Glowworm Eden CB Boiler Sanitary Block 3 Way Diverter Valve 802131 2000802131

Product Overview

The Glowworm Boiler Sanitary Block 3 Way Diverter Valve (Part Numbers: 802131 / 2000802131) is a hydraulic component intended for selected Glowworm Eden CB combination boilers.

The sanitary block forms part of the boiler's domestic hot water and hydraulic control arrangement, working with the associated diverter valve mechanism to manage water flow during central heating and hot water operation.

The diverter valve system directs heated primary water through the appropriate circuit according to the boiler's operating demand.

Correct operation of the hydraulic assembly is important for maintaining reliable water distribution and normal central heating and domestic hot water performance.

ℹ️ Product Condition Options:

This part may be available in New or Refurbished condition. Please select your desired option from the dropdown menu above. Refurbished hydraulic components should be professionally inspected and tested for correct operation and leakage before installation.

Technical Insight & Common Failure Symptoms

The sanitary block is part of the boiler's hydraulic arrangement and is associated with the three-way diverter valve system.

The diverter mechanism controls the direction of heated primary water, allowing the boiler to respond to central heating and domestic hot water requirements.

Over time, internal components, seals and moving parts may become worn, damaged or restricted, potentially affecting water flow and valve operation.

Possible symptoms that may indicate a diverter valve or associated hydraulic component problem include:

• Domestic hot water failing to reach the required temperature.

• Central heating failing to operate correctly.

• Radiators warming unexpectedly during domestic hot water demand.

• Intermittent or inconsistent domestic hot water performance.

• Diverter valve sticking or failing to change position correctly.

• Water leakage around the sanitary block or its connections.

• Restricted or incorrect water flow through the associated hydraulic circuits.

• Visible corrosion, damage or deterioration affecting the assembly.

These symptoms do not necessarily confirm a faulty sanitary block or diverter valve, as similar problems may result from the actuator, flow detection components, circulation issues or other hydraulic controls. Correct professional diagnosis should be carried out before replacing the component.

Safety Advice

Boiler sanitary blocks and diverter valve assemblies should only be inspected, removed or installed by a suitably qualified heating engineer. Where the work involves gas appliance safety systems, a Gas Safe registered engineer with the appropriate qualifications must carry out the work.

Always isolate the appliance's electrical supply and relevant water connections before carrying out any work. Allow the system to cool and safely release residual pressure before removing the component.

Follow the manufacturer's installation and servicing instructions. Ensure that all required seals and connections are correctly fitted and complete appropriate leakage, pressure, circulation and operational safety checks before returning the boiler to service.