GROCO Backing Block for 2 and 2.5-Inch Seacocks

The GROCO Backing Block for 2 and 2.5-Inch Seacocks gives controlled fluid routing or positive shutoff in a compatible marine plumbing system. Its bronze or stainless construction and full-flow internal passage are built to manage onboard water, waste, or fuel service as specified for the particular valve configuration.

Model-specific handle positions and port arrangements make it easier to identify the selected flow path, isolate a line, or choose between connected tanks. Service-oriented handle and mounting features also help operation in crowded machinery and bilge spaces where direct access can be limited.

Confirm port size, thread type, fluid compatibility, mounting orientation, handle clearance, bonding requirements where applicable, and service access before installation. Use compatible fittings and sealants, label selector positions clearly, exercise the valve periodically, and inspect the completed plumbing for smooth operation and leaks. See what else we carry in bilge and water pumps.

• The valve gives a defined path through compatible marine plumbing.
• Handle geometry helps identify the active or closed flow path.
• Construction is selected for the specified water, waste, or fuel application.
• Service-oriented handle features help in confined installation spaces.