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OnBuy.com£58.21Visit shop 5114692 Baxi Platinum Combi Expansion Vessel 10 Litre For 33/40 He & 33/40 He A 3809200413286
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This 10-litre expansion vessel is for owners of Baxi Platinum Combi 33 HE & 33 40 HE A boilers, and compatible models like the Baxi 105 HE A INSTANT. Its key benefit is maintaining stable system pressure, ensuring efficient and safe heating operation by absorbing excess water pressure. A potential caveat is that installation requires professional knowledge of heating systems.
| Model Part Number | 5114692 |
|---|---|
| Brand | Baxi |
An expansion vessel is a crucial component in a sealed central heating system. It contains a flexible diaphragm separating air from system water. As water heats and expands, it is absorbed by the vessel, preventing excessive pressure build-up and protecting the system.
Common signs include the pressure relief valve discharging water, the system pressure being too high when cold or fluctuating erratically, or frequent pressure loss. A professional heating engineer can diagnose this.
No, installation should only be carried out by a qualified Gas Safe registered engineer. Improper installation can be dangerous and may damage your boiler or heating system.
The pre-charge pressure should typically match the system's cold 'cut-in' pressure, usually around 1 bar (15 psi). However, always refer to your specific boiler's manual or consult a qualified engineer for the precise requirement.
This 10-litre vessel is specifically designed for certain Baxi Platinum Combi and Duo Tec HE A models. It is essential to check your boiler's manual or consult a professional to confirm compatibility before purchasing.
With correct installation and regular system servicing, an expansion vessel can last many years. However, the internal diaphragm can degrade over time, potentially leading to failure.
If the expansion vessel fails, the system pressure will rise excessively when heated. This can trigger the pressure relief valve to discharge water, leading to system pressure loss, or potentially cause damage to the boiler and pipework.
This often indicates a faulty or de-gassed expansion vessel. The internal diaphragm may have failed, or the air charge may be lost. Requires professional inspection and potential replacement.
This is a common symptom of an expansion vessel that is not absorbing excess pressure. The system pressure is exceeding the relief valve's set point. The vessel likely needs replacement by a qualified engineer.
An under-performing expansion vessel could lead to pressure warnings. Ensure the vessel's pre-charge is correct and the diaphragm is intact. Professional diagnosis is recommended.
Compatibility: This expansion vessel (Part Number 5114692) is primarily designed for Baxi Platinum Combi 33 HE & 33 40 HE A boilers. It is also compatible with Baxi 105 HE A INSTANT, Baxi COMBI 33 HE, Baxi DUO TEC 24 HE, Baxi DUO TEC 28 HE, and Baxi DUO TEC 33 HE models. Always confirm your boiler's model and manual for exact part compatibility.
Setup: Installation of an expansion vessel should only be performed by a qualified Gas Safe registered engineer. The process typically involves isolating the heating system, draining down a portion of the water, disconnecting the old vessel, installing the new one, and then repressurising and bleeding the system. Crucially, the vessel must be correctly pre-charged with air pressure to match the system's cold fill pressure before installation.
Care: Expansion vessels are generally maintenance-free once correctly installed. However, it is good practice to have your heating system serviced annually by a qualified engineer. During a service, the engineer can check the pre-charge pressure of the expansion vessel and the overall system pressure to ensure continued optimal performance and safety. Do not attempt to adjust the vessel's pressure yourself unless you are qualified to do so.
