to drain or not to drain?

[jase158]

Was watching watchdog couple months ago and they had a go at one of the plumbers because he drained down when not needed, amongst other things.

Now got me thinking how many of you drain the whole heating system and how many just drain individual radiators. Now I am not interested in freezing kits, i.e.

The example is radiator valve is broke and needs replacing, on the top floor, do you drain whole system or just drain down the radiator and open valves until pipes run dry?

 

[Resolute]

I'd drain the whole system. Then refill adding new inhibitor.

 

[marleyco]

Which ever is easiest. Drain down on a open system often leaves you with air problems, a small job can turn into a nightmare

 

[jase158]

exactly, my thoughts, always drain down. but am interested in other opinions, of course we are suppose to be environmentally friendly but in my opinion this is house friendly, rather waste a little water then have a massive puddle all over the floor.

 

[Gray0689]

Plug the vent and cold feed ( bottle it up) much easier and faster

 

[stevetheplumber]

depends on the system combi its no prob but open vent can be a pain however for a top floor rad id just drain enough to empty the rad
its easy being the "expert" on these shows but a plumber whod just buggered a cream carpet on the last job would be playing safe and draining downat least untill the memory faded

 

[SimonJohns]

I tend to avoid draining in any situation. Because I just can't be bothered with airlocks later on.

But in certain cases you have too. All depends

 

[SimonG]

Avoid draining if I can get away with it, if I have to I tend to drain fully, had a good run just recently done em all live. Got two connections to make this week for 2 towel rails and a moved radiator. Top floor of nursing home and can't drain down so it's down to the slice, me thumb and a couple of towels.

 

[tamz]

It is easy for the telly "so called experts" to say what should and should not be done. If they were that much expert they wouldn't be prostituting themselves to the BBC for their 5 minutes of fame. It is not their liability insurance or good reputation taking the dunt if it all went mammaries up.
Do what you feel comfortable doing.
Personally i would do it live :lol:

 

[Best]

Draining down for one valve replacement? Def not! Even if nut & olive or / and rad tail need changed also, it's still easy job for a pro & saves waste of inhibitor. Sealed system, - take pressure off & pipe dead. Open vented, - plug vent+ feed & drop pressure & pipe dead. Changing tail? Easy. Plenty towels obviously. Live pipe at top floor on o/v won't have much press , but worth doing plug method. Not diy admit. Safer, a two man job. Worse case I guess would be working live, cutting olive off, taking nut off & then pipe dropping below floor! :6:

 

[TheToiletDoctor]

I find freezing saves having to drain down and risk problems if gravity fed. I have had occassions where there is so much rubbish in system that draining down caused blockage that needed powerflush to remove.

 

[stevetheplumber]

spare cutters clipped onto pipe low down will stop pipe dropping through floor scenario

 

[SimonG]

spare cutters clipped onto pipe low down will stop pipe dropping through floor scenario

I like that one, tend to use mole grips and a bit of cloth or cardboard so as not to mark pipe.

 

[Best]

I use adjustable pipe cutters at floor sometimes as only thing at hand when a pipe needs soldered. I can tighten cutters gently against pipe. I don't normally use it on rad pipes as I don't let them out of my hand if they can drop! I changed a 22mm ballfix service valve this week that some idiot had fitted years ago to a heating pipe in a hall rad in a large victorian house. Why anyone uses them? It was leaking at seal due to heat. Did it live ( by myself) using towels & stemmed water with towel incase I cut myself. Pressure was a lot! Wooden varnished floor. Job took couple mins. Not for faint hearted though.

 

[Hybrid]

I use a new talon clip