fitting a microgenus drain valve

[mrfiddler]

Where on my micro genus 27 mffi should the drain valve be fitted ?In the past I have released intto a bucket but this gets messy! I now have to fit a PSV ,so I thought this would be a good time to fit a drain valve.

 

[Agile]

A drain cock is fitted onto the system and usually on a pipe to a rad.

It sounds as if your PRV vent pipe is missing! Thats dangerous!

Tony

 

[Rob]

You mean PRV?

System drain valve should be at lowest point of system to drain the lot but the microgenus has probably the best drain valve of any boiler!

 

[ChrisR]

But have you got a Public Service Vehicle license??

 

[mrfiddler]

I should have said I am replacing a leaking PRV valve .The boiler is sited in the porch and all pipework goes up,therefore when I drain down using radiator draincocks the boiler is still full,so if I were to fit adrain cock to the CH return would this work?

 

[Rob]

Yes but if you look at the return isolating valve (furthest right) the it has a 'cap'. If you turn the valve off, remove cap, stick a bucket underneath and re-open the valve the boiler will drain in seconds.

A drain valve would be a good idea though.

 

[mrfiddler]

thanks Rob,Ive now had alook at that and it looks like it was made for the job,so Ill give it a try.

 

[Gasguru]

Bleed all the radiators of air, close the auto air vent cap, open the PRV (and leave open), check the expansion vessel air pressure (see FAQs), when the water stops flowing replace the PRV....should be no need to drain the system or isolate the boiler.