Glow-worm Pressure Reduction Valve 0020010152

The pressure reduction valve is a Glow-worm component used within the manufacturer's solar and unvented storage cylinder installations. It regulates incoming mains pressure down to a controlled level before the water enters the cylinder or associated system components. This protects the cylinder, its fittings and downstream controls from excessive supply pressure.

• Discharge or relief valve passing, indicating uncontrolled downstream pressure
• Noticeably higher or fluctuating pressure at hot outlets compared with previous behaviour
• Water hammer or noisy pipework on draw-off that was not present before
• Visible scale, corrosion or leaking from the valve body or its connections
• Reduced flow through the valve despite adequate mains supply pressure

• Confirm the appliance model against the fit list above, as the valve is specific to these cylinder and solar installations
• Check the valve body and any label on the existing part for the code 0020010152
• Inspect the surrounding pipework and connections for damage that may also need attention
• Verify the incoming mains pressure and any site requirements before fitting a replacement