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Hi Following on from my Economy 7 Immersion and Cylinder post I think i'm going to replace the 16 yr old system. Can anyone recommend an unvented mains pressure cylinder with two immersions (at least 120 litres). If the E7 immersion is currently hard wired into the fuse box would the new one...

Hello I have an Economy 7 immersion and cylinder. I have hot water Thursday to Sunday but then Monday to Wednesday its lukewarm. I'm trying to get to the bottom of it without changing the system but struggling somewhat. Should I have a control unit somewhere? I've got a boost control in the...