Description
Overview
These replacement spa filter cartridges are built specifically for Galaxy Spa systems and proudly made in New Zealand by Magnum Filters, trusted in the industry for over 40 years. Durable, easy to fit, and designed to match original specifications, these cartridges help keep your spa water clear and running smoothly.
You’ve got two compatible options, depending on the connection type of your existing cartridge.
Filter Options
GX25 – Bayonet Thread
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Outside Diameter: 143 mm
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Length: 204 mm
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Top End Cap: ½ round handle (replaces original star handle)
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Bottom End Cap: Male thread with bayonet lock
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Best for Galaxy Spa models using a bayonet-style fitting
WY45 – Coarse Thread
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Outside Diameter: 143 mm
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Length: 204 mm
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Top End Cap: Bar handle (also replaces original star handle)
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Bottom End Cap: Male coarse thread
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Slightly longer than original, but fully compatible
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Use if your current filter has a screw-in thread, not a bayonet
Why Choose Magnum Filters?
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NZ-made quality, built for local conditions
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Long-lasting media and strong end caps
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Reliable performance in Galaxy Spa systems
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Easy to install and replace
FAQs
1. How do I know if I need a GX25 or a WY45 filter?
Check the bottom end of your existing filter. If it locks in with a bayonet-style twist, go with GX25. If it screws in with coarse threading, choose WY45.
2. Are these genuine Magnum filters?
Yes, both GX25 and WY45 are made in New Zealand by Magnum Filters, a trusted spa filter manufacturer for over 40 years.
3. Can I use the Galaxy Spa Filter Cartridges in other spa brands?
These are designed specifically for Galaxy Spas. They may fit other models with the same specs, but it’s best to confirm dimensions and thread type before purchasing.
4. How often should I replace my spa filter cartridge?
Typically, every 12 months, or sooner if water clarity drops or flow is restricted. Regular rinsing helps extend the life between replacements.
5. What if my current filter has a star-shaped handle?
No worries—these replacements come with round or bar handles but are still fully compatible with the original star handle models.