Help - removed radiator from combi system

[kevplumb]

ANTICLOCKWISE its upside down

 

[jeanette63]

its ok i did anticlockwise, i remembered, but its still leaking, please dont tell me i need to drain the system and fit a new valve, im not putting another radiator back in there, can i just use ptfe to seal and waterproof tape, even temporarily, if so can i put heating back on, ps thankyou to everyone for being so helpful - and patient!

 

[Joe4542]

See pic below - if the top part of the valve is loose - tighten the collar below it - if its loose it may not hold the valve closed properly - and may leak

If its the valve 'body' thats loose on the pipe - then you tighten the nut below it.

View media item 11238
Edit - oops too slow...

 

[kevplumb]

its ok i did anticlockwise, i remembered, but its still leaking, please dont tell me i need to drain the system and fit a new valve, im not putting another radiator back in there, can i just use ptfe to seal and waterproof tape, even temporarily, if so can i put heating back on, ps thankyou to everyone for being so helpful - and patient!

na won't work if your gonna drain put a couple of stop ends on

i'm sure we can talk you through it

once helped a gall install a shower via skype and a web cam just so she could pee her hubby off

and keep asking thats why we are here

 

[jeanette63]

[GALLERY=media, 11242][/GALLERY]

Im hoping someone recognises this and can explain why it wont tighten, using two spanners but it still wants to move as one piece?

 

[glasgowgas]

removed and replaced exact same valve last week.
looks like the pipe entering the valve has a slight kink (wont help making a seal) plus the bottom nut tends to get stretched ie when you take it off after x years being on it wont re seal

best bet to replace with a new lockshield valve they are not to dear £3-£5 from the big diy warehouse places

 

[kevplumb]

its (geordie) paggered

(yank) bust

drain off and fit a couple of these

View media item 11244or get one of these View media item 91

as long as its not here

View media item 649

 

[jeanette63]

thanks

do i def have to drain the system to change the valve?

 

[kevplumb]

you have several options

1 drain

2 freeze

3 try to hold a vacum on the system

personally i would go for 2

my advise to you is go for 1

 

[glasgowgas]

if you really know what you are doing ( and i do not mean any offence when i say that ) if you have the new valve ready to rock, cut the pipe, stick finger over cut pipe end, put on new valve and tighten. you will have a wee bit of a spill but not a mad flood.
best bet is to drain down, it gives you plenty of time to do repair.

 

[glasgowgas]

sorry jeanette unrelated post i know but.........

is that kevplumb or ac/dc`s brian johnstone!!!!! cool!

 

[dextrous]

That pipe looks like 8mm or 10mm microbore, so make sure you get a stop-end for this size of pipe. When you've drained it down, use a hacksaw to cut the pipe an inch or so below the valve, clean the pipe with a bit of wire wool or even a kitchen scourer (the green side) before putting the fitting on.

If you're not sure of what size pipe it is, cut the pipe as suggested and take the valve with the pipe offcut still attached to a plumber's merchants (they close midday on saturday) and they'll see you right.

 

[jeanette63]

I dont know anything about plumbing, while not wanting to rush this, i have lots more to do! Plus im not sure on draining the system, so i could cut the pipe, and screw on the new valve really quickly without flooding?
ps is a lockshield valve and a stop end the same thing.

 

[glasgowgas]

no.
a lockshield valve is what is on your pipe right now.

a stopend is the first picture in kevplumbs post.

it should be pretty easy to drain your system down. there will/should be a small drain off cock outside your hoose down at a really low level. open it up and your central heating system will empty. to re fill close drain off cock and open your filling loop and vent your rads

 

[dextrous]

A stopend is a cap that you use if you have no intention of using the pipe again, whereas a lockshield is a valve that you'd use if you were going to reuse the pipe to connect to a radiator. Don't know why you removed the radiator in the first place (decorating or just to get rid of it), so this will determine which fitting you will need to get.

Since we cannot determine what size pipe it is, you will most likely have to take the cut-off piece along to compare in the plumbers merchant, so draining will be your only option.