Water Testing

Filter & sort

30 Products

Ordering from Rein Water

What to expect

  • Ships direct from the manufacturer

    Every order is packed and shipped by the brand that makes it. We submit your order to them within 2 business days.

  • Estimated delivery on product pages

    Brondell, Crystal Quest and Waterdrop product pages show a dated delivery window under the buy button before you order.

  • Returns by brand

    Each manufacturer sets its own return window and restocking fee. Check the terms for your brand before you order.

    Return terms by brand
  • Tracking as soon as it ships

    We email your tracking number within 1 business day of the shipment leaving the manufacturer.

How to choose a water test kit

A test tells you what is in your water before you spend on treatment. Single-parameter kits answer one question; multi-parameter kits and TDS meters give a broader picture in a few minutes at the sink. For a private well, a laboratory test is the fuller option. This collection is from Crystal Quest and WaterWorld USA.

Who it is for

Anyone choosing a filtration system, homeowners with a new water report to check, and well owners testing on a schedule. A test before and after installation also shows what a system is doing.

What to compare

  • Which parameters the kit covers, listed on each product page.
  • Strip, drop or digital meter: strips are quickest, meters give a number you can track over time.
  • Number of tests per kit.
  • A TDS meter is also the simplest way to check that a reverse osmosis system is working.

Ships direct from the manufacturer.

Common questions

On city water, a TDS meter and a hardness test cover most decisions. On a well, start with a broad multi-parameter kit or a laboratory test.

Send them to us with your household size and we will suggest a shortlist, or use the quiz on the collection that matches your water source.