ZOTEE Spa & Pool Filter Cartridge Replacement — 50 Sq.Ft, 13.5" x 4 15/16", 2-Pack high-flow pleated filters

ZOTEE replacement spa and pool filter cartridges provide 50 sq.ft. of pleated filtration power in a 13.5" cartridge that fits Filbur FC-0172, Waterway 817-4050, Unicel 4CH-949 and similar models.

Keep your hot tub or spa water clearer and your circulation system running smoothly with these two high-flow replacement cartridges. Each cartridge is 13 1/2" long with a 4 15/16" outside diameter, a V-groove semi-circular top handle for easy lifting, and a 2" female SAE threaded bottom for secure seating. The pleated fabric construction increases surface area for trapping debris while the reinforced core delivers steady flow and reduced wear on pumps.

How does this filter fit my spa or hot tub?

These ZOTEE cartridges are designed as direct replacements for common OEM part numbers so you can swap them in without modifying your filter housing. Confirm compatibility by measuring nominal length and diameter and matching the top- and bottom-end styles to your current cartridge.

• Compatible with Filbur FC-0172, Waterway 817-4050, Unicel 4CH-949 and Teleweir PWW50L
• Length 13 1/2" and outside diameter 4 15/16"
• V-groove semi-circular top handle and 2" female SAE bottom thread
• Sold as a convenient 2-pack for staggered replacements

What filtration performance can I expect?

The pleated media provides a large surface area—50 square feet—so it captures more particles between cleanings and maintains flow. A reinforced, high-flow core supports consistent water circulation and places less strain on the pump compared with flat or low-quality cartridges.

• 50 sq.ft. pleated filtration area for longer service life
• Durable, washable pleats resist collapsing when loaded with debris
• High-flow core helps keep pump workload lower and efficiency higher
• Suitable for routine spa maintenance cycles and vacation-ready water

How do I clean and maintain these cartridges?

Cleaning is simple: rinse the pleats with a garden hose and allow to dry before reinstalling or storing. For heavier buildup, soak in a filter-cleaning solution according to manufacturer directions; avoid high-pressure washers that can damage the media.

• Rinse every 1–2 weeks to prevent clogging and preserve flow
• Use an approved filter cleaner for deep cleaning when soiled
• Inspect for tears, crushed pleats, or damaged end caps—replace if found
• Rotate cartridges and replace annually or as water quality dictates

Why choose ZOTEE replacements over OEM parts?

ZOTEE cartridges are engineered to meet or exceed common OEM fit and flow specifications at a better value. The combination of washable pleated media, a sturdy core, and user-friendly end fittings makes them a pragmatic choice for ongoing spa care without sacrificing performance.

• Cost-effective 2-pack for easy on-hand replacements
• Robust pleated media for improved contaminant capture
• High-flow core to reduce pump stress and maintain circulation
• Simple swap-in design matches popular OEM dimensions and fittings

Who is this for: This ZOTEE 50 sq.ft. replacement cartridge 2-pack is ideal for hot tub and spa owners who need a compatible, durable, and washable filter option that matches Filbur FC-0172, Waterway 817-4050, Unicel 4CH-949, Teleweir 50 and similar models. It suits homeowners and property managers looking for straightforward maintenance, cost savings over OEM replacements, and reliable filtration that supports healthy circulation and clearer water.