This blog is especially for John Halls who wanted me to illustrate how to fit a SP21S pump set on to 28mm pipe.

For customers with 35mm pipework simply buy 35mm to 22mm reducing couplers and not 28mm to 22mm

ShowerPowerBoosters are designed to fit onto 22mm and this is the easiest way of doing it:-

SP2B
2 number 28mm x 22mm Compression Reducing Coupler
2 Number short lengths of 22mm pipe (40 mm long)
Total Length 240mm

SP21S
2 number 28mm x 22mm Compression Reducing Coupler
3 Number short lengths of 22mm pipe (40 mm long)
Total Length 240mm + 150mm = 390mm