Small leak from Potterton boiler

[duotwr]

I’ve got a small leak from my boiler - dripping off the bottom of this valve - which is on the central heating flow pipe.

Anyone know what kind of valve this is and what fixing it might involve?

Thanks
Keith

 

[CBW]

Looks like it’s been leaking from the top, a new fibre washer should sort it, and it’s the flow isolation valve.

 

[gas112]

as per above new washer should sort it .
no need for valve by looks of it
those valves are about 45 quid

 

[duotwr]

Thanks both. How hard to replace? Power down boiler, shut off cold water supply, drain, replace and recharge? Anything else?

 

[CBW]

Shouldn't be that hard, you could isolythe flow and return and drain, no need to isolate cold, change washer and repressurise the boiler. Not sure how good those will be at shutting off though @gas112 will know better than me, if not leave them alone and just drain the boiler change washer and repressurise