Baxi
Baxi Automatic Air Vent 5122330
Automatic air vent, part 5122330, for Baxi Duo-Tec and Potterton Gold, Promax and Heatmax boilers.
At a glance
- Also known as 1121970, N2139-A
Showing prices
£52.32
£43.60 ex. VAT · VAT at 20%
Available to order · 1 working day
Available to order · 1 working day
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The automatic air vent is a Baxi component, part number 5122330, used across Baxi Duo-Tec and Potterton Gold, Promax and Heatmax boiler ranges. It continuously releases trapped air from the heating circuit, protecting the pump, heat exchanger and radiators from airlock and corrosion. It is a serviceable item that is replaced when the vent no longer seals or clears air from the system.
Signs this part needs replacing
- Water weeping or dripping from the vent body or cap
- Persistent gurgling or air noise in the boiler after the system has been bled
- Radiators that need frequent bleeding, or cold spots at the top of radiators
- System pressure that will not hold or falls repeatedly
- Visible scale or corrosion around the vent assembly
Before you order
- Confirm the boiler model against the fitment list above
- Where a serial number prefix is listed, check the boiler serial number to confirm which variant applies
- Check the part number on the existing vent matches 5122330
- Confirm the boiler has been isolated, drained and depressurised before removal
Mechanical
| Part type | AUTOMATIC AIR VENTS |
|---|
Compliance
| Manufacturer part number (MPN) | 5122330 |
|---|---|
| GC number | H43-945 |
| Barcode / EAN | 5039177691426 |
| Alternative numbers | 1121970, N2139-A |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI DUO-TEC 40 HE | 47-075-26 | 47-075-26 | — | — |
| BAXI DUO-TEC COMBI 24 HE A (AFTER SERIAL No. BTG 0815) | 47-075-35 | 47-075-35 | — | — |
| BAXI DUO-TEC COMBI 24 HE A (BEFORE SERIAL No. BTG 0815) | 47-075-35 | 47-075-35 | — | — |
| BAXI DUO-TEC COMBI 28 HE A (AFTER SERIAL No. CAC 0929) | 47-075-36 | 47-075-36 | — | — |
| BAXI DUO-TEC COMBI 28 HE A (BEFORE SERIAL No. CAC 0929) | 47-075-36 | 47-075-36 | — | — |
| BAXI DUO-TEC COMBI 33 HE A (AFTER SERIAL No. BTH 1112) | 47-075-37 | 47-075-37 | — | — |
| BAXI DUO-TEC COMBI 33 HE A (BEFORE SERIAL No. BTH 1112) | 47-075-37 | 47-075-37 | — | — |
| BAXI DUO-TEC COMBI 40 HE A | 47-075-38 | 47-075-38 | — | — |
| BAXI PLATINUM 24HE COMBI | 47-075-20 | 47-075-20 | — | — |
| BAXI PLATINUM 28HE COMBI | 47-075-21 | 47-075-21 | — | — |
Showing 10 of 52 compatible appliances.
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
manual
BAXI appliance manual — DUO-TEC 40 HE (GC 47-075-26)
manualmanualBAXI appliance manual — DUO-TEC COMBI 24 HE A (AFTER SERIAL No. BTG 0815) (GC 47-075-35), DUO-TEC COMBI 24 HE A (BEFORE SERIAL No. BTG 0815) (GC 47-075-35), DUO-TEC COMBI 28 HE A (AFTER SERIAL No. CAC 0929) (GC 47-075-36), DUO-TEC COMBI 28 HE A (BEFORE SERIAL No. CAC 0929) (GC 47-075-36), DUO-TEC COMBI 33 HE A (AFTER SERIAL No. BTH 1112) (GC 47-075-37), DUO-TEC COMBI 33 HE A (BEFORE SERIAL No. BTH 1112) (GC 47-075-37)
manualmanualBAXI appliance manual — DUO-TEC COMBI 40 HE A (GC 47-075-38)
manualmanualBAXI appliance manual — PLATINUM 24HE COMBI (GC 47-075-20), PLATINUM 28HE COMBI (GC 47-075-21), PLATINUM 33HE COMBI (GC 47-075-22), PLATINUM 40HE COMBI (GC 47-075-30), PLATINUM COMBI 24HE (GC 47-075-27), PLATINUM COMBI 28HE (GC 47-075-28)
manualmanualBAXI appliance manual — PLATINUM COMBI 40 HE A (GC 47-075-34)
manualmanualPOTTERTON appliance manual — GOLD COMBI HE A 24 - AFTER SERIAL No. BMX 0815 AND AFTER GNH 0815 (GC 47-393-18), GOLD COMBI HE A 28 - AFTER SERIAL No. BNF 0932 AND AFTER GNK 0932 (GC 47-393-19), GOLD COMBI HE A 33 - AFTER SERIAL No. GNL1112 (GC 47-393-20)
manualmanualPOTTERTON appliance manual — GOLD COMBI HE A 24 - BEFORE SERIAL No. BMX 0815 AND GNH 0815 (GC 47-393-18), GOLD COMBI HE A 28 - BEFORE SERIAL No. BNF 0932 AND GNK 0932 (GC 47-393-19), GOLD COMBI HE A 33 - BEFORE SERIAL No. GNL 1112 (GC 47-393-20), GOLD SYSTEM HE A 28 - AFTER SERIAL No. HSA 1112 (GC 41-592-17), GOLD SYSTEM HE A 28 - BEFORE SERIAL No. HSA 1112 (GC 41-592-17)
manualmanualPOTTERTON appliance manual — HEATMAX COMBI 24 HE (GC 47-393-27), HEATMAX COMBI 28 HE (GC 47-393-28), HEATMAX COMBI 33 HE - AFTER SERIAL No. FMN 1112 (GC 47-393-29), HEATMAX COMBI 33 HE - BEFORE SERIAL No. FMN 1112 (GC 47-393-29)
manualmanualPOTTERTON appliance manual — PROMAX COMBI PLUS 24 HE A (GC 47-393-21), PROMAX COMBI PLUS 28 HE A (AFTER SERIAL NO. AWA 0919) (GC 47-393-22), PROMAX COMBI PLUS 28 HE A (BEFORE SERIAL NO. AWA 0919) (GC 47-393-22), PROMAX COMBI PLUS 33 HE A (AFTER SERIAL NO. ATY 1112) (GC 47-393-23), PROMAX COMBI PLUS 33 HE A (BEFORE SERIAL NO. ATY 1112) (GC 47-393-23)
manualmanualPOTTERTON appliance manual — PROMAX COMBI PLUS 28 HE (GC 47-590-04), PROMAX COMBI PLUS 33 HE (GC 47-590-03)
manualmanualPOTTERTON appliance manual — PROMAX PLUS A SYSTEM 12 HE (GC 41-591-99), PROMAX PLUS A SYSTEM 15 HE (GC 41-592-01), PROMAX PLUS A SYSTEM 18 HE (GC 41-592-02), PROMAX PLUS A SYSTEM 24 HE (AFTER SERIAL NO. AWD 0932) (GC 41-592-03), PROMAX PLUS A SYSTEM 24 HE (BEFORE SERIAL NO. AWD 0932) (GC 41-592-03), PROMAX PLUS A SYSTEM 32 HE (GC 41-592-04)
manualmanualPOTTERTON appliance manual — PROMAX PLUS SYSTEM 12 HE (GC 41-591-90), PROMAX PLUS SYSTEM 15 HE (GC 41-591-91), PROMAX PLUS SYSTEM 18 HE (GC 41-591-92), PROMAX PLUS SYSTEM 32 HE (GC 41-591-93)
manualmanualPOTTERTON appliance manual — STATESMAN FLOWSURE L, STATESMAN FLOWSURE L PLUS, STATESMAN SYSTEM L
manualmanualPOTTERTON appliance manual — STATESMAN FLOWSURE, STATESMAN SYSTEM
manualNo technical questions yet for this part.
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