Water Purifier Buying Guide: TDS1, Nova 100 and No-Plumbing RO

Use this guide to move from a simple water check to a clear buying decision. Start with TDS1, join How Clean Is My Water, compare no-plumbing countertop reverse osmosis for rented flats and small kitchens, then check whether Nova 100 fits your routine.

Start the water check | Get TDS1 | View Nova 100

Choose in three steps

1. Test with TDS1

Use TDS1 as a quick dissolved-solids comparison signal. Test your tap water, keep the reading, and use it to compare before and after filtration.

2. Join How Clean Is My Water

Use the challenge to upload or share your result, check the current launch credit activity, and turn the test into a purchase-ready next step.

3. Compare Nova 100

If you rent, have a small kitchen or cannot drill, compare Nova 100 as a no-plumbing countertop RO route for daily drinking water.

Quick answers

How do TDS1, the challenge and Nova 100 connect?

TDS1 gives you a quick water reading. How Clean Is My Water turns that reading into a next step. Nova 100 is the OtherWater route to compare when you want a no-plumbing countertop RO purifier for daily drinking water.

What is the best route for renters and flats?

If you cannot drill, install under the sink or change plumbing, compare countertop purifiers that use a refillable tank. Check counter space, socket access, tank routine and filter replacement before choosing.

When should I upgrade from a jug filter like Brita or ZeroWater?

Brita, PUR and ZeroWater-style jugs are easy entry options. Countertop RO is the upgrade path for buyers who want a stronger point-of-use routine, no permanent plumbing and clearer product support.