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

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

Start the water check | Get the TDS1 water quality test pen | View Nova 100 countertop RO purifier

Choose a water purifier in three steps

1. Test your tap water with TDS1

Use TDS1 as a quick dissolved-solids comparison signal. Test your tap water, keep the reading, and compare before and after filtration results when reviewing purifier options.

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 practical next step before buying.

3. Compare Nova 100 for no-plumbing RO

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

Quick answers about TDS1, Nova 100 and no-plumbing water purifiers

How do TDS1, How Clean Is My Water and Nova 100 connect?

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

What is the best water purifier 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 for basic taste improvement. Countertop RO is the upgrade path for buyers who want a stronger point-of-use routine, no permanent plumbing and clearer product support.

Brita, ZeroWater and PUR vs countertop RO: when should UK renters upgrade?

Brita, ZeroWater and PUR are familiar starting points for everyday tap-water filtering, but they solve a different buying problem from a countertop reverse osmosis purifier. A jug or cartridge filter is often chosen for taste, convenience or first-step filtration. Countertop RO becomes the stronger upgrade route when you want dissolved-solids reduction, a visible before-and-after TDS reading and a purifier that does not need permanent plumbing.

  • Choose a jug or cartridge filter when low upfront cost and basic taste improvement matter most.
  • Choose countertop RO when high TDS, hard-water concerns, flat restrictions or small-kitchen setup make a no-plumbing purifier more practical.
  • Use TDS1 to compare tap water with filtered water before deciding whether an upgrade is worthwhile.
  • Consider Nova 100 when you want a no-plumbing countertop RO route for a rented flat, London apartment or compact kitchen.

For the Other Water route, start with TDS1, compare the result, then review Nova 100 countertop RO.