Replacement O-ring for thermostatic cartridge

Product detailed description

O-ring for the Laddomat thermostatic cartridge

Code P0109 designates a replacement O-ring that is used together with the thermostatic cartridge in the Laddomat assembly on ATMOS boilers. It is a small sealing part from the group of Laddomat spare parts.

Are you also looking for the cartridge itself? Have a look at our range of replacement thermostatic cartridges for Laddomat.

Before ordering, check which type of boiler and Laddomat you have installed, so that the part matches your appliance.

Frequently asked questions

• How can I check that the "Replacement O-ring for thermostatic cartridge" fits my appliance exactly? The most reliable way is to compare the exact type/catalogue designation from the rating plate of your appliance (boiler, storage tank, water heater) with the compatibility stated directly in the name of this product (brand Atmos) and in its technical parameters above. If in doubt, send us the exact type designation of your appliance (including the serial number, if applicable) and we will gladly verify the compatibility for you.
• Why is it important to use precisely the original/compatible part and not a universal replacement? Parts such as seals, sensors or safety components (safety valves, thermal fuses) are generally dimensioned exactly for the parameters of the particular appliance (pressure, temperature, electrical resistance of the sensor) - an incorrect part may cause reduced functionality, leaks, or, in the case of safety components, even a real safety risk.
• Does this part have to be installed by a professional? For simpler, mechanical parts (e.g. seals, covers, minor accessories with no connection to electricity, gas or the pressure part), a skilled DIY enthusiast can usually handle the replacement after disconnecting the appliance from the power supply and the piping. However, for any work on the gas, electrical or pressure part of the appliance (e.g. sensors directly in the combustion chamber, safety valves, electrical modules), we always recommend a service technician - especially if the intervention could affect the warranty of the entire appliance.
• How do I know that this part is worn and needs to be replaced? Common signs are visible wear/cracking (for seals and rubber parts), a leak of water or flue gases at the location of the part, an error message on the controller display (for sensors and electronic modules), or clearly reduced functionality of the appliance (e.g. irregular burning for burner parts). If in doubt, it is safest to have the condition assessed by a service technician during the regular annual inspection.
• Is it worth keeping this part at home as a spare? For parts that are normally subject to wear (seals, fuses, small mechanical parts) and whose failure would mean a shutdown of heating or water heating, keeping a stock is a sensible precaution - especially for an older appliance, for which it may be harder to find the part quickly.