If you already know a replacement number for your spa filter cartridge, please: Enter the replacement hot tub filter number here:
You can sometimes find the part number stamped onto the filter end cap.
If you know your hot tub manufacturer, please select it below.
Choose the shape of your filter end caps, then enter the dimensions and click Find By Dimensions below.
Dimensions can have a tolerance of ± 1/4". Measurements on old filters may not exactly match new filters due to expansion or contraction or wear on the old filter. If you have any questions don't hesitate to contact us at 1.888.251.6661 and one of our knowledgeable team members can help you.
Measure Diameter at the widest point of the end cap from the outside of each edge.
Measure Diameter at the widest point inside the hole.
Measure Filter Length from outside edge of each end cap.
DISCLAIMER: Hot Tub Things is not responsible for errors in measurements. Please make sure to double-check your dimensions before proceeding.