01

Before you start

Confirm that this method matches both the fixture and likely obstruction. Prepare for spills, protect the surrounding surface and keep the work area away from children and pets.

  • Original labelled product
  • Measuring cap or dose pack
  • Specified personal protection
  • A period when the drain can remain unused
02

What a successful result looks like

Normal flow should return without leakage, gurgling or backup elsewhere. If the result is partial or short-lived, stop repeating the same process and investigate farther along the line.

  • Stable water level
  • Normal drainage speed
  • No leak at disturbed joints
  • No symptom in a connected fixture
03

Step-by-step approach

  1. 1

    Read the label and confirm compatibility

  2. 2

    Avoid conflicting cleaners

  3. 3

    Apply the measured dose

  4. 4

    Leave the drain unused for the stated time

  5. 5

    Review the result before starting maintenance dosing

Important safety point

Keep biological products in their original container and away from children and pets. Do not improvise doses or mix with other cleaners.