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

Ronstan Andersen Automatic Bailer

SHURflo Wall Mount Pressure Reducing Water Connection - 183-029-14

Whitecap EPA Pull-Up Hose Deck Fill

Whitecap Push Up Deck Fill

Whitecap Replacement Deck Fill Key - 6060C

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

T-H Marine Push-In Overflow Drain Tube

T-H Marine PVC Push-In Drain Plug

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

Groco Garboard Drain with Plug

Jabsco Flush Mount Water Pressure Regulator - 44411-2045

Nuova Rade Adjustable Flip-Up Drain/Bailer Plug - 45309

Sea-Dog Scupper Valve - 520500-1

Sea-Dog Snap Handle Drain Plug - 520070-1

Forespar Garboard Drain Flange with Plug

Groco Adjustable Collapsible Spanner Wrench - SW-2531

Dometic NozAll Deck Pump-Out Adapter

Whitecap Nylon Garboard Drain Plug - 3051BC

Whitecap Tee Handle Boat Drain Plug with Cable - S-0211C

Perko Plastic Straight Neck Vented Deck Fill - 0543DPGBLK

Perko Adjustable Deck Plate Key - 0826DP0CHR

Perko Waste Deck Plate - 1269DP0CHR

Perko Vented Gas Fill

Whitecap Pipe Deck Fill

Forespar MF 830 Deck Fill

Whitecap Chrome Plated Zinc Hose Deck Fill with Splash Guard - S-7021C

Seachoice Gas Deck Fill with Vent & Cap - 32061

Whitecap Deck Fill Cap Replacement with Chain - 6061C

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

Whitecap Replacement Nylon Deck Fill Cap

Edson Universal Pumpout Nozzle with Splash Guard - 27220

Sea-Dog Replacement Drain Plug - 520041-1

Whitecap Hose Deck Fill

Plastimo Stainless Steel Winch/Deck Filler Key - 61804

Perko T-Handle Garboard Thru-Hull Drain Plug - 0363DP0PLB

Jabsco Water Pressure Regulator - 44411-1045

Seachoice Drain Tube

Whitecap Stainless Steel Waste Fill Adapter - 6126ADPT

Jabsco Water Pressure Regulator - 44412-1045

Sea-Dog Plugmate Garboard/Drain Plug Wrench - 520045-1

Seachoice Gas Deck Fill with Locking Cap - 32051

Whitecap Replacement Push Up Deck Fill Cap

Attwood Drain Plug Kit - 17211-3

Seaview Vault Series Transom Drain Plug - SV101V

Seaview Vault Series Pro Transom Drain Plug with Gasket and Garboard - SV101VP

Seaview InteliPlug Pro Captive Drain Plug & Garboard Assembly - SVIPPRO

Seaview InteliPlug ProXT Captive Drain Plug & Garboard Assembly Kit - SVIPPROXT

Vetus Wrench Key - VE87

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?

0Filters

Change Locale

Explore

Helpful Information

Get In Touch

Resources

Stay Connected