5 Series RO400 RO Filter

Designed for our UR5440 model, this reverse osmosis (RO) filter uses three-membrane layers to remove over 90% of fine particles like bacteria, heavy metals, and total dissolved solids (TDS) down to 0.0001μm.

Independently tested performance

Independently tested to remove

heavy metals and industrial

pollutants like lead, cadmium and

chromium III¹.

30% more clean water².

Equipped with anti-scaling

materials and high quality carbon

to reduce clogging, our 5 Series can

filter up to 30% more water².

Tool-free filter replacement

Easily change filters in four simple steps with our

snap in, snap out design.

Need further assistance? Get installation support.

  • Filter Type
    RO400 Reverse Osmosis Membrane Filter
  • Dimensions
    4" (dia) x 13.2" H
  • Product weight
    2.49 lbs
  • Recommended filter change
    2-3 years*
  • Number of filters
  • Compatible with
    UR5440 model

*The recommended filter lifetime is for reference only, the specific replacement cycle depends on the water source and frequency of use. The filter lifetime indicator alerts you when filters need to be replaced.

Guarantee clean water for years to come with extended warranty coverage when you register your air purifier.

What is WQA and why is being Gold Seal Certified important?

The Water Quality Association (WQA) is a leading voice of the commercial, industrial and residential water treatment industry. Pureit is one of the few tankless, RO water purifier brands that is WQA Gold Seal-certified. This is reserved only for products that pass the rigorous testing requirements of industry standards for quality, durability, and safety.​ This ensures that the product is constructed from safe materials, the claims listed on the packaging are backed by test data, and the product will hold up under normal usage conditions.

Is there an automatic flushing function for UR5440/UR5640?

Yes, both models have a built-in automatic flushing that will flush your water purifier for 30 seconds if it has not been used for 12 hours.

Where can I purchase replacement filters?

Please visit www.pureitglobal.com/us for purchasing replacement filters.

How do I know when to change my filters?

PGP/CTO filter: Recommended 6 – 12 months

RO filter: Recommended 2 - 3 years

The Pureit UR5440/UR5640 water purifiers have a built-in filter life indicator that will remind you when it is time to replace your filter. Actual replacement time will vary by usage and local water conditions.

Can I get professional installation assistance?

Currently, Pureit is offering a Pro Service in selected cities, please contact the Customer Support team [info@us.pureitwater.com] for a plumber referral and more information.

Additional Filters

1.See Performance Data Sheet

2. Compared to without DURAviva technology. Testing was performed under standard laboratory conditions with water hardness of 230 - 270 mg/L, TDS 450 - 550 mg/L. Actual filter performance may vary.