What Can Go Down The Drain?

When it comes to chemicals and certain substances, knowing whether they can go down the drain can be confusing. In this article, we will talk about what can go down the drain and give you guidance on what can’t go down the drain.

As a golden rule, the only substances that are allowed down the drain must be non hazardous, liquid and of that will not interfere with sewage treatment operations.

To further explain what we mean by these terms…

Non Hazardous:

  • No radioactive waste
  • No hazardous chemical waste
  • No untreated biohazardous waste


  • No solids, sludges or viscous liquids

Will not interfere with sewage treatment operations:

  • No corrosive pH levels
  • No grease, oil or fat

When we think of all these terms, it is easy to believe that it is only chemicals that are hazardous and/or interfere with the sewage treatment. However, many households will dispose of common household items via the drain, not knowing that they are potentially harming the system.

These substances include…

  • Flour – especially when washing up baking gear in the kitchen sink.
  • Toiletries
  • Coffee Grounds
  • Medication
  • Pasta and Rice

If you’re still unsure after reading this, you can always use support that is given on the internet or you can ask your plumber or people who are specialised in water treatment.

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