The Baxi 720778201 is a genuine OEM expansion vessel connection hose designed for selected Baxi EcoBlue and Potterton Neta-tec boiler models. This flexible, high-pressure hose links the expansion vessel to the hydraulic circuit, ensuring stable pressure management and safe system operation.

Over time, hoses can become blocked, kinked, or degraded, leading to pressure fluctuations, PRV discharge, system instability, or boiler lockouts. Replacing a worn hose with this genuine Baxi part restores correct pressure regulation and reliable heating performance.

Key Features:

• Genuine Baxi expansion vessel hose

• Connects the expansion vessel to the boiler’s hydraulic system

• Ensures stable system pressure and safe expansion management

• Designed for EcoBlue & Neta-tec ranges

• Helps resolve pressure loss, PRV discharge & expansion faults

• Durable, heat-resistant and pressure-rated construction

• Direct-fit replacement for quick, professional installation

Compatibility

The Baxi 720778201 Hose is compatible with:

• Baxi EcoBlue boilers

• Potterton Neta-tec boilers

• Any boiler listing 720778201 in its official parts documentation

Common compatible models include:

• EcoBlue Combi / Heat / Advance

• Neta-tec Combi & System boilers

Installers should always confirm exact compatibility using the boiler’s service manual or parts guide.