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Just to report back - I've installed the cylinder and all working well. The Vaillant stat is also working fine in the pocket. Overall I'm very impressed with the build quality of the cylinder and fittings etc - no issue at all tightening compression fittings and even had to take the immersion...

I did some very careful measuring and decided to get a Joule Cyclone 150L instead following your recommendation. It went through the loft hatch with literally 1mm to spare. First impressions are seems solid and well made, and comes with a honeywell 2 port valve which is pleasing - I was...

Thanks for the replies everyone. I had loooked at Joule Cyclone actually but the loft hatch is 535mm - Gledhill cyclinder is 530mm and the Joule's appear to be 540mm so too much. I did consider getting the hatch widened but that is somewhat of an escalation and I don't think 'er indoors would...

Anyone? :)

Hello, I've got a vaillant system boiler with a vented cylinder. I would like to upgrade to an unvented cylinder as I have good mains pressure however the vaillant cylinders are too wide to fit into the space and their slimline cylinders are crazy expensive. If vaillant did non-pre-plumbed...