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> Plumbing > Remove category: Seacocks and Ball Valves

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Items: 1 - 15 of 27 | Pages: 1  2  Next 
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  • Groco Bronze In-Line Ball Valve, Seacock attachment

    Groco In-line Ball Valves

    Groco bronze in line Ball Valves are designed for long service in the harsh marine environment....

    In Stock 

    Price: $15.17 to $491.35
  • groco seacocks

    Groco FBV Bronze Seacocks Tri-Flange Base

    Groco seacocks with tri flange base and ball-type valve. Bronze body with chrome plated solid brass...

    In Stock 

    Price: $10.97 to $386.00
  • Bronze Seacock

    Buck Algonquin Seacock

    Bronze ball-style seacock from Buck Algonquin with teflon rings, vinyl coated steel handle. Quarter...

    In Stock 

    Price: $32.94 to $85.99
  • bronze ball valve

    Buck Algonquin Ball Valves

    Buck Algonquin Bronze ball valves for marine plumbing applications. Designed for full flow usage....

    In Stock 

    Price: $14.61 to $133.42
  • Forespar Marelon Flanged Seacocks

    Forespar Marelon Flanged Seacocks

    Forespar Marelon Flanged Seacocks are a formulation of glass-reinforced Dupont Zytel optimized for...

    In Stock 

    Price: $46.00 to $103.83
  • groco bronze seacock

    Groco BV Bronze Full-Flow Tri-Flange Base Seacocks

    Groco Tri-Flange Base, ball-type seacocks. Bronze body with 316 stainless steel ball and PTFE Seats...

    In Stock 

    Price: $116.00 to $1963.08
  • Forespar Marelon Ball Valves

    Forespar Marelon Ball Valves

    Forespar Marelon Ball Valves are a formulation of glass-reinforced Dupont Zytel optimized for...

    In Stock 

    Price: $46.45 to $217.22
  • Groco Safety Seacock Conversion

    Groco SSC Engine Flush Kit

    Designed to be added to an existing seacocks for instant bilge pumping and simplified...

    In Stock 

    Price: $76.94 to $200.20
  • Jabsco Y-Valve

    Jabsco Y-Valve

    The Jabsco Y-Valve allows waste to be pumped directly into a holding tank or diverted to a...

    In Stock 

    Price: $65.32
  • Groco Bronze Tri-Flange Adapter

    Groco Bronze Tri-Flange Adapter Base

    Eliminates common (and dangerous) thread mis-match when in-line valves are screwed onto thru-hulls. ...

    In Stock 

    Price: $33.79 to $101.59
  • Apollo Ball Valves

    Apollo Ball Valves

    Apollo ball valves are made from cast bronze with a stainless steel handle and stem nut. Ball is...

    In Stock 

    Price: $25.22 to $131.01
  • Forespar Marelon Y-Valves

    Forespar Marelon Y-Valves

    Forespar Marelon Y-Valves and Connectors are molded of high strength glass-reinforced Marelon....

    In Stock 

    Price: $54.01
  • Perko Ball Valve Type Bronze Seacocks

    Perko Ball Valve Bronze Seacocks

    Bronze Perko ball valve seacocks include thru-hull fitting, hose adapter, drain plug, four...

    In Stock 

    Price: $147.78 to $335.96
  • Groco Stainless Steel In-line Ball Valves

    Groco Stainless Steel In-line Ball Valves

    Groco In-line Ball Valves have rugged 316 stainless steel body construction designed for long...

    In Stock 

    Price: $26.24 to $728.16
  • Perko Bronze Seacock Body

    Perko Bronze Seacock Body

    Perko bronze seacock ball valve suitable for applications that require long, scoop or flush type...

    In Stock 

    Price: $113.16 to $370.64
Items: 1 - 15 of 27 | Pages: 1  2  Next 
 

Seacocks and Ball Valves

Seacocks are a crucial component of any well designed boat plumbing, engine cooling or water ballast system. Seacocks can be used to control the inflow or outflow of water and should be considered mandatory for all below-the-waterline connections. Seacocks may be constructed using a ball valve but NOT all ball valves are seacocks.

A true seacock features a flange that is bolted (or screwed) to a fairing block afixed to the hull. Top quality seacocks are manufactured by Groco, Buck Algonquin and Perko in marine grade bronze. Forespar manufactures seacocks in Marelon that is a formulation of glass-reinforced Dupont Zytel. All are ABYC approved for marine use.

Most seacocks feature NPS (straight) threads on the flange (hull) side with NPT (tapered) pipe threads on the top side. Marelon seacocks feature NPS (straight) threads on both sides. Forespar offers Marelon hose fittings with NPS (straight) threads that are designed to work with their seacocks.

Ball Valves operate with a quarter turn similar to a seacock, but are not designed to be attached directly to a thru-hull fitting. Most ball valves feature NPT (tapered) threads on both ends and are compatible only with tapered pipe fittings.

Ball valves are suitable for liquid control applications within the boat hull. Ball valves are superior in function to old-fashioned gate valves. Ball valves offer rapid action and provide positive visual feedback whether open or closed.

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