Length:Length is measured from the outside edge of end cap to end cap, not including any handles, threads or slip fittings. 9-1/4"
Top:This is the actual inside hole diameter, excluding any taper.2-1/8" Open
Bottom:This is the actual inside hole diameter, excluding any taper.2-1/8" Open
Premium replacement for:Unicel:Unicel part numbers either start with a "C" or contain a "CH" like "C-8475RA" or "6CH-49".C-4335
Pleatco:Pleatco part numbers start with a "P" like "PWW100ST".PRB35-IN
Filbur:Filbur part numbers start with an "FC-" like "FC-0360".FC-2385
Other:817-3501, FL1008, 13501, 74148
Spa filters and other products from Spa Depot are the best.
Using the same things for years, why change now.
It was easy to order, insert and inexpensive! I will buy again!
Just what we needed!
Great product at a great price. Fast shipping, will return to purchase more in the future.
Work great fit exactly like they're supposed to
The filter fit fine like the original.
no back orders
The filter definitely fits. I have a Wellis spa Leo model and it certainly was the right size. However, the filter kept wanting to float up. Perhaps because it took a while for the water to be absorbed. I'm not sure. This was the only issue. The original was a super fine antimicrobial filter however, it also was about $60 at my local spa store for only a qty of 1. All in all, I'd say this was an awesome buy for the price, quantity, and quality. It gets the job done.