Unvented help?

[petershire]

Hello all, I need some advice please?

I shut the gate valve next to the UV cylinder and drained down the tribume premier unvented system and replaced the faulty 18 litre expansion vessel ( white ) with an identical one ( generic red ) and opened up the gate valve and now have no water coming out the hot taps ( only an intermittant dribble at best )

The central heating was bled and is working fine as it the cold taps, the bar pressure is slowly going up and not ive shut it all down as it reached 2.5 bar in nearly 24 hours

Any ideas on whats gone wrong and how to fix please?

I would appreciate any help resolving the issues please?

 

[Mike Jackson]

Well you've broken the building regs and the water bylaws so I suggest you employ a G3 qualified plumber to come and rectify the problems you've created.

 

[SimonG]

As Mike said, you need a qualified engineer to repair this equipment. Why did you fit a red vessel?

 

[stratplus]

Out of interest and apart from the obvious, what is the difference between the hot and heating vessells?

 

[Rickster123]

As Mike said, you need a qualified engineer to repair this equipment. Why did you fit a red vessel?

Because it matched the carpet obviously!

 

[snowhead]

Out of interest and apart from the obvious, what is the difference between the hot and heating vessells?

Quality of the membrane.

 

[SimonG]

Potable and non potable applications.

 

[SimonG]

I got a bit of a shock the other day when replacing an expansion vessel, it was grey. Luckily there was a sign onnthe box 'dont panic, the colour has changed'

 

[stratplus]

Quality of the membrane.

Higher temp of heating water.

 

[stratplus]

Potable and non potable applications.

Would a heating vessell have an effect on the hot water (potable) side?

 

[SimonG]

Yep, the vessel will rust.

 

[stratplus]

Yep, the vessel will rust.

So a hot water vessell is made from a different material to a heating vessell?

 

[Atouchofgas]

The hw vessel will have been wras approved as it's potable water, so the membrane will not contain any contaminants so safe for human consummation ( so they say )

 

[SimonG]

Never dismantled a potable one, but I believe its more of a balloon inside the vessel so the rubber contains the water within the vessel rather than the shell.

 

[stratplus]

Fair enough, makes sense