ball valve ch feed

[tripty]

Hi,

Is it a good idea to put a ball valve on the ch feed coming down from the f&e tank in the loft, on an old style vented ch system.

I'm asking because I had a difference of opinion with somebody else - I thought there is no harm in it but not essential whereas the over guy said its a no no as it could lead to somebody sealing the system. That would happen if it were combined feed and vent but otherwise...

I am right or wrong

Cheers

 

[kirkgas]

please translate this into english for me!!
if you mean a vale on the outlet from the tank then it is NO, NO and then NO again

 

[tripty]

please translate this into english for me!!
if you mean a vale on the outlet from the tank then it is NO, NO and then NO again

Thought it was in English
I mean a levered ball valve/gate valve, etc on outlet from the tank - why is that such a big no???

 

[kirkgas]

an open vented system is designed to replenish any water that leaks out or evaporates via the feed pipe, so if you close the valve thiss cant happen, system will get noisy, pump will run dry and burn out, air will get into system and speed up corrosion process for starters, if it is on a combined feed and expansion it is dangerous as the vent path will be removed if the valve is shut

 

[tripty]

Arhhhh, okay so not having a valve is purely to stop a forgetful person from running system with valve closed. Could be useful though when you want to do something to system rather than blocking the outlet with a bung?

Oh well, I was kinda wrong

Cheers kirkgas

 

[tamz]

Could be useful though when you want to do something to system rather than blocking the outlet with a bung?

Thats what the inlet valve is for

 

[kirkgas]

Arhhhh, okay so not having a valve is purely to stop a forgetful person from running system with valve closed. Could be useful though when you want to do something to system rather than blocking the outlet with a bung?

Oh well, I was kinda wrong

nah sorry you are completely wrong