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

Edson Universal Pumpout Nozzle with Splash Guard - 27220

Whitecap Deck Fill

Whitecap Pull Up Deck Fill

Groco Adjustable Collapsible Spanner Wrench - SW-2531

Plastimo Stainless Steel Winch/Deck Filler Key - 61804

Dometic NozAll Deck Pump-Out Adapter

Whitecap Deck Fill Cap Replacement with Chain - 6061C

Whitecap Replacement Nylon Deck Fill Cap

Seachoice Self Bailing Scupper

Davis Instruments Snap Tool Multi-Key - 382

Whitecap Push Up Deck Fill

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

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

Groco SCUS Series Hose Barb Deck Drain

Sea-Dog Scupper Valve - 520500-1

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

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

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

Whitecap Nylon Deck Fill

Whitecap Stainless Steel Waste Fill Adapter - 6126ADPT

Whitecap Replacement Push Up Deck Fill Cap

Perko Fuel System Replacement Locking Gas Cap - 1324DP1BLK

White Water Wire Deck Plate Key - 1350KY

Whitecap Replacement Deck Fill Key - 6060C

T-H Marine All Purpose Drain/Hatch Drain

Forespar CF251S Marelon Mushroom Head Thru-Hull with Screen - 906013

Forespar Replacement Waste Deck Fill - 907004

Seachoice Stainless Steel Deck Fill with Cap

T-H Marine Push-In Overflow Drain Tube

Seachoice Gas Deck Fill with Vent & Cap - 32061

Perko Deck Fill - 1313DP0CHR

T-H Marine Flush Mount Scupper Valve Assembly

Perko Locking Gas Fill - 1399DP0CHR

Forespar CF254 Flush Head Deck Drain with Hose Tailpipe - 906038

Forespar Replacement Water Deck Fill - 907003

Seachoice Scupper Valve - 18261

Seachoice Deck Plate Key and Tool - 32671

Seachoice Pry-Up Deck Plate

Perko Flush Mount Cockpit Scupper - 0285DP

Perko Chrome Plated Straight Neck Vented Deck Fill

Perko Waste Deck Plate - 1269DP0CHR

Perko Vented Gas Fill

Whitecap Angled Scupper with Barb - 6559

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

Perko Locking Deck Fill - Diesel - 0599DPDCHR

Perko Locking Deck Fill - Gas - 0599DPGCHR

FillGuard Deck Fill Protection Devices - 3 Pc Gasoline Set - GASOLINEKIT

Centek Vernay Scupper Drain Fitting

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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