Step-by-Step Filter Replacement Guide for Pure n Natural Systems

Changing air or water filters is easy - and it saves money on repairs while improving your health. Follow this simple step-by-step guide based on Pure n Natural’s top-selling systems.

• Pro tip: Browse our full replacement filters catalog to find the right model for your unit.

Why Replacing Filters Matters

Regular filter replacement ensures your air and water systems perform efficiently, reduce energy use, and maintain healthy indoor quality. Overused filters restrict airflow or water pressure, forcing equipment to work harder - and that means higher costs and reduced lifespan.

Tools & Preparation

Before you begin, gather the following items:

• Clean towel or gloves (to keep things sanitary)
• Replacement filter - match brand and model: Pure n Natural Filter Replacements
• Trash bag for the used filter

Step-by-Step: Air Systems

Airpura Air Purifier

1. Unplug the machine.
2. Open the access panel (slides or screws).
3. Carefully pull out the old filter.
4. Insert the new filter (arrow → airflow).
5. Close the panel and plug the unit back in.

Find your correct Airpura filter in our Air Purifier Replacement Filters collection.

Smokemaster Smoke Eater

1. Turn off the unit, then open the cover.
2. Remove and bag the used pre-filter and main filter.
3. Insert the new filters in order, ensuring each fits snugly.
4. Reset the maintenance reminder (if your unit includes one).

For more ongoing maintenance ideas, read Tips to Boost Indoor Air Quality.

Step-by-Step: Water System

Oasis Water Filter

1. Turn off the water supply.
2. Unscrew the old cartridge and let the water drip out.
3. Install the new cartridge (ensure a snug fit with no leaks).
4. Turn the water back on and flush out 2–3 gallons before use.

To confirm what your system removes, see What Do Water Filters Remove from Your Drinking Water?

Find the right replacement cartridge in our Replacement Water Filters & Cartridges collection.

Disposal Guidelines

• Place old filters in a sealed plastic bag to contain dust or bacteria.
• Most carbon or particulate filters can be disposed of with household trash.
• Check local regulations if disposing of many used commercial filters.

Troubleshooting Tips

If airflow still seems weak, check:

• Is the filter fully inserted and facing the right direction?
• Are exterior vents blocked?
• Did you reset reminders or timers?

If water still tastes off:

• Run water for five minutes. If the taste persists, double-check that the cartridge model matches your system.

Keep Your System Running Smoothly

Order your replacement filters from our All Water & Air Replacement Filters collection today — and never miss a cycle with our auto-ship subscription option.

You might also enjoy our guide on Levels of Cigar Room Ventilation (Updated 2025) if you manage smoke-heavy indoor spaces.

Still have questions? Contact us and get personalized recommendations within an hour.