Glow-Worm 20118195 Bypass | Genuine Replacement Spare Part

Glow-Worm 20118195 Bypass | Genuine Replacement Spare Part

Genuine Glow-Worm 20118195 hydraulic bypass valve for compatible Glow-Worm boilers. Maintains minimum water flow around the boiler circuit when zone valves close, preventing pump overload and overheating. Gas Safe registered engineer required.The price shown includes FREE DELIVERY.
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