Darlly Spa And Pool Replacement Filter Cartridge 51002 C5396 FC2975 For 100 Sq Ft Waterway Coast Spas Canada

Keep your Coast Spas water pristine with the Darlly Spa/Pool Replacement Filter Cartridge 51002 — also listed as C-5396 and FC-2975. Designed specifically for Coast Spas (Canada) Waterway applications, this cartridge delivers a precise fit and robust filtration you can trust for everyday spa sessions.

Key Specifications

• Brand/Model: Darlly 51002 (C-5396, FC-2975) replacement cartridge
• Fits: Coast Spas (Canada) Waterway bottom systems
• Top Style: Open; Top Diameter: 2-1/8"
• Bottom Style: Open; Bottom Diameter: 5-5/16"
• Length: 21-5/16"
• Media Type: 3 oz filter media
• Filtration Surface: 100 sq ft

Why this replacement matters

Filtration is the heartbeat of a spa experience. This cartridge maximizes dirt and oil capture across a generous 100 sq ft surface, helping maintain crystal-clear water and steady, efficient flow. The open-top and open-bottom design guarantees a straightforward, secure seating in Coast Spas Waterway housings, reducing bypass and making restocking a breeze. With its exact dimensions, you’re getting a plug‑and‑play replacement that aligns with Coast Spas Canada configurations for reliable performance every soak.

Ideal use cases

• Owners of Coast Spas (Canada) using Waterway systems who want a trustworthy, ready-for-service filter cartridge.
• Frequent spa users and households with regular spa sessions seeking consistent water quality and clear filtration.
• Spas that require a precise-fit replacement cartridge to maintain optimal pump efficiency and flow.

Fit, installation & maintenance tips

• Ensure your housing accepts a 2-1/8" top diameter and a 5-5/16" bottom diameter cartridge with a 21-5/16" length for a proper seal.
• Before first use, rinse the new cartridge under running water to remove manufacturing dust and debris.
• During regular maintenance, inspect water clarity and flow; replace the cartridge when you notice reduced flow or water quality declines.
• Store unused cartridges in a cool, dry place to preserve filter media integrity.

What you gain

With the Darlly 51002 cartridge, you’re investing in a dedicated replacement that respects Coast Spas Waterway configurations and delivers dependable filtration. Expect clearer water, more consistent pump performance, and a straightforward replacement process that keeps your spa ready for enjoyment without guesswork.