unvented cylinder problem

[Paul Cockhill]

Hello everyone

I was called to a house yesterday where a zip aquaflow direct unvented cylinder was discharging a constant drip through the tundish.

I checked the T and P valve and the expansion valve and they both seemed to be reseating themselves ok.

Then I checked the pressure on the expansion vessel and put it up to the required 3 bar pressure.

I did this 3 times and made sure that the pressure was still 3 bar on the expansion vessel

Despite all this the drip persists.

Any thoughts or ideas would be very welcome

thanks

paul

 

[AWheating]

bit of dirt on valve seating on one of the valves?

 

[lbp plg & htg]

Where was the leak from? I take it you undone both nuts downside of the safety valves to see which one was passing?

 

[buckley plumb]

have you got a g3 unvented certificate. this could happen if you get it wrong

Exploding Unvented Hot Water Cylinder.wmv - YouTube

 

[lame plumber]

replace which ever valve is leaking like for like from manuafacturers spares list

 

[ceshiwuhao]

Good, agree.

 

[Titanium Trades]

Got the same problem mate, I recharged the expansion vessel...replaced TPRV but still a discharge.... let me know if you fix this. Thanks

 

[lbp plg & htg]

Which valve is leaking? It makes it easier to resolve.

 

[chris watkins]

Hello everyone

I was called to a house yesterday where a zip aquaflow direct unvented cylinder was discharging a constant drip through the tundish.

I checked the T and P valve and the expansion valve and they both seemed to be reseating themselves ok.

Then I checked the pressure on the expansion vessel and put it up to the required 3 bar pressure.

I did this 3 times and made sure that the pressure was still 3 bar on the expansion vessel

Despite all this the drip persists.

Any thoughts or ideas would be very welcome

thanks

paul

Hi Paul
How did you check / adjust the pressure in the vessel ?? Was the water turned off & system pressure zero ?
Are you G3 ?

 

[Paul Cockhill]

Hi Paul
How did you check / adjust the pressure in the vessel ?? Was the water turned off & system pressure zero ?
Are you G3 ?

Hi

Yes I am G3 qualified and have fitted a number of cylinders mainly Megaflows and Tribunes, however not come across a Zip before, although the system is the same.

However I have not come across this problem before

I checked the pressure on the vessel with a [h=2][DLMURL="http://www.reginproducts.co.uk/flowandpressure/REGK30"]REGK30 - Pressure Vessel Pump[/DLMURL][/h]and put it up to the required 3 bar pressure

Yes the water was turned off

regards

Paul

 

[Paul Cockhill]

Thanks Titanium, looks like I will have to identify which valve it is leaking from before I do anything else.

Will update

Paul