Replacement Cartridge
Replacement Cartridge Subscription
Replace your cartridge every 6 months for optimal filtration. Save when you subscribe.
Best Value
Subscribe & Save
$19.99Save 20%
Delivered every 6 months
- Free shipping on every delivery
- Cancel or pause anytime
- Automatic reminders before shipment
One-Time Purchase
$24.99
Single cartridge, no commitment
- Same 4-stage filtration cartridge
- 6-month cartridge life
- No subscription required
You will be redirected to our Shopify store to complete your order.
How It Works
Effortless
replacement.
Choose your plan
Subscribe for automatic delivery every 6 months, or buy a single cartridge when you need it.
We ship before you run out
Your new cartridge arrives before the old one expires. No gaps in filtration.
Swap in under 60 seconds
Unscrew, remove, replace. No tools, no plumber. Just clean water, always.
Free shipping on every delivery
Cancel or pause anytime
Automatic reminders before each shipment
Priority access to new products
Frequently asked questions.
Subscribe & Save
Never run out
of clean water.
Set up automatic delivery and your SYNONX cartridge will arrive before you run out. Save 17% on every refill.