Cartridge, 100sqft, ht, 3-5/8″ob, 8″dia, 16-1/2″L, 3oz | 81004

💧 Darlly Filtration 81004 Replacement Filter Cartridge — 100 sq ft

This is a 100 sq ft replacement filter cartridge from Darlly Filtration, part number 81004. It measures 8″ in diameter and 16-1/2″ long, with a handle top and a 3-5/8″ open bottom. It uses 3 oz filter media. If your old part carries one of the cross-reference numbers further down, this is listed as its alternative.

📏 Specifications

🛁 Spa makes it is listed for

Caldera Spas (Watkins), Watkins Mfg/Caldera Spa.

🔄 Cross-reference part numbers

These part numbers are listed as alternatives for this part.

📐 How to check the size

Measure your old cartridge from end to end for the length, and across the pleats at the widest point for the diameter. Then check the hole in the center of each end cap: an open end has a hole straight through, a closed end is solid. All of these should match the specifications table above.