@plumbingdoctors: We replaced the defective 3 port valve and weak pump with the valves on this vented system by buging (without draining down) Someone suggested a flush which was carried out by previous engineer but this not help. After replacing the parts it has helped resove some of the issues but more work is still required. #3portvalve #grundfos #heating

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Sunday 03 September 2023 08:50:47 GMT