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

Whitecap Hose Deck Fill

Whitecap EPA Pull-Up Hose Deck Fill

Whitecap Push Up Deck Fill

Whitecap Deck Fill Cap Replacement with Chain - 6061C

Whitecap Replacement Nylon Deck Fill Cap

Whitecap Pipe Deck Fill

Whitecap Nylon Deck Fill

Whitecap Replacement O-Ring for Deck Fill Cap - 6061OR

Whitecap 30 deg. Angled EPA Pull-Up Hose Deck Fill

Whitecap EPA 1/4-Turn Pull-Up Cap with Chain

Whitecap Replacement Push Up Deck Fill Cap

T-H Marine Cockpit Scupper Drain - CSD-92-DP

T-H Marine Large Rectangular Scuppers - LRS-2-DP

Whitecap Gas Hose Deck Fill with Splash Guard - 6001

T-H Marine Flow-Max Ball Scupper - FMS-1-0-DP

Whitecap Replacement Deck Fill Key - 6060C

Whitecap Stainless Steel Waste Fill Adapter - 6126ADPT

T-H Marine Push-In Overflow Drain Tube

T-H Marine Scupper Flapper Repair Kit - FSRK-3-DP

Whitecap EPA Pressurized System Deck Fill

Whitecap Livewell Drain Thru Hull

T-H Marine Flush Mount Scupper Valve Assembly

T-H Marine All Purpose Drain/Hatch Drain

T-H Marine Floor Drain and Vent

Whitecap Brass Screw Type Bailer Plug

Whitecap Pull-Up Hose Deck Fill

Whitecap Self-Captive Garboard Drain Plug pkg

Whitecap Replacement Deck FIll Cap and Chain - 6074C

Whitecap Transom Well Drain Tube - S-3818C

T-H Marine Drain Plug

T-H Marine PVC Push-In Drain Plug

T-H Marine Overflow Drain Tube - ODT-2T-DP

Whitecap Angled Scupper with Barb - 6559

Whitecap Nylon Garboard Drain Plug - 3051BC

Whitecap Garboard Drain & Plug - S-5051C

Whitecap Stainless Steel Screw Type Bailer Plug - S-0291C

Whitecap Brass Snap-Lever Type Bailer Plug

Camco Water Pressure Regulator - 40055

Whitecap Garboard Drain Plug - 6351C

Whitecap Brass Drain Tube - S-5064C

Whitecap Nylon Deck Fill Replacement Cap

Whitecap Aluminum Turn Type Bailer Plug - S-0288

Whitecap Tee Handle Drain Plug with Stainless Steel Cable & Nut - S-0242C

Whitecap Aluminum Snap-Lever Type Bailer Plug

Whitecap Aluminum Screw Type Bailer Plug

Whitecap Garboard Drain Replacement Plug - 6352C

Whitecap Self-Captive Garboard Drain Replacement Plug - 6354C

Whitecap Tapered Hose Deck Fill

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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