Disclaimer

General information only

Everything on OwnerSpec is published for general information. It is not professional advice and it cannot account for your specific property, equipment, supply or local rules. Use it to understand a problem and to ask a professional better questions, not to replace one.

Health

Some of what we cover touches drinking water and indoor air. Nothing on this site is medical advice. We do not diagnose any condition, and we do not claim that any product prevents, treats or cures anything. If you believe your water, air or home is making you unwell, contact your doctor and your local public-health or water authority.

Where we cite a contaminant limit, it is the published regulatory or standards figure with a source, not our opinion of what is safe for you.

Test your own supply

Published figures are averages and regional typicals. The only thing that tells you what is in your own supply is a test of your own supply, from a certified laboratory where the question matters.

Installation and safety

Plumbing, gas and electrical work is regulated in most countries and unqualified work can void insurance, breach building regulations, damage property and injure people. Where we describe how something is installed, it is to help you understand the job and its cost, not an instruction to do it yourself. Use a licensed professional and follow the manufacturer’s instructions, which override anything written here.

Regulations differ

Standards, permitted limits and certification marks differ by country and often by region. What is compliant in one place may not be in another. Check what applies where you live.

No warranty

We research from primary sources and correct errors when we find them, but we give no warranty of accuracy, completeness or fitness for purpose. To the fullest extent permitted by law we accept no liability for any loss or damage arising from reliance on this site. See our terms of use.

Last updated: 11 September 2026.