Attwood Automatic Bilge Pump

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Attwood Automatic Bilge Pump


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Attwood Automatic Bilge Pump

An automatic-switch bilge pump is a requirement for any vessels 20′ and over with sleeping accommodations, but is a great convenience for any size boat. The Attwood Automatic Bilge Pump has everything contained in one compact yet durable package – pump, wire seals, strainer, and also mercury-free switch – and installs quickly and easily in tight spaces. Pumps include 36″ lengths of 16-gauge caulked and tinned copper wire.


  • Mercury-free switch
  • Test knob for easy operational check
  • Non-restrictive float movement
  • Larger filter area resists clogging
  • Free flow of water around housing keeps motor cool
  • 316 Stainless Steel motor shaft for saltwater corrosion resistance
  • Durable high-impact, glass-filled polyester impeller


  • S500 has plenty of pumping power most jobs. 500 GPH* at open flow, 350 GPH* at 3.3’ head. Draws only 1.5-amps at open flow!
  • S750 is sized for larger recreational boats. Our most powerful 3/4”-outlet automatic pump. 750 GPH* at open flow, 625 GPH* at 3.3’ head. 3/4″ hose outlet.
  • S1100 is our most powerful and efficient automatic pump. High capacity for larger boats and yachts. 1100 GPH* at open flow, 973 GPH* at 3.3’ head. 1-1/8” hose outlet.

Check out more Bilge as well as Freshwater Pumps here.