Gledhill ES indirect unvented cylinders - any good?

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10 May 2020
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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 slimeline cylinders, that would be the answer, but alas they don't.

I've come across the Gledhill ES range which at 53cm diameter should just about fit through the loft hatch and this appears to be a standard type and not a slimline version (I notice slimlines tend to be less efficient and longer re-heat times).

Thing is which is putting me off is they are so cheap! At around £450 they are less than half the price of most others cylinders.

Anyone have any experience with them in terms of their quality? I did come across a forum post where someone reported theirs had imploded but I was hoping that is a one off!
 
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Fitted quite a few , get what you pay for and that would be the fact you need to supply your own compression fittings, comes with the usual Caleffi group set like most will supply, Esi 2 port valve and ev. Never had any problems with them.
 
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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 be very happy.

I suspect I'll make an order and see how I get on. I'll make sure to report back as and when.
 
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 expecting a cheaper brand.

Will report back once installed.
 
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 out to get it up in the loft - went back on without any leaks etc and feels solid.
 

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