Push in coupling  to reduce 25mm o/d pipe to 20mm o/d pipe.

VERY IMPORTANT...ALL OF OUR PVC PIPE AND FITTINGS ARE FOR PIPE THAT HAS THE ACTUAL OUTSIDE DIAMETER OF THE FITTING'S HOLE. FOR EXAMPLE, A 20MM ELBOW HAS A 20MM HOLE TO SUIT 20MM O/D PIPE.
PLEASE CHOOSE CAREFULLY AS THESE FITTINGS ARE NOT COMPATIBLE WITH AUSTRALIAN STANDARD ONES, WE STOCK THEM AS THEY FIT THE PIPE THAT COMES WITH SKIMMERS, OVERFLOWS AND PUMPS MADE IN THE USA AND CHINA.