Allows you to retrofit a bottom drain into your pond and change the system from pump fed to a true gravity fed filter system if filter is lowed to height of pond.
Comes complete with everything that is required to install
3” internal smooth wall pipe (3m standard additional can be purchased)
3” Slide valve
10ft pipe = 2.5cm head drop @ 2200 UK gallons per hour / 10000 litres per hour
15ft pipe = 2.5cm head drop @ 1900 UK gallons per hour / 8600 litres per hour