Deck Fills & Drains

About Deck Fills & Drains

Cockpit Drains & Scuppers

Defender Marine offers a variety of cockpit drains, self-bailing scupper drains, and thru hulls with scupper valves. Thru hull valves and deck scuppers can be installed above or below the waterline and are offered in a polymer composite called Marelon, injection-molded nylon, or molded fiberglass.

Self bailers take the guess work out of cockpit drains.

When a boat is underway the pressure of water running out through the scupper opens a one-directional valve to release the water from the hull. When the scupper is closed, during rest, no water can leak into the boat. Self-bailers assist bilge pumps in keeping the hull free of excess water and are especially helpful on boats that are "wet" or take on water and spray while running.

What are deck drains made of?

Defender Marine offers scupper drains fabricated out of a variety of materials. Marelon is a polymer composite that never cracks or loses its shape, while injection-molded nylon is strong and UV resistant. Molded fiberglass cockpit drains, as well as polycarbonate boat scuppers, offer a few more options while shopping for scupper drains.

I've got a new scupper, now what?

Installation above the waterline is not complicated and can be a DIY project - just remember to measure twice! Also, examine that boat scupper drain that you have purchased and be certain that it will work for your application. Hose barb or threaded connections are questions that need to be answered before the project starts, as cockpit drains and scuppers must be plumbed to exit the hull. Be certain the project is completely prepped, and all gasket materials are ready to go before you start!

Deck Fills & Drains

Dometic NozAll Deck Pump-Out Adapter

Seachoice Self Bailing Scupper

Sea-Dog Scupper Valve - 520500-1

Sea-Dog Thru Hull with Scupper Valve - 520510-1

Seachoice Pry-Up Deck Plate

Seachoice Splashwell Drain Tube - 19121

Seachoice Scupper Valve - 18261

Seachoice Splashwell Drain Tube - 19131

Seachoice Drain Tube

Seachoice Deck Plate Key - 32651

Seachoice Deck Plate Key and Tool - 32671

Seachoice Gas Deck Fill with Cap & Strap Tether - 32011

Seachoice Gas Deck Fill with Cap & Beaded Chain Tether - 32041

Seachoice Gas Deck Fill with Locking Cap - 32051

Seachoice Gas Deck Fill with Vent & Cap - 32061

Seachoice Nylon Deck Fill with Cap

Seachoice Stainless Steel Deck Fill with Cap

Seachoice Deck Fill Replacement Cap

Seachoice Twist 'n' Lock Deck Plate

About Deck Fills & Drains

Cockpit Drains & Scuppers

Self bailers take the guess work out of cockpit drains.

What are deck drains made of?

I've got a new scupper, now what?

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