Features we love
- Spa filter replacement for 75Ā sq. ft filtration space
- Removes scum such as hair, dust, leaves and more
- Delivers safe clean water and is resilient to chlorine
Need to know
Measures: 17.8cm x 36.1cm.
Top Hole: Semi Circular (removable for dispenser).
Bottom Hole: 7.4cm.
Compatibility
The HTF0475 Filter is suitable for: Caldera 75.
Our Ref: HTF0475 |Ā Pleatco: PCD75N |Ā Unicel:Ā C-7375 |Ā Filbur: FC-3964 |Ā Darlly:Ā 77515
FAQs
How does a hot tub filter work?
Water is pumped through the filter, and any debris gets caught in the filterās pleats. Hot tub filters work alongside chemicals and sanitisers to keep the hot tub water clean and healthy.
How often should I clean my hot tub filters?
We recommend rinsing your hot tub filters once a week and giving them a full clean with cleaning tablets or powder every 4-6 weeks. This will ensure dirt, debris and pollutants are cleared quickly and effectively and will extend the life of your filter. A clean hot tub filter gives you more accurate results when testing the chemicals, meaning you could save money.
If you need more advice on keeping your filters clean, read our how to clean your hot tub filters guide.
How long should my hot tub filters last?
Having a spare filter to rotate when cleaning means that they can last up to 18 months. If youāre not rotating with a spare, you should expect to replace them every 12 months. Purchasing genuine branded hot tub filters allows your system to run more efficiently, thus allowing a more reliable circulation of water and easier maintenance.


















Emma Thompson –
The HTF0475 75sq Ft Hot Tub Filter for Caldera 75 is a fantastic upgrade! It fits perfectly and the water clarity has improved significantly. Highly recommend for anyone with a Caldera hot tub.
James Wilson –
Great filter, easy to install and seems to be doing a brilliant job keeping my hot tub clean. The quality is top-notch and itās built to last.
Sarah Johnson –
Iāve been using this filter for a few weeks now and itās made a noticeable difference. The water feels cleaner and I havenāt had to clean the tub as frequently.
Michael Brown –
Works well, but I expected a bit more durability. Itās effective, but Iām not sure how long it will last with regular use.
Lisa Green –
This filter is a must-have for Caldera hot tub owners. Itās efficient, easy to maintain, and keeps the water crystal clear. Very pleased with the purchase.
David White –
Good value for money. The filter does its job well and is compatible with my Caldera 75. Would buy again.
Karen Black –
Iām impressed with the performance of this filter. Itās easy to clean and has improved the water quality in my hot tub.
Peter Harris –
The filter works as expected, but I found it slightly tricky to install. Once in place, it performs well.
Rachel Scott –
Excellent product! The HTF0475 fits perfectly and has made a noticeable difference in maintaining the cleanliness of my hot tub. Highly recommended!