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Hello All, Unfortunately, recently my Icos Ideal HE15 heat only boiler started to have more frequent faults and I'm thinking it is time for it to be changed. Heating system has recently been upgraded, September 2022, from Y-plan with vented cylinder to S-plan with unvented Gledhill 240l...

Hello All, Please advise if flow & return pipe in 2 pipe heating system should be connected together, as per below sketch: Main heating flow & return pipes are 22 mm with 3x 15 mm radiator connections on each, plus additionally the flow and return pipes are also connected together. I will be...