Filter cartridges for 10" and 20" BIG housings are available in the following three series:
Depth filtration: PO BB / polypropylene
Surface filtration: PL BB / polyester
Active carbon: Z-AKX BB / active carbon filter cartridges
Please select your WF 15 BIG housing by clicking on the desired product details in the first blue frame, starting with the size and continuing to the seal. Information about availability and price will be provided for you when you are logged on. Or send us an enquiry.