LA Spas Various Models Replacement Filter
6-person hot tub · 2000-present · 2 filter cartridges
Compatible Filter Cartridges
35 sq ft · 5.375″ OD × 8.5625″ long
Heads up: the LA Spas Various Models runs 2 cartridges. Replace them as a set, not one at a time.
| Pleatco | PLAS35 |
| Unicel | 5CH-203 |
| Filbur | FC-0303 |
| OEM | LA Spas HTF-303 |
| OEM | LA Spas FD-51500 |
Frequently Asked Questions
What filter cartridge does the LA Spas Various Models use?
The LA Spas Various Models runs the PLAS35 (also sold as 5CH-203, same physical cartridge with a different sticker). Confirm by reading the label inside the filter compartment or the part number printed on the end cap of your existing cartridge before you order.
How many filters does the LA Spas Various Models need?
2 cartridges. Replace all of them at once. If you put a fresh cartridge in next to a worn one, the new one ends up carrying disproportionate load and burns out faster than it should. Pop open the filter housing and count what's installed before you order, just to confirm the count for your specific serial number.
How often should I replace the filter on my LA Spas Various Models?
Most LA Spas owners get 12 to 24 months out of a cartridge before replacing it, depending on how heavily the spa is used. Rinse it monthly with a hose, hitting the pleats at about a 45-degree angle. Soak it overnight in filter cleaner every three to four months. Replace it when the pleats are torn, the seams are stained brown and won't come clean, or a soak no longer drops the post-rinse pressure.