Hayward Smart Filter. Is this 450 or 550?

[Ibalee]

Here's a picture of the filter. On the outside, it says 450 or 500. When I look online there seem to be size difference betwee. The two cartridges. On the bottom right corner of the picture, it says "model=C5520BHMB". Can I assume that it's 550 size?

 

[zea3]

Bumping post to add it to today's activity stream. Hopefully someone will have suggestions for you.

 

[JasonLion]

Yes that is a 550. The 450 would have a model number that started with C45.