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Shop Ariston isolation valves, including compatible flow and return valves for selected combi and system boilers. These valves allow sections of the heating circuit to be isolated during servicing or repair. Before ordering an Ariston flow or return valve, confirm the full boiler model, GC number and part number shown on the existing valve.
Ariston flow and return valves control the central-heating water entering and leaving the boiler. A leaking, seized or damaged isolation valve may cause pressure loss, poor circulation or water around the boiler connections.
Similar symptoms may also be caused by worn seals, damaged pipework, a faulty return unit or another internal leak. Flow and return valves can look similar, so confirm the correct position and part number before ordering.
Valve replacement should be completed by a suitably qualified engineer. Compare the existing valve reference with the product listing and check the full boiler model and GC number.
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