I have central heating but no hot water

[Abuali]

You need to find out of your cylinder stat is “ getting a live “ , has anybody knocked it , is it an unvented cylinder?

How can it be unvented cylinder if there is only 3 port valve. Correct me if am wrong on that if it’s unvented cylinder then there must be a two zone valve also after the 3 port Y plan.

 

[townfanjon]

How can it be unvented cylinder if there is only 3 port valve. Correct me if am wrong on that if it’s unvented cylinder then there must be a two zone valve also after the 3 port Y plan.

Yes it should..



Appologies wrong post, my fault

 

[ShaunCorbs]

How can it be unvented cylinder if there is only 3 port valve. Correct me if am wrong on that if it’s unvented cylinder then there must be a two zone valve also after the 3 port Y plan.

That’s if it’s been done to regs and not a bodge install

 

[Kotek Besar]

Hi folks.

Better photo attached.

 

[SJB060685]

That’s if it’s been done to regs and not a bodge install

@ShaunCorbs do regs say you need a 2 port zone valve as well as a 3 port? That’s what I’m getting from this!?

 

[ShaunCorbs]

@ShaunCorbs do regs say you need a 2 port zone valve as well as a 3 port? That’s what I’m getting from this!?

Yes but I’ve come across 5 in the last year that don’t eg needed to be upgraded

 

[SJB060685]

Yes but I’ve come across 5 in the last year that don’t eg needed to be upgraded

When I did my G3 14 years ago it was a simple 2 port on return. What’s the reason for this additional zone valve?