Tumby Bay Police are investigating the theft of a custom-built water pump trailer from Lipson earlier this month.
Sometime between 6pm on Saturday, September 12 and 9am on Sunday, September 13, the trailer with a 2200-litre water tank, motor and pump was stolen.
The trailer had been parked about 200 metres south of Lincoln Highway and could be seen from the road.
Anybody who knows the whereabouts of the trailer is asked to contact police on 131 444.
If you have any information that may assist the investigation please contact Crime Stoppers on 1800 333 000 or report online at crimestopperssa.com.au. You can remain anonymous.