Unvented Cylinders Ticket

[Foodface]

Had a customer call today saying they had a Worcester Bosch engineer out for what they thought was a boiler problem, turned out the motorised valve on their unvented cylinder had gone. They asked me to do it and I said no, as I hadn't done the ticket. Don't really come across them much and we predominately do servicing work, is it even worth doing the ticket?

Just wondered what people thought like.

Nice one

Fodface

 

[mountainman]

I'm not entirely sure that you need G3 to change a motorised valve as its not part of the 'unvented' side of the system.
As long as the new valve was spring return, normally closed the same as the old one.
It probably only needs a new motor or head and it would be a bit drastic to need the G3 ticket to change either of these.

 

[Foodface]

I spoke to my training providers and they said I needed the ticket to work on it, thought it best not to meddle if I was unsure. Not got a great deal of work in so will be a bit annoyed if I did the wrong thing.

 

[Millsy 82]

You dont need a ticket to swap a 2 port valve that would be like saying you have to be gas safe to change a pump. You cant touch the cylinder expansion vessel or the bits on the cold main going to it like pressure reducing valve pressure relief etc etc.

 

[lame plumber]

two port on the coil is a safety device as well on an unvented and part of the system so the rules would say you need an unvented ticket.

 

[Howsie]

I agree with Lame as wrong as it sounds. On both counts

 

[lame plumber]

I agree with Lame as wrong as it sounds. On both counts

get back in your box, just like to tell it as it is occacionally when others havent quite got it right

 

[Foodface]

Ha ha ha, I always seem to start an argument. I thought you had to have the ticket to work and install componants directly to do with the relevant appliance.

 

[Koogatubac]

Lol

 

[mountainman]

I agree with Lame as wrong as it sounds. On both counts

I know that the industry is nuts, but needing G3 to change a synchron motor is truly mad.
I don't mind myself, as I have the G3 ticket but there is so much confusion in the industry that my last two callouts to 'unvented' cylinders turned out to be Gledhill Boilermates. Lol.

 

[Millsy 82]

two port on the coil is a safety device as well on an unvented and part of the system so the rules would say you need an unvented ticket.

Do you need boilers to change an external pressure vessel or prv? No. How is this any different? I agree it is a safety device but you dont need unvented to replace a 2 port valve.

 

[lame plumber]

so you know the hw mv is a safety device and part of the package then and how the rules should be applied.

 

[Millsy 82]

I will do some digging around tomorrow and find the answer. If you are correct then that is just stupid. How can you be able to work on a heating system but not be able to change a 2 port valve?

 

[lame plumber]

because its part of an unvented HW system, its like having to install a 2 port when installing an unvented cyl even though there may be a 3 port valve already in situ, its provided by the manufacturer so has to be installed,

 

[chris watkins]

Strictly speaking the 2 port is not the safety device, it is the over heat (energy cutout) thermostat which provides that function, I agree in most cases it would be linked to a spring return zone valve but this does not have to form part of the system.
This can best be seen in the Vaillant Un-vented cylinder which so long as it is installed & wired to one of their boilers does not have a two port / ECO, this function is accepted as being met by the boilers own high limit stat.