Hot water issue

[James 1981]

Hi there I am having trouble with hot water coming through cold taps
its on an unvented system in a large house with over 4 bathrooms
I have installed a secondary return on system with a bronze pump going back into
cold main at cylinder via a swept tee
and also a non return valve to prevent back flow to cold

I have tried everything even fitting non return valves on all appliances I can get to
it's a new install and I have piped it all myself

I think I might have teed a pipe in wrong
ie hot return into cold
but surely if I isolate the cold and leave the hots on I would have a flow of water through the cold side of taps

I'm after any advise people
thanks for your time

 

[Last Plumber]

You don't sound as though you are qualified or competent to be working on that to be frank.

You need an engineer who is G3 compliant!

 

[Last Plumber]

You don't sound as though you are qualified or competent to be working on that to be frank.

You need an engineer who is G3 compliant!

 

[townfanjon]

James , Sorry , you have to be qualified to instal an unvented cylinder, so we cant give you any advice

 

[James 1981]

Sorry guys you have lost me I'm new to this site so not sure if I have entered my details correctly
I have all relivant qualifications for unvented and gas safe etc
Regards

 

[townfanjon]

Sorry guys you have lost me I'm new to this site so not sure if I have entered my details correctly
I have all relivant qualifications for unvented and gas safe etc
Regards

James , one of the mods will see this and advise u .

 

[townfanjon]

Sorry guys you have lost me I'm new to this site so not sure if I have entered my details correctly
I have all relivant qualifications for unvented and gas safe etc
Regards

James , one of the mods will see this and advise u .