Alpine Spa Filter C18 (143x160mm) | 2-Pack | Fits Multiple Brands | NZ Stock
Premium Alpine C18 Spa Pool Filter Cartridge – 2-Pack
Crystal-clear spa water starts with superior filtration. The Alpine C18 filter cartridge delivers professional-grade performance, capturing dirt, oils, body lotions, and microscopic debris that cloud your spa experience. Trusted by spa owners across New Zealand.
✅ Popular Replacement Filter for Alpine & Compatible Spas – This C18 filter fits multiple spa models across NZ. If you have a spa with a 143mm x 160mm filter with semi-circle handle and 46mm SAE thread, this is your filter. 2-Pack value bundle – perfect for rotating filters during cleaning!
✓ Why Choose the Alpine C18 Filter (2-Pack)?
- Maximum Filtration Efficiency – Advanced pleated design traps fine particles, oils, and debris for crystal-clear water
- Extended Filter Life – Durable construction means fewer replacements and lower long-term costs (12-18 month lifespan per filter)
- 2-Pack Convenience – Rotate filters every 2-4 weeks while cleaning the other – your spa never stops running
- Perfect Fit for Alpine Systems – Engineered for Alpine Spas and compatible brands with precise dimensions
- Easy Maintenance – Semi-circle handle makes removal and installation effortless in under 5 minutes
- Healthier Spa Water – Reduces chemical demand through efficient contaminant removal
- NZ Stock – Fast nationwide shipping, dispatched same day for orders before 9am
- FREE SHIPPING ELIGIBLE – This product qualifies for free shipping on orders over $150 (excludes oversized items)
- In-Store Pickup Available – Collect from our Auckland location (9am-4pm weekdays, 10am-2pm Saturdays)
📐 Technical Specifications
- Model: Alpine C18
- Diameter: 143mm (5.6 inches)
- Length: 160mm (6.3 inches)
- Top Fitting: Semi-circle handle for easy removal
- Bottom Thread: 46mm SAE thread
- Filter Type: Pleated cartridge
- Filtration Rating: High-efficiency pleated media
- Colour: White with colored end caps
- Quantity: 2 filters per pack
🔧 Compatible Spa Brands & Models
This Alpine C18 filter is compatible with the following brands and models:
Direct Replacements For:
- Alpine Spas: C18 model filters
- Spa systems using 143mm x 160mm filters with semi-circle handle and 46mm SAE thread
Compatible Spa Brands:
- Alpine Spas: Leisurerite, Relaxer, Escape, and other Alpine models with C18 filtration
- Signature Spas: Select models with 143mm x 160mm filter requirements
- Trueform Spas: Models using C18 specification filters
- Generic Spa Systems: Any spa using 143mm diameter, 160mm length, semi-circle handle, 46mm SAE thread filters
Not sure if this fits your spa? Check your current filter dimensions or contact our team with your spa brand and model – we'll confirm compatibility within hours.
🛠️ Installation & Maintenance Guide
Installation (5 minutes):
- Turn off spa pump and power
- Remove filter housing lid or access panel
- Lift out old filter using the semi-circle handle
- Insert new C18 filter, ensuring proper seating on bottom thread (46mm SAE)
- Replace housing lid and restore power
Maintenance Schedule (2-Filter Rotation System):
- Every 2-4 weeks: Swap filters – remove Filter 1, rinse with garden hose, let dry. Install Filter 2 from your 2-pack
- Monthly: Deep clean with filter cleaner soak solution (soak overnight for best results)
- Every 12-18 months: Replace both filter cartridges for optimal performance
Pro Tip: With this 2-pack, you can rotate filters every 2-4 weeks – your spa stays running while the other filter dries and gets deep cleaned. Use our 1L Filter Cleaner Soak monthly to remove oils, lotions, and mineral buildup that regular rinsing can't touch.
❓ Frequently Asked Questions
Q: How often should I replace my spa filters?
A: Every 12-18 months depending on usage. With this 2-pack and proper rotation, you'll get maximum lifespan from both filters. Heavy use (daily) may require replacement at 12 months, while occasional use can extend to 18 months. Signs you need new filters: reduced water flow, cloudy water despite balancing, or visible wear/tears.
Q: Why buy a 2-pack instead of a single filter?
A: The 2-pack lets you rotate filters every 2-4 weeks – one stays in the spa while you clean and dry the other. This rotation system extends filter life, maintains consistent water quality, and means your spa never has to sit idle during filter cleaning. Plus, better value per filter!
Q: Can I clean and reuse these filters?
A: Yes! Regular cleaning extends filter life. Rinse every 2-4 weeks and deep-clean monthly with our Filter Cleaner Soak. However, filters eventually lose effectiveness and must be replaced every 12-18 months.
Q: Will this fit my spa if the dimensions match?
A: Most likely yes. Verify the dimensions: 143mm diameter, 160mm length, semi-circle handle on top, and 46mm SAE thread on bottom. If unsure, send us a photo of your current filter or visit our store to compare.
Q: What's the difference between these and cheaper filters?
A: Premium filtration media, longer lifespan, better chemical resistance, and proper fit guarantee. Cheap filters clog faster, need frequent replacement, and may not seal properly – costing more long-term and risking poor water quality.
Q: How do I know when to clean vs replace?
A: Clean when water flow decreases or every 2-4 weeks. Replace when: filter media looks compressed/matted, pleats won't come clean, filter is over 18 months old, or you notice tears/damage.
Q: Can I pick this up in-store?
A: Absolutely! We're located at 15C Douglas Alexander Parade, Rosedale, Auckland 0632. In stock and ready for immediate pickup during business hours (9am-4pm weekdays, 10am-2pm Saturdays).
Q: What if this doesn't fit my spa?
A: We offer easy returns within 30 days on unused filters that remain sealed in original packaging. Just contact us and we'll help you find the right filter or process a refund. Note: Once the seal is broken, filters cannot be returned for hygiene reasons.
Q: Do you offer free shipping?
A: Yes! This product is eligible for FREE shipping on orders over $150 (free shipping excludes oversized items only). Add a Filter Cleaner Soak, test strips, or chlorine to reach the threshold and save on delivery.
💧 The Perfect Pools Difference
- ✓ NZ Owned & Operated – Supporting Kiwi spa owners since day one
- ✓ Expert Support – Our team knows spa filtration inside-out
- ✓ Fast Shipping – Orders before 9am dispatched same day
- ✓ In-Store Pickup – Collect from our Auckland location (9am-4pm weekdays, 10am-2pm Saturdays)
- ✓ Quality Guaranteed – Premium filters that perform
- ✓ Competitive Pricing – Great value without compromising quality
- ✓ In Stock – Ready to ship or collect
- ✓ FREE Shipping Eligible – On orders over $150
📞 Need Help? We're Here For You
Not sure if this filter fits your spa? Our filtration experts are ready to help:
- Phone: 022 286 2881
- Email: info@perfectpools.co.nz
- Contact Page: Visit our Contact Page
- Live Chat: Click the chat icon (bottom right) for instant help
- Response Time: Usually within 2-4 hours on business days
What to include when contacting us: Your spa brand/model, current filter dimensions, or a photo of your existing filter. We'll confirm compatibility fast.
🏬 Visit Our Store
Perfect Pools NZ
15C Douglas Alexander Parade
Rosedale, Auckland 0632
New Zealand
📍 Get Directions on Google Maps
Business Hours:
Weekdays: 9am - 4pm
Saturdays: 10am - 2pm
Sundays: Closed
In-Store Collection: This 2-pack filter set is in stock and ready for immediate pickup during business hours. No need to call ahead!
🚚 Shipping & Returns
- Order Cutoff: Orders placed before 9am ship same day (business days)
- Delivery Times: 1-3 business days nationwide (most North Island locations 1-2 days, South Island 2-3 days)
- FREE Shipping: This product qualifies for free shipping on orders over $150 (excludes oversized items)
- In-Store Pickup: Available at 15C Douglas Alexander Parade, Rosedale, Auckland 0632 (9am-4pm weekdays, 10am-2pm Saturdays)
- Tracking: Provided automatically via email
- Returns: 30-day return policy on unused, sealed filters in original packaging
🎯 Complete Your Spa Maintenance Kit
Keep your spa in peak condition with these essential products:
- 1L Filter Cleaner Soak – Deep-clean your filters monthly to remove oils, lotions & mineral buildup
- 5-in-1 Pool & Spa Test Strips (25 Pack) – Monitor pH, chlorine, alkalinity, hardness & more in seconds
- Crystalline Chlorine 4kg Pail – Premium sodium di-chlor sanitizer for crystal-clear water
- Spa Pool Starter Kit – Complete water care system with chlorine treatment
⚡ In stock and ready to ship or collect. Order now for cleaner, clearer spa water delivered to your door or pick up from our Auckland store. Your spa deserves the best – and so do you.
Questions? Call 022 286 2881 or use live chat – we're here to help! 🇳🇿
