Attwood 800 GPH 12V Shower Sump MK2 System

The Attwood 800 GPH 12V Shower Sump MK2 System provides higher-capacity gray-water pumping for marine showers and other compatible onboard drains. The enclosed sump collects incoming water and uses its 800 GPH pump to move it to the boat's designated discharge point when gravity drainage is not practical.

Attwood's MK2 design promotes unrestricted flow through the box while keeping service access simple with a removable snap-on lid. The cover is gasketed to help manage overflow, and an integrated air vent allows air to escape rather than becoming trapped around the pump. This higher-output model draws 2.5A and requires a 5A fuse.

Plan the installation around the drain-hose sizes, discharge routing, 12V power connection, fuse protection, venting, and future access for cleaning. Secure the sump so the lid remains reachable, inspect the interior and strainer area regularly, and verify proper automatic cycling with clean water before placing the system into normal service.

• 800 GPH pumping capacity for higher-flow gray-water applications
• 2.5A current draw with 5A fuse requirement
• Gasketed snap-on lid supports cleaning and overflow control
• Built-in vent helps air escape for more consistent pump operation

Browse more bilge and water pumps.