ualified Boat Safety Scheme (BSS) examiner for inland waterway vessel inspections

Gas Safe Registered engineer for marine LPG gas installations and safety certificates

OFTEC certified technician for marine diesel heating and oil-fired appliance servicing



Providing a reliable source of hot water is a fundamental requirement for a comfortable life on the inland waterways. For many narrowboat owners, an LPG-powered instant water heater is the most technically efficient solution, as it provides hot water on demand without the need to run the engine or deplete a limited domestic battery bank. At Marine Heating Solutions, we specialise in the professional integration of specialist hot water systems, ensuring that your galley and shower installations are both high-performing and safe.

The Specialist Difference: Professional Water Heating Integration

Installing a gas water heater in the confined environment of a boat requires a precise engineering approach to manage combustion air and flue gas exhaust. Our technical services ensure that your water heater kit is part of a holistic, BSS-compliant gas system.

  • Correct Flue Termination: We ensure that all water heater kits include the correct vertical or balanced flue kits to prevent CO ingress into the cabin.
  • Pressure-Balanced Performance: Our installations account for the vessel’s water pump pressure and flow rates, ensuring the burner ignites reliably even at lower domestic pressures.
  • Marine-Grade LPG Connections: We utilise mechanical joints and vibration-resistant copper pipework to prevent gas leaks in the challenging environment of a moving vessel.


We supply and install the primary industry standard for marine LPG water heating:

Morco Logo

Morco: The undisputed leader in narrowboat LPG water heating. Models like the D61B and G111 are engineered specifically for marine use, offering reliable instant hot water.

Our Water Heater Narrowboat Kits

See all our compatible water heater narrowboat kits in no particular order below. This is a collection of professional-grade models and installation kits; for detailed technical specifications and manufacturer-specific options, please follow the main menu to our brand pages.


Safety/Regulatory: OFTEC, GasSafe, and Canal & River Trust (CRT)

To maintain your Canal & River Trust (CRT) license, your water heater must pass the Boat Safety Scheme (BSS) inspection. This involves checking for correct flueing, adequate ventilation, and the presence of a dedicated gas isolation valve.

As GasSafe registered engineers with marine competencies, we certify that every water heater installation complies with BS EN ISO 10239:2025. Our “right first time” philosophy ensures your system adds value to your vessel while providing safe, reliable hot water for your crew.

A professional GasSafe-compliant installation of a Morco D61B LPG water heater on a narrowboat bulkhead, featuring a white vertical flue and a central gas isolation valve.
This Morco D61B installation demonstrates professional marine plumbing standards, including a vertical flue and a centrally located gas isolation valve with mandatory GasSafe and BSS compliance.