A 70-year-old man is recovering in the John Hunter Hospital after a freak accident on a property north of Maitland.

The Hunter’s Westpac Rescue Helicopter was called to Mindaribba on Saturday afternoon where they found the man with back and chest injuries.

It’s understood a 1000 litre water tank shifted on a trailer, pinning the man between a tank and a post.

He was treated at the scene by the Helicopter Critical Care team before being taken to hospital by road ambulance in serious but stable condition.

The Westpac Rescue Helicopter was called to a property at Mindaribba