Keep Coast Spas water pristine with a purpose-built replacement filter cartridge designed specifically for Coast Spas (Canada) Waterway bottom systems. The Darlly 51002 cartridge delivers a precise fit and reliable filtration for everyday spa sessions—easy to install and built to last.
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Brand/Model: Darlly 51002 (also listed as C-5396 and FC-2975) replacement cartridge for Coast Spas Canada Waterway bottom systems
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Fitment: Precise plug‑and‑play replacement that matches Coast Spas Canada Waterway configurations for dependable performance
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Top/Bottom Style: Open top and open bottom provide straightforward seating in housings and reduced bypass
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Dimensions: Top diameter 2-1/8", Bottom diameter 5-5/16", Length 21-5/16"
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Filtration Media: 3 oz filter media with a 100 sq ft filtration surface for thorough dirt and oil capture
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What it replaces: Compatible with Coast Spas Canada Waterway bottom systems (model references include 51002/C-5396/FC-2975)
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Maintenance tip: Rinse before first use to remove manufacturing dust; replace when flow or water clarity declines
With the Darlly 51002 cartridge, you gain consistent water clarity and dependable pump performance. The generous 100 sq ft filtration surface efficiently traps dirt and oils, helping maintain crystal-clear water and steady flow. The open-top/open-bottom design supports easy installation and secure seating in your Coast Spas Waterway housing, reducing bypass and downtime during replacements. A true plug‑and‑play replacement, it’s a practical choice for spa owners who want reliable filtration without guesswork.
| Application |
Coast Spas (Canada), Waterway |
| Bottom Physical Dimension |
2-1/8" |
| Bottom Style |
Open |
| Diameter |
5-5/16" |
| Length |
21-5/16" |
| Media Type |
3oz |
| Square Footage |
100 sq ft |
| Top Physical Dimension |
2-1/8" |
| Top Style |
Open |
