Making a radiator tail for a drainoff

[gnvqsos]

I need to drain down CH system but there is drain valve at lowest point.I would like to make a radiator tail using a short length of copper with sevice valve in-line and solder the copper to female part of rad valve.
1. will this work ?
2.is there a better method of achieving a drain-down point?

Thanks

I ought to emphasise that this will be a temporary measure and I will use a more permanent solution later eg a radiator valve with integrated drain-off valve

 

[John506]

Where the copper goes up into the rad, instead of using a 90 degree bend or an elbow, use a tee, with a short length of copper on the open end of the tee, with a drain off valve soldered on?

 

[John506]

Or get one of these

 

[PlumbGas]

Or get one of these

Correct John, why mess about with bits of copper and T's, just buy a lockshield with built in drain off, some people like to make life hard for themselves

 

[xr4x4]

Or get one of these

Correct John, why mess about with bits of copper and T's, just buy a lockshield with built in drain off, some people like to make life hard for themselves

I've heard these are unreliable and Shiite!

 

[seco services]

They are handy as you can just drain the rad as a draincock on the pipework drains the lot.

 

[PlumbGas]

Or get one of these

Correct John, why mess about with bits of copper and T's, just buy a lockshield with built in drain off, some people like to make life hard for themselves

I've heard these are unreliable and s****!

Not if you buy a good make, http://www.onplumb.com/pegler-mercia-15mm-rad-valve-lockshield-drain-off-chrome-647058.html

 

[expertgasman]

Or get one of these

Correct John, why mess about with bits of copper and T's, just buy a lockshield with built in drain off, some people like to make life hard for themselves

I've heard these are unreliable and s****!

EVERY drain cockis unreliable and carp. But ugly home made stuff will be no better.

seco services Posted: Sat Jun 18, 2011 4:56 pm Post Subject:

They are handy as you can just drain the rad as a draincock on the pipework drains the lot.
I think you misunderstand, my friend. These draincocks are BEFORE the valve so drain the system, not just the rad.

You are thinking of these, 2nd image down:
http://www.plumbingsupplyservices.co.uk/acatalog/std_valves.html

 

[seco services]

I think you misunderstand, my friend. These draincocks are BEFORE the valve so drain the system, not just the rad.

no it will shut off the pipe feed but still drain from the rad.