radiator valve change kit

[cardiy]

http://www.toolstation.com/shop/Hand+Tools/Plumbers+Tools/Radiator+Valve+Change+Kit/d10/sd210/p31768 can anyone explain how to use these.

 

[seco services]

for use on an open vented system.
stick one in the vent one in the feed and it will create a vacuum in the system.

then use can work on the system without draining.
you'll only loose about a pint of water till the vacuum is created.

 

[cardiy]

No good on a combi then.

 

[seco services]

no not bungs.

 

[petit_pablo]

could be fun that!

On a combi, once the pressure has been released the system will usually vacuum enough to replace a rad valve. same theory as bung kits, if no air gets in, no water gets out.

 

[namsag]

on a combi if you cant use the appliance isolating valves to turn boiler off you need to close any auto air vent before it will vacum up

 

[cardiy]

So on a combi ,you need just to make sure all the bleed valves are off,or are you talking about another auto air vent and where would it be,then you can change the rad valves? thanks.

 

[cardiy]

could be fun that!

On a combi, once the pressure has been released the system will usually vacuum enough to replace a rad valve. same theory as bung kits, if no air gets in, no water gets out.

DO you just have to bleed all the rads first.

 

[kevplumb]

the auto air vent is on the boiler

leave the rad bleed valves closed

have a tray handy as you will lose a little till it settles

DONT open more than 1 pipe at a time View media item 11231 auto air vent (might be different colour )