To remove limescale, sludge and metal oxides inside boiler and system

How to use

Add TOPTHERM CLEAN 10 to the system from whatever part of it using INJET vessel. Before administration, ensure that the water does not contain other chemicals. It must circulate inside the system from 3 up to 30 days using the boiler’s pump, with the boiler on or off. Once the cleaning operation is finished, the system should be well drained and rinsed. Rinsing should continue until clear water runs out. Refill the system with TOPTHERM PROTECT 1 to avoid corrosion, limescale and sludge formation.


Add from 7 to 10 kg of TOPTHERM CLEAN 10 for every 100 litres of water in the system (houses from 80 to 100 m²). Lower concentrations do not yield satisfactory results. Any higher concentration do not cause problems.

Environmental and safety information

TOPTHERM CLEAN 10 has a neutral pH and it is not classified as hazardous substance. It does not corrode metals (iron- aluminium- copper) nor plastics. Do not allow the product to reach potable waters. Do not mix to other chemicals. Do not ingest. Do not dispose of waste through the environment.


Scale 0 ÷ 1999 μS, 2 ÷ 20.00 mS


CLEAN 10: to be used with the boiler circulator

Cleaning operation
• Before administration, ensure that the system does not contain other chemicals than TOPTHERM. If in doubt, drain the system and refill it with clean mains water.
• Check the water volume inside the system or the house dimensions.
• Ensure to have the right quantity of CLEAN 10 available (lower concentrations than the recommended do not yield satisfactory results. Any higher concentration do not cause problems.)
• Add the product to the pressurisable INJET vessel.
• Connect the INJET joint to a radiator valve, to the jolly-valve, or to the safety-valve of the boiler and add the product inside the system.
Let the product circulate inside the system from 3 to 30 days.
• Best result are given both with the boiler on (hot water) and with the boiler off (cold water).

Rinsing operation

• Connect a pipe to the mains water tap (min. flow rate 10-12 liters / minutes and pressure more than 2 bar) and to the inlet of system.
• Connect a flexible pipe from the return of the system to a discharge point.
• Close all the radiators leaving only one radiator open.
• Open the mains water tap and let the water flow checking the colour of the water drained.
• Once the water become clear and colourless, take a sample of water from the bleed valve of a collector and check that even there water is clear.
• If dirty, continue the rinsing operation until the water is clear and colourless.
• If clean, close the radiator you are rinsing and open another radiator.
• Repeat the operation for every collector on the system until the circuit has been thoroughly rinsed.
• Once the rinsing operation has finished, open the whole circuit with the rinsing water tap opened and check visually that water is colourless as the mains water, or check that salinity of water is the same of that of mains water (max +10%), using a conductimeter.
• If the salinity is not the same, keep the water flowing until it is as clean as the mains water.
PS: it is possible to make the rinsing operation using the external pump TOPFLUSH.


Add the right quantity of inhibitor PROTECT 1 to the system, then check with P-TEST that the concentration is correct. Stick on the boiler the label on the side of the PROTECT 1 bottle specifying the quantity of product added to the system and the date.