Spa Pool Filter Cartridge | 225 x 135mm | Freeflow 46
A clean filter is the single most important factor in spa pool water quality. The Freeflow 46 filter cartridge in 225 x 135mm is one of the most widely used spa filter sizes in New Zealand, fitting a broad range of spa brands and models straight out of the box. Pleated polyester construction, easy to rinse, and built to last a full season of regular use.
Keep one spare on hand. Swap it in while the other dries. Your water stays cleaner, your pump works less, and your spa lasts longer.
Product Specifications
Compatible Spa Brands and Models
The 225 x 135mm Freeflow 46 cartridge is a widely used format across the NZ spa market. Common compatible brands include:
- Freeflow Spas
- Vortex Spas (select models)
- Sapphire Spas (select models)
- Spa World branded spas
- Various imported spa brands using the 225 x 135mm / FF46 format
Why Filter Maintenance Matters
- Water Clarity. A clean, functioning filter removes oils, debris, and fine particles that cloud spa water and stress your sanitiser.
- Pump Protection. A clogged filter forces your pump to work harder, increasing wear and energy consumption. Regular replacement protects your equipment.
- Chemical Efficiency. Clean filtration means your chlorine or bromine works on sanitising, not fighting suspended debris. You use less chemical and get better results.
- Pleated Polyester Construction. Greater surface area than wound or foam alternatives, with easy rinsing and good resistance to oils and body care products.
- Keep a Spare. Rotating between two cartridges, one in use and one drying after a rinse, extends the life of both and keeps your filtration consistent.
How to Clean and Maintain Your Spa Filter
- Weekly rinse. Remove the cartridge and rinse thoroughly with a garden hose, working from top to bottom between the pleats. Do not use a high-pressure washer as this can damage the media.
- Monthly soak. Soak overnight in a filter cleaning solution to remove oils and mineral buildup that rinsing alone won't clear.
- Replace annually. Even with good maintenance, pleated cartridges degrade over time. Replace every 12 months or sooner if the media shows visible damage, persistent discolouration, or reduced flow.
Frequently Asked Questions
Q: How do I know if this filter fits my spa?
A: Measure your existing cartridge or check the part number printed on the end cap. This filter is 225mm tall and 135mm in outer diameter, with a 46mm fine thread on the bottom and a handle on top. If you're unsure, contact us with your spa brand and model.
Q: How often should I replace my spa filter?
A: As a general guide, replace your cartridge every 12 months with regular weekly rinsing and monthly soaking. Spas used heavily or by multiple people may need more frequent replacement.
Q: Can I clean this filter instead of replacing it?
A: Yes. Regular rinsing and monthly chemical soaking extends cartridge life significantly. However, once the pleated media shows physical damage, persistent discolouration, or your water clarity doesn't improve after cleaning, it's time to replace.
Q: Should I keep a spare filter?
A: Yes, and it's one of the best things you can do for your spa. Rotating between two cartridges means one is always clean and dry, ready to go in while the other soaks or dries. It also extends the life of both filters.
Q: What's the difference between a Freeflow 46 and other spa filters?
A: The "46" refers to the filter area in square feet. Different spa models require different filter sizes and configurations. The 225 x 135mm dimension is the physical size of this cartridge. Always match both the dimensions and the end cap configuration to your existing filter.
Q: Is this in stock?
A: Stock levels are shown live on this page. We hold this filter in stock at our Albany, Auckland warehouse for fast NZ-wide dispatch.
Pickup and Delivery
Perfect Pools Service Warehouse, 15C Douglas Alexander Parade, Albany, Auckland
Hours: Mon-Fri 9am-4pm | Sat 10am-2pm
NZ-wide delivery available. Charges calculated at checkout.
Questions? Visit our contact page.
