What is a combination radiator wrench or key?

 
     
     
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    Parts of a combination wrench-key 
 Combination radiator wrench-key 

The parts of a combination wrench/key are:

 

  • Handle

  • Open-ended spanner

  • Hexagonal profile for fixing or removing valve tails

  • Square profile for fixing or removing bleed plugs and blanking plugs

  • A hole to give clearance to bleed screws when fitting/removing bleed plugs

 
     
  

This is another type of multi-purpose key for working on radiator valve tails, bleed plugs (but not bleed screws) and blanking plugs.

 

It fits the integral external nuts on some 1/2 inch radiator valve tails...

 
     
  

...the 1/2 inch square sections of some bleed plugs (as seen here) and some blanking plugs...

 
     
  

...and the internal hexagons of 1/2 inch valve tails.

 
     
 Combination radiator wrench-key 

This type of wrench is usually made of hardened steel for strentgh and durability.

 
     
 Using combination wrench-key 

For step-by-step guides to some of the things you can do with this key, see: How to fit and remove blanking plugs and bleed plugs and How to fit and remove valve tails

 
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