draining down a wb 28cdi

[angelf]

I note from a lot of posts on this site that its best not to use the iso valves under this boiler to drain down the c/ h and hot water because they leak.
I need to do this 2morrow (to change a water to water hex) so what is the leak free alternative please?

 

[holty]

sadly the iso valves can even leak if not touched when draining down.in the end its up to you if your feeling lucky.least it aint last thing on a friday job.

 

[twgas]

Just leave isos open and drain in usual way, may take slightly longer - but safer.

 

[nickso]

try the plastic drain offs on either side of the boiler. they work 50% of the time.