Description
Baxi Boiler Duo Tec 40 HE A Expansion Vessel 10 Litre 5114692
The Baxi Duo Tec 40HE A Expansion Vessel 10 Litre + PRV 5114692 controls pressure changes inside your boiler during heating cycles. This expansion vessel absorbs excess pressure while the pressure relief valve protects the system from over-pressurisation. As a result, your boiler runs more smoothly and safely. Since this unit is brand new, it delivers reliable performance and long service life from first installation.
Compatible Boilers
Baxi Instant and Duo Tec Series
Baxi 105 HE A Instant (GC No. 47-075-50)
Baxi Duo Tec 24 HE (GC No. 47-075-23)
Baxi Duo Tec 28 HE (GC No. 47-075-25)
Baxi Duo Tec 33 HE (GC No. 47-075-24)
Baxi Duo Tec 33 HE A After Serial No. BTH1112 Issue 9 (GC No. 47-075-37)
Baxi Duo Tec 33 HE A Before Serial No. BTH1112 Issue 8 (GC No. 47-075-37 BEFORE)
Baxi Duo Tec 40 HE (GC No. 47-075-26)
Baxi Duo Tec 40 HE A Issue 8 (GC No. 47-075-38)
Baxi Combi Series
Baxi Combi 33 HE (GC No. 47-075-22)
Baxi Platinum Combi Series
Baxi Platinum Combi 24 HE (GC No. 47-075-27)
Baxi Platinum Combi 28 HE (GC No. 47-075-28)
Baxi Platinum Combi 33 HE (GC No. 47-075-29)
Baxi Platinum Combi 33 HE A After Serial No. BNE1112 Issue 5 (GC No. 47-075-33)
Baxi Platinum Combi 33 HE A Before Serial No. BNE1112 Issue 6 (GC No. 47-075-33 BEFORE)
Baxi Platinum Combi 40 HE (GC No. 47-075-30)
Baxi Platinum Combi 40 HE A Issue 4 (GC No. 47-075-34)
If you’re looking for a Baxi 428 Combi Expansion Vessel Assembly 7L 7661749 or any other different Baxi Expansion Vessel, follow the link provided.
Why Choose This Product?
This Baxi expansion vessel and PRV assembly provides stable pressure control and improves overall boiler safety. Moreover, it reduces stress on internal components during heating and hot water demand. Because the unit includes both the expansion vessel and pressure relief valve, it offers a complete and convenient replacement solution. In addition, choosing a brand new assembly ensures dependable performance, reduced risk of leaks, and long-term reliability for your heating system.
Delivery and Return
Orders placed before 1 PM are dispatched the same working day, and you can choose standard or next-day delivery at checkout. Additionally, you may return the item within 30 days if it remains unused and in its original condition. For safety and correct operation, always use a Gas Safe registered engineer to install this part.
Frequently Asked Questions
1.What does the Baxi Duo Tec 40HE A expansion vessel and PRV do?
The expansion vessel absorbs pressure changes during heating cycles, while the PRV releases excess pressure when needed. Together, they protect the boiler and ensure stable operation.
2.Is part number 5114692 correct for my boiler?
Yes. Part number 5114692 fits the Baxi Duo Tec 40HE A model. Therefore, it provides a direct and reliable replacement when pressure components fail.
3.Why does my boiler need a new expansion vessel?
Over time, an expansion vessel can lose pressure or fail. As a result, the boiler may show pressure faults or release water. Replacing it restores correct pressure control.
4.Does this product include a pressure relief valve?
Yes. This assembly includes both the 10 litre expansion vessel and the pressure relief valve, which makes installation simpler and more efficient.
5.Is this expansion vessel brand new or refurbished?
This unit is brand new. Consequently, it offers long service life and dependable performance from the moment of installation.












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