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Thanks heatingman, you've revived some optimism! Just found a pdf of the Potterton install and it states 'pump may be fitted on either the flow or return...'. Now my worry is the long horizontal run on the flow/vent..... I know it has been alright for 30 years, serving three boilers. But can I...

Sorry - thought I had posted reply but seemed not to get through. Thanks for advice re S plan, which I just checked on Honeywell. But as far as location is concerned, boiler and cylinder will remain much where they are - so there will still be a 5 metre run of pipe which is only a couple of...

If anyone is still passing by this thread, I'm now concerned about near-horizontal length of the vent pipe. This is 28mm flow and vent from boiler. Altogether it makes a vertical rise of c 4metres, but runs near-horizontal for over 5 metres - and goes through five 90 degree elbows. It's been...

Yep, the Boss in the household might not be happy, since the area in question - Sod's Law - has just been redecorated, but maybe I need to put in a ceiling conduit or a bit of disguising cornice. Means drilling through a 4 inch block wall and a solid 13 inch brick wall, but hey ho. I guess we...

I was afraid that might be a question! We are revamping the bathroom where the cylinder sits, so it seemed a good time. The cylinder has to be moved several feet. It is uninsulated, and only about 130 litres. We have no controls on the system - no cylinder stat or valve on the rpimary return. We...

I'd be grateful for some professional advice - can't think my way any further on this. We have old-style vented gravity DHW and pumped CH system with little in the way of controls. Boiler is only 6 years old and fine, and I prefer to stay vented. There are reasons why I have to upgrade the...