Cartridge and Big One filters
23" and 40" polypropylene housings up to 6 bar, plus melt-blown, string-wound, pleated and stainless cartridges.
Big One housings are large-diameter cartridge housings for high-flow duty, used ahead of RO, in seawater plants and in industrial processes.
- 100% polypropylene body
- 23" and 40" body options
- 3" (DN 80) flanged inlet and outlet
- Maximum 6 bar working pressure
- Maximum 20 bar burst pressure
- Maximum 40 °C working temperature
- Double O-ring design to reduce bypass risk
Reference projects using this system
Ask us for reference projects relevant to this system and your water.
Further reading
Questions buyers ask
What is a Big One filter housing?
Big One housings are large-diameter cartridge housings for high-flow duty. They are used ahead of RO, in seawater plants and in industrial processes, where a standard small housing would need many units in parallel. They come in 23 inch and 40 inch body options with 3 inch (DN 80) flanged connections.
What are the operating limits of the housings?
The housings have a 100% polypropylene body, a maximum working pressure of 6 bar, a maximum burst pressure of 20 bar and a maximum working temperature of 40 °C. A double O-ring design reduces the risk of bypass around the cartridge.
Which cartridges are available?
Melt-blown, string-wound, pleated and stainless steel cartridges. The micron rating and type are chosen from the duty: sediment protection, final protection before RO membranes or process filtration. AFG supplies replacement cartridges as consumables, so the same housings can be kept in service for years with the cartridge type adjusted to the duty.
When should cartridges be changed?
Cartridges are changed when the pressure difference across the housing reaches the set limit, or at fixed intervals in critical service such as RO feed. A rising pressure difference that comes too quickly usually means the upstream filtration needs attention.