Description

Baxi 720777601 Air Vent Valve | AAV for Ecoblue, 600, 800 & Duo Tec

The Baxi automatic air vent valve 720777601 helps remove trapped air from the heating system, so your boiler can operate efficiently and maintain proper circulation. However, if air builds up inside the system, it can cause noisy operation, reduced heating performance, or circulation problems. Therefore, replacing a faulty air vent valve helps restore smooth system operation and supports reliable boiler performance.

Compatible Boilers

This part is compatible with selected Baxi boiler models.

Baxi 100, 200, 400, 600 & 800 Combi Series

• 124 Combi — GC No. 47-077-25

• 128 Combi — GC No. 47-077-26

• 224 Combi — GC No. 47-077-21

• 228 Combi — GC No. 47-077-22

• 424 Combi — GC No. 47-077-23

• 428 Combi — GC No. 47-077-24

• 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 800 System Series

• 818 System — GC No. 41-470-73

• 824 System — GC No. 41-470-74

Baxi Ecoblue & Ecoblue Advance Series

• Ecoblue 24 Combi — GC No. 47-075-81

• Ecoblue 28 Combi — GC No. 47-075-82

• Ecoblue 33 Combi — GC No. 47-075-83

• Ecoblue Advance Combi 24 — GC No. 47-075-87

• Ecoblue Advance Combi 28 — GC No. 47-075-88

• Ecoblue Advance Combi 33 — GC No. 47-075-89

• Ecoblue Advance Combi 40 — GC No. 47-075-90

• 18 System Ecoblue ERP — GC No. 41-470-25

• 24 Combi Ecoblue ERP — GC No. 47-077-11

• 24 System Ecoblue ERP — GC No. 41-470-26

• 28 Combi Ecoblue ERP — GC No. 47-077-12

• 33 Combi Ecoblue ERP — GC No. 47-077-13

Baxi Advance & Plus Combi ERP

• Advance Combi 24 ERP — GC No. 47-077-14

• Advance Combi 28 ERP — GC No. 47-077-15

• Advance Combi 33 ERP — GC No. 47-077-16

• Advance Combi 40 ERP — GC No. 47-077-17

• Plus Combi 24 / 24 ERP — GC No. 47-075-84 / 47-077-08

• Plus Combi 28 / 28 ERP — GC No. 47-075-85 / 47-077-09

• Plus Combi 33 / 33 ERP — GC No. 47-075-86 / 47-077-10

Baxi Duo Tec 2 GA & ErP Series

• Duo Tec 2 24 GA Range — GC No. 47-075-54

• Duo Tec 2 28 GA Range — GC No. 47-075-55

• Duo Tec 2 33 GA Range — GC No. 47-075-56

• Duo Tec 2 40 GA Range — GC No. 47-075-57

• Duo Tec 24 Combi ErP (AC/BC/CC/DC) — GC No. 47-075-96 (AC-DC)

• Duo Tec 28 Combi ErP (AC/BC/CC/DC) — GC No. 47-075-97 (AC-DC)

• Duo Tec 33 Combi ErP (AC/BC/CC/DC) — GC No. 47-075-99 (AC-DC)

• Duo Tec 40 Combi ErP (AC/BC/CC/DC) — GC No. 47-077-03 (AC-DC)

Baxi Platinum 2 & Neta-Tec GA Series

• Platinum 2 Combi 28 GA — GC No. 47-075-61

• Platinum 2 Combi 33 GA — GC No. 47-075-62

• Platinum 2 Combi 40 GA — GC No. 47-075-63

• Neta-Tec 24 / 28 / 33 GA — GC No. 47-075-51 / 52 / 53

• Neta-Tec Plus Combi 24 / 28 / 33 GA — GC No. 47-075-64 / 65 / 66

Baxi Megaflo 2 Compact GA Series

• Megaflo 2 System 12 Compact GA — GC No. 41-075-70

• Megaflo 2 System 15 Compact GA — GC No. 41-075-71

• Megaflo 2 System 18 Compact GA — GC No. 41-075-72

• Megaflo 2 System 24 Compact GA — GC No. 41-075-73

• Megaflo 2 System 28 Compact GA — GC No. 41-075-74

• Megaflo 2 System 32 Compact GA — GC No. 41-075-75

Baxi System Series (Generic & ErP)

• System 12 / 12 ERP — GC No. 47-077-95 / 41-470-23

• System 15 / 15 ERP — GC No. 47-077-96 / 41-470-24

• System 18 — GC No. 47-077-97

• System 24 — GC No. 47-077-98

• System 28 / 28 ERP — GC No. 47-077-99 / 41-470-27

• System 32 / 32 ERP — GC No. 41-470-01 / 41-470-28

• 15 System ERP (IN AC/BC/CC) — GC No. 41-470-18

• 18 System ERP (IN AC/BC/CC) — GC No. 41-470-19 / 17

• 24 System ERP (IN AC/BC/CC) — GC No. 41-470-20

• 28 System ERP (IN AC/BC/CC) — GC No. 41-470-21

• 32 System ERP (IN AC/BC/CC) — GC No. 41-470-22

Baxi Combi (Generic & ErP)

• 24 Combi — GC No. 47-075-67

• 28 Combi — GC No. 47-075-68

• 40 Combi — GC No. 47-075-70

• Combi 28 Compact — GC No. 47-075-72

• 24 Combi ERP (CC/DC/EC/IN AC/IN BC) — GC No. 47-077-04

• 28 Combi ERP (CC/DC/EC/IN AC/IN BC) — GC No. 47-077-05

• 33 Combi ERP (CC/DC/EC/IN AC/IN BC) — GC No. 47-077-06

• 40 Combi ERP (CC/DC/EC/IN AC/IN BC) — GC No. 47-077-07

Main Eco Compact & ErP Series

• Eco Compact 15 System — GC No. 41-467-30

• Eco Compact 18 System — GC No. 41-467-31

• Eco Compact 25 Combi — GC No. 47-467-14

• Eco Compact 30 Combi — GC No. 47-467-15

• 24 System ErP (AC/BC/CC/DC) — GC No. 41-467-28

• 25 Combi ERP (AC/BC/CC) — GC No. 47-467-12

Why Choose This Product?

This brand new Baxi air vent valve offers a reliable solution for removing trapped air and improving heating system performance. In addition, it helps reduce circulation issues and unwanted boiler noise while supporting efficient operation.

Delivery and Return

Order before 1 PM for same-day dispatch with standard and next-day delivery options available. Returns are accepted within 30 days if the part remains unused and in original packaging. Always use a qualified engineer for installation.

Frequently Asked Questions

1. What does an automatic air vent valve do?
The valve removes trapped air from the heating system automatically. As a result, it helps improve circulation and reduce system noise.

2. What happens if the air vent valve fails?
A faulty valve may allow air to remain inside the system, which can cause noisy operation, poor circulation, or reduced heating efficiency.

3. Is this part brand new?
Yes, this Baxi automatic air vent valve is supplied brand new. It is ready for direct replacement installation.

4. Why is removing trapped air important?
Trapped air can reduce heating performance and create cold spots within the system. Therefore, a working air vent valve helps maintain efficient boiler operation.

5. Who should install this part?
A qualified heating engineer should install the valve to ensure safe and correct fitting.