<p>The invention provides a strainer (10) assembly comprising a trap (2) arranged between an inlet (3) and outlet (4). A strainer (1 ) divides the trap (2) and provides a deflector (11) which is located adjacent the trap between the inlet and outlet and is inclined towards the inlet. The strainer is a perforated plate. The inlet and outlet are formed from a first pipe (5) and the trap from a second pipe (6) of greater diameter than the first pipe. The trap (2) has a removable end plate (15) and is fitted with guides to slidabiy receive side edges of the strainer. The deflector portion of the strainer sized fits past the guides (20) and has a curved edge abut the wail inside the first pipe. The end plate (15) is fitted with a valve controlled discharge port on the inlet side of the strainer. The inlet and outlet are provided with a flange for connection into a water pipe. The strainer assembly is suited for use on a centre pivot irrigation system between the last tower and the overhang.</p>
