocks. While I was opening it, I end up with the handle in my hand. The seacock remained closed. How can I address this problem?

Bottom Line Yes, I would recommend to a friend

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March 4, 2008

Excellent long life seacock
By PaulM from Portsmouth, RI

Marelon is a good substitute for bronze seacocks. It is unaffected by electrolysis- so there is no need for a bonding wire. Also, corrosion of any kind is not a problem. A light lube from time-to-time is all the service needed.

Bottom Line Yes, I would recommend to a friend

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