best drain down procedure

[adrianfs1]

hi guys, has anyone got any time saving tips for replacing a rad and valves on combi system

 

[moony]

nothing more than dropping the pressure and working on one pipe at a time. cant really do anymore than that

 

[adrianfs1]

dropping the pressure?????

 

[Blackcatgas]

easyer on a rad upstairs, blow off the pressure on the prv on the boiler, turn off the rad valves on both sides, drain the rad into a thick binliner/use a wet vac to suck it up under the union. undo the bottom nut Be brave snatch it, shoot dirty water up the curtain etc, putt your thumb over the open pipe until it makes a circular cut into the skin of your thumb and bleeds, take a few deep breaths, put on the new valve shooting more black gunk up the laura ashley wallpaper and making sure the biege carpet gets wet around the valve, tighten, refill the rad.
Btw gas leak detection fluid in a pressurised can makes excellent carpet stain remover, not the luminous pink/green stuff though.

 

[Puddle]

blow off the pressure on the prv on the boiler, QUOTE]

Not good to release pressure through prv as 70 % of time will not re seal,end up having to fit new head or complete valve
Alot of plumbers try to rush draining,to get on with job,but what do you save on an average system 10-15 mins,which is lost cleaning up afterwards,like carpet
If I have to drain a system,thats the first thing I do,tools on job and drain,then when draining,get rad,valves any fittings,unpack,tape up threads by that time draining nearly done,if not done

If not open prv,ect

 

[Blackcatgas]

Not good to release pressure through prv as 70 % of time will not re seal,end up having to fit new head or complete valve

Yeah fair play to you Puddle ,this happened last time I did this when I changed the pump on a 7yr old WB combi when I changed the pump, I spent over an hour trying to sort it at 7pm on a friday.
I will be more likely to try blowing off the prv as a "pro" as Ive got more of a chance of sorting it if it goes wrong.
The rest of my post was more light hearted.