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> Plumbing > Remove category: Seacocks and Ball Valves

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  • 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: $31.65 to $119.23
  • Groco 316 S/S Tri-Flange Adapter Base

    Groco 316 S/S Tri-Flange Adapter Base

    This patent-pending Groco IBVF Stainless Steel Flanged Adaptor solves many age-old problems in the...

    Price: $49.94 to $169.74
  • Johnson Pump Y-Valve

    Johnson Pump Y-Valve

    Johnson Pump Y-Valve is designed to be installed in a waste systems, and controls flow allowing...

    In Stock 

    Price: $80.98
  • Groco E-Valve LCD-5 Touchscreen LCD Monitor

    Groco E-Valve LCD-5 Touchscreen LCD Monitor

    The Groco E-Valve LCD-5 is a touchscreen LCD monitor that allows wireless, helm-based remote...

    Price: $1347.84
  • Groco E-Valve Motorized Seacocks

    Groco E-Valve Motorized Seacocks

    Groco motorized seacocks provide easy push-button control from the engine room. Open and close upon...

    Price: $1169.91 to $1781.01
  • Conbraco Shut-Off Ball Valves

    Conbraco Shut-Off Ball Valves

    Conbraco Shut-Off Ball Valves are surface mounted, and have a 400 psi service rating. The valves...

    In Stock 

    Price: $30.56
  • 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: $122.96 to $403.76
  • Perko Inline Valve

    Perko Inline Valve

    Cast bronze Perko inline valves come with a drain plug, bonding screw, and ball valve for smooth ope...

    In Stock 

    Price: $316.88
  • Buck Algonquin Ball-Type Seacock

    Buck Algonquin Ball-Type Seacock

    Buck Algonquin Bronze full flow ball-type seacocks feature a low profile drain & grounding...

    In Stock 

    Price: $138.39 to $979.89
  • Buck Algonquin 316 Stainless Ball Valves

    Buck Algonquin 316 Stainless Ball Valves

    316 Stainless steel ball valve with 316 stainless steel body. Vinyl Coated Stainless Steel Handle....

    In Stock 

    Price: $38.79 to $517.24
  • Conbraco Apollo Sea Flange Type Ball Valve

    Conbraco Apollo Sea Flange Type Ball Valve

    Apollo bronze ball valves replace older style sea cocks....

    In Stock 

    Price: $114.67 to $322.63
Items: 17 - 27 of 27 | Pages: Previous  1  2 
 

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 compliant 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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