Bosworth GH-M500D Guzzler 1 1/2 in. 12 GPM Flush-Mount Hand Pump Description The Bosworth GH‑M500D Guzzler® Flush‑Mount Hand Pump is designed for high‑capacity manual pumping in marine and sanitation applications where a clean, low‑profile installation is required. Engineered to mount flush below deck or behind walls up to 3/4 inch thick, this pump combines space efficiency with dependable performance. The durable acetal body and corrosion‑resistant internal components support long‑term operation, while the removable aluminum handle can be oriented in twelve different positions to accommodate various installation layouts. With a pumping capacity of up to 12 gallons per minute and smooth 1‑1/2 inch hose connections, the GH‑M500D delivers reliable flow for bilge or waste transfer while maintaining a streamlined appearance using a black or white trim ring. Features Flush‑Mount Design: Installs below deck or behind walls for a clean, low‑profile finish. High Flow Performance: Delivers up to 12 GPM at 90 strokes per minute. Adjustable Handle Orientation: Removable aluminum handle rotates into twelve positions for flexible installation. Durable Construction: Acetal pump body resists corrosion and wear in marine environments. Large Hose Compatibility: Supports hose sizes from 1‑1/4 in. to 2 in. Dual‑Color Trim Options: Cover plate available in black or white for finished aesthetics. Specifications Body Material: Acetal (POM) copolymer Clamp Ring Material: Acetal (POM) copolymer Cover Plate Material: Polypropylene Diaphragm Material: Nitrile Flow Rate: 12 GPM Handle Material: Aluminum Handle Style: Vertical, removable Head: 30 ft. Hose Connection Size: 1‑1/2 in. smooth (inlet and outlet) Internal Spring: None Lift: 12 ft.; 22 ft. with check valve Max Pressure: 15 psi Max Service Temperature: 212°F (100°C) Mounting Style: Flush mount Pump Type: Manual diaphragm hand pump Valves: Flapper (Nitrile) Weight: 2.50 lb. Downloads Specifications Sheet (PDF Download)
