These latest model Onga cartridge filters are also a direct replacement for the Monarch P4 range.
Their compact design makes these cartridge filters easy to handle and store, and they are available in 3 different sizes to suit almost any pool or spa installation.
- Special top-loading filter housing for ease of cartridge removal for cleaning or replacement.
- Easy to read pressure gauge shows whether the filter requires cleaning.
- Reinforced polyester cartridge for longer filter cycles between cleaning