Description

Expansion Vessel Assembly Baxi 636 Combi Boiler 7L 7683801

The Baxi 636 Combi Expansion Vessel Assembly 7L helps your heating system maintain stable pressure during operation. Moreover, this brand-new vessel absorbs pressure changes as the water expands and contracts, which improves system safety and reliability. In addition, the part number 7683801 ensures an accurate fit for the Baxi 636 Combi, so the replacement process becomes smooth and straightforward for engineers.

Compatible Boilers

Baxi Combi Series

• 624 Combi (GC No. 47-077-28)

• 630 Combi (GC No. 47-077-29)

• 636 Combi (GC No. 47-077-30)

• 825 Combi (GC No. 47-077-38)

• 830 Combi (GC No. 47-077-39)

• 836 Combi (GC No. 47-077-40)

Baxi System Series

• 818 System (GC No. 41-470-73)

• 824 System (GC No. 41-470-74)

If you’re looking for a Baxi Combi 80 Maxflue Expansion Vessel + PRV 8L 248024 or any other different Baxi Expansion Vessel, follow the link provided.

Why Choose This Product?

This expansion vessel provides stable pressure regulation, which improves boiler efficiency and protects essential parts from pressure-related damage. Additionally, it reduces the risk of leaks and unexpected shutdowns by absorbing pressure increases as water expands. This brand-new vessel supports reliable heating performance and offers a simple solution for engineers who need a direct replacement. Furthermore, the durable build ensures long service life, making it a strong choice for long-term boiler maintenance.

Delivery and Return

Orders placed before 1 PM leave the warehouse the same working day, ensuring quick delivery when your boiler needs urgent attention. You can select standard or next-day courier options at checkout for added convenience. Returns are accepted within 30 days if the item remains unused and in its original condition. For safe and correct installation, always use a Gas Safe registered engineer.

Frequently Asked Questions (FAQs)

1. What does the Baxi Expansion Vessel Assembly 7L do?
The expansion vessel absorbs pressure changes inside your heating system, and therefore it keeps system pressure stable during heating cycles. This stability protects key components and ensures smoother boiler performance.

2. Which boilers use the Baxi 7683801 expansion vessel?
This expansion vessel fits several Baxi Combi and System models, including 624, 630, 636, 825, 830, 836 Combi, and 818 and 824 System boilers. You can confirm compatibility by matching your boiler’s GC number with the list in the product description.

3. Can this part fix pressure loss or frequent lockouts?
Yes. Faulty expansion vessels often cause repeated pressure drops, noisy operation, or lockouts. Replacing the vessel helps stabilise pressure and restores normal boiler behaviour.

4. Is this expansion vessel brand new or refurbished?
This part is brand new, and therefore it offers maximum reliability and long service life straight out of the box.

5. Do I need a professional engineer to install this expansion vessel?
Yes. A Gas Safe registered engineer should always install expansion vessels because safe installation requires correct pressure charging and system testing.