Radiator Spud Wrench 1/2in Drive Valve Tail Step Wrench

A radiator spud wrench with 1/2in drive, used for fitting and removing internal radiator fittings such as valve tails, lugs, nipples and tank connectors. The stepped hex design gives you multiple size options in one tool, making it a practical choice for heating and plumbing work.

Used when working on radiators during heating repairs, system servicing and replacement jobs, this wrench helps reach fittings that are awkward to grip with standard spanners. Handy for plumbers, heating engineers and capable DIY users, it suits jobs such as changing radiator valves, removing old tails and dealing with threaded internal fittings during installation or maintenance.

The wrench is made to fit a 1/2in drive, so it can be used with compatible ratchets, bars or other drive tools already in your kit. Its stepped format covers metric hex sizes 10, 11, 12.5, 16 and 21mm, along with imperial sizes 3/8, 7/16 and 1/2in, which helps cover common radiator and tank fitting sizes without switching between separate tools. That makes it useful for regular maintenance work, especially when access is limited and you need a straightforward way to turn internal fittings cleanly and securely.

Radiator spud wrench specifications

• Drive: 1/2in drive fit for use with compatible ratchets and drive tools.
• Covers: Suitable for radiator valve tails, lugs, nipples and tank connectors.
• Metric sizes: 10, 11, 12.5, 16 and 21mm stepped hex sizes.
• Imperial sizes: 3/8in, 7/16in and 1/2in options included in the step profile.
• Function: Made for fitting and removing internal threaded fittings in heating and plumbing work.

A practical choice for regular heating repair and radiator maintenance jobs.