COMMODORE 1100 GPH 12V Non-Automatic Bilge Pump Dual-Outlet Compatibility The COMMODORE CM-A31-1100B 1100 GPH Non-Automatic Bilge Pump provides reliable manual or float-switch-controlled bilge operation for small to mid-size vessels. Designed with dual outlet fittings (1" and 1-1/8"), a vented anti-airlock impeller, and a built-in check valve, it delivers smooth evacuation even in challenging plumbing layouts. The quick-connect motor and base system enables fast replacement without disturbing existing plumbing connections. Featuring a stainless-steel motor shaft, marine-grade sealed wiring, and ignition-protected submersible housing, this pump meets ISO 8846 and ISO 8849 standards for dependable marine service.