How To Choose Lab Water System

Choosing the right lab water purification system can sometimes seem quite complicated, however, by sorting out your situation and proposals from purifier providers from the below categories, you will find it quite confident to answer how to choose a lab water system.

Key questions you ought to think about to answer

  • What quality standard do you need to follow?
  • Volume and flow rate requirements?
  • Quality of your feed water.
  • Monitoring of key quality parameters.
  • Your laboratory floor space availability.

Determine the right type of water you need.

People tend to call lab water differently from their habits, HPLC water, UP water, grade 1 water, or even by water brands, read the blog article on the right side of this block or check out our webpage to know what “type” really means here. To give you what official standards call lab water, some terms you will read include:

  • Feed water-is potable tap water you feed your system
  • Type 3 water-basically filtered, also called DI or IO water
  • Type 2 water-purity of which is in between that of type 1 & 3
  • Type 1 water-is treated to the highest level of purity
  • RO water – reverse osmosis filtered water
  • DI water- deionized water

Usually, tissue or cell culture, mass spectrometry, HPLC, and GC demands for type 1 ultrapure water.


Knowing what quality standard your lab water must meet.

The first thing you need to be clear about is what quality standard applies to your lab, quickly check out the most commonly adopted standards on the left-side blog and find out the parameters you must meet, or visit the websites of these organizations directly from the below links:

  1. ASTM: American Society for Testing and Materials
  2. ISO: International Organization for Standardization
  3. CLSI/NCCLS: Clinical and Laboratory Standards Institute
  4. USP: United States Pharmacopoeia
  5. EP: European Pharmacopoeia

Estimate the total volume of water and flow rate that suits your lab

Make the best estimate of the volume of water your lab will use in a normal day, will you demand to be continuous or in batches? This information will be needed to determine the right capacity you need to install and help us to proposal the right model for you.


Quality of feed water & long-term cost

Quality of feed water, which is the water input to the purification system, determines the purifying load on the system and relates greatly to how long cartridges can be used and eventually to the cost per liter of water treated and used in your lab.

Quite often, we recommend our clients add additional pre-filtration units instead of directly feeding with city water, especially for clients running labs in areas the quality of tap water is not ideal.

Other costs to be aware of are the one-time purchase cost of the system and the amount of water consumed in the lab.


Type 2 Water

Has a resistivity of over 1 MΩ.cm. It’s cleaner than Type III water, but it’s far from ultrapure. You probably use it for applications like:

  • Sample dilution
  • Media preparation
  • Radioimmunoassay
  • Electrochemistry

It’s also ideal for feeding lab instruments and clinical analyzers because of the low calcium buildup.

Our InviPure LabUni Ultrapure Water System generates both type 2 and type 1 water, it suits the universal requirement of almost all labs that uses water.


Type 3 Water

Has a resistivity of over 4 MΩ.cm. And it’s generally produced through reverse osmosis, which removes up to 99% of contaminants.

What applications use Type III water?

  • General deionization
  • Humidification
  • Battery water refilling
  • Glassware washing and rinsing
  • Hydrogen generators
  • Sterilizers
  • Environmental chambers
  • Ultrasonic cleaners
  • Chiller loops

Our InviPure LabPrim Ultrapure Water System generates both type 3 and type 1 water, it is designed to meet labs that need to have primary ultrapure water and general RO water demands.


Type 1 Water

Has a resistivity of more than 18.2 MΩ.cm, and eliminates all RNase, DNase, Pyrogen, and/or Endotoxins.

Usually, it’s required for analytical labs – applications like:

  • HPLC
  • Cell or tissue culture
  • GC
  • Mass spectrometry

Our InviPure LabPrim Ultrapure Water System generates both type 3 and type 1 water, it is designed to meet labs that need to have primary ultrapure water and general IO water demands.

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