Frequently Asked Questions

What is reverse osmosis?

Reverse osmosis (RO) is a filtration process that pushes water through a semi-permeable membrane to reduce dissolved solids and many other contaminants.

Which TNT system is right for me?

See our comparison page or call us at +1 (773) 502-7999.

How often should I replace the filters?

Sediment and carbon cartridges are typically replaced every 6–12 months depending on water quality and usage. The RO membrane lasts longer.

Do you offer installation?

Yes, professional installation is available for $50 in nearby service areas, subject to location confirmation. Installation is not included in the system price. Check your ZIP for installation availability.

What is your warranty?

3-Year Manufacturer’s Warranty: Coverage is limited to replacement of parts confirmed to have manufacturing defects. Installation and shipping costs are not covered.

Can I install the system myself?

Each system includes a complete installation kit. If you prefer, contact us about professional installation.