Maretron 1.5" NPT Non-Displace Hull Focus Tube

The Maretron 1.5" NPT Non-Displace Hull Focus Tube is a precision marine instrument designed for boaters and anglers who demand reliable through-hull sensor integration without compromising hull integrity. This non-displacing design eliminates the need for traditional skin fittings that require large diameter holes, making it ideal for retrofit installations on existing vessels or new builds where minimal hull penetration is critical.

Built to Maretron's exacting marine standards, the 1.5" NPT Non-Displace Hull Focus Tube features a NPT (National Pipe Thread) connection that integrates seamlessly with standard marine plumbing and sensor systems. The robust construction withstands saltwater corrosion and the mechanical stresses of offshore operation, while the overall length of 44 inches accommodates various hull configurations and compartment layouts without requiring extensive structural modifications.

This hull focus tube is essential for anyone installing or upgrading marine electronics systems that require through-hull sensor placement—from fishfinders and depth sounders to water temperature sensors and pressure transducers. Whether you're running a fishing charter, cruising offshore, or managing a commercial vessel, this product serves as the foundation for accurate transducer readings and system diagnostics.