AQUALTRA Hot Tub Screw-In Filter 35 sq.ft. 2 Pack — 5 1/4" x 12 3/16" 2" Male MPT, Washable NSF-Certified

AQUALTRA's 35 sq.ft. screw-in hot tub filter is a washable, NSF-certified replacement that fits 5CH-352, PPM35SC-F2M and several Marquis spa models for clearer water and longer equipment life.

If you own a compatible hot tub or spa, this two-pack of AQUALTRA filters gives you a ready spare while keeping circulation and filtration working at peak efficiency. Each cartridge measures 5 1/4" outer diameter by 12 3/16" long and uses a 2" male MPT screw-in base for a secure fit. Designed from PET composite fabric with a polypropylene core and chlorine-resistant end caps, the cartridges are NSF/ANSI certified materials and free of BPA.

How will this filter improve my hot tub’s water clarity?

The AQUALTRA filter uses layered PET composite media and a reinforced core to trap fine debris that ordinary filters miss. Its construction favors higher surface area and a "dirt-locking" behavior, capturing hair, sand, dust, and organic particles so your pump and sanitizer work less hard.

• 35 sq.ft. of filtration media to catch fine particulates
• Composite fabric that resists chlorine degradation
• Reduces visible debris and extends the effective life of chemical treatment

Is this cartridge easy to clean and reuse?

Yes—these replacement cartridges are washable and intended for repeated use. Rinse or soak to remove trapped particles, then allow to dry if storing; regular maintenance preserves flow and filtration performance.

• Wash every two weeks under normal use for best performance
• Use a hose or filter cleaner for deeper rinsing; avoid harsh tools that could damage media
• Remove the filter before cleaning equipment that could cause corrosion

Which hot tubs and fittings are compatible with this filter?

The cartridge is built for screw-in installations with a 2" male MPT thread and fits many common replacement part numbers. AQUALTRA lists compatibility with 5CH-352, PPM35SC, Marquis Spa part numbers 20042 and 20092, 70-0240, 370-0242, 370-0243, FC-0196, and other models that accept the same dimensions and thread.

• Outer diameter 5 1/4", length 12 3/16" for dimensional match
• 2" Male MPT screw-in base for secure connection
• Check your spa’s part number to confirm fit before purchasing

What should I expect in durability and safety?

AQUALTRA manufactures these cartridges from NSF/ANSI‑certified materials designed to resist chlorine and regular cleaning cycles. The end caps and core are made from durable, non‑BPA plastics to limit breakdown over many cycles of use and washing.

• High chlorine-resistant end caps and a polypropylene core
• BPA-free materials certified against NSF/ANSI standards
• Designed for repeated washing and long-term service life

Who is this for: This two-pack from AQUALTRA suits spa owners who need a reliable, cost-effective replacement for screw-in cartridges in mid-sized hot tubs that specify a 35 sq.ft. 5 1/4" × 12 3/16" filter with a 2" MPT thread. It’s ideal for people who prefer washable, reusable filters, want NSF-certified materials, and need compatibility with common part numbers so their spa stays clean and runs efficiently.