Just when I thought I had figured out what I was doing, I've been looking at the boiler again. The HW side is easy to get at but the CH side is squashed next to a cupboard. To rearrange the plumbing means taking the cupboard out, only the oven is on top!
I'm wondering whether to leave the CH as it is and just add a valve and a second motor in the airing cupboard on the HW.I know it's not ideal using two pumps when I could use only one but it might save dismantling half the kitchen. Do I need a two port valve on the CH to switch that offor is flow minimal when the pump is off?
Thanks.