Baxi
Baxi 7223558 Potterton & Main 20 Plate DHW Heat Exchanger
Baxi 7223558 DHW plate heat exchanger with a 20-plate stack, fitted to Combi Instant, Duo Tec and Platinum gas combi boilers.
At a glance
- Part type: DHW plate heat exchanger
- Also known as 5039177790341, BAXI7223558, 43375470
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Showing prices
£84.00
£70.00 ex. VAT · VAT at 20%
In stock
Cut-off passed — dispatches next 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 Baxi 7223558 is a domestic hot water (DHW) plate heat exchanger with a 20-plate stack, manufactured by Baxi. It sits on the DHW side of a combi boiler and transfers heat from the primary circuit into the mains cold water supply, giving instant hot water at the tap. It is used across the Baxi Combi Instant, Duo Tec and Platinum appliance families.
Signs this part needs replacing
- Hot water runs cold, or cycles between hot and cold at the tap
- Noticeably reduced hot water flow rate
- Water weeping or dripping from the plate stack or its connections
- Scale or debris blocking the waterways, reducing heat transfer
- DHW temperature faults or lockouts shown on the boiler display
Before you order
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
- Check the part number and plate count against the exchanger already fitted.
- Confirm the appliance model and, where available, the GC number from the data badge.
- Check the appliance parts list for the sealing washers or gaskets needed when refitting the exchanger.
Mechanical
| Part type | DHW plate heat exchanger |
|---|
Compliance
| Manufacturer part number (MPN) | 7223558 |
|---|---|
| GC number | E68-180 |
| Commodity code | 8419 50 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 5039177790341, BAXI7223558, 43375470 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI COMBI INSTANT 105E | 47-075-09 | 47-075-09 | — | — |
| BAXI COMBI INSTANT 105HE | 47-075-19 | 47-075-19 | — | — |
| BAXI COMBI INSTANT 80E | 47-075-13 | 47-075-13 | — | — |
| BAXI COMBI INSTANT 80HE | 47-075-17 | 47-075-17 | — | — |
| BAXI DUO-TEC 24 COMBI ErP FROM SERIAL No. PSR16 - ENDING BC | 47-075-96 | 47-075-96 | — | — |
| BAXI DUO-TEC 24 COMBI ErP SERIAL No. ENDING AC | 47-075-96 | 47-075-96 | — | — |
| BAXI DUO-TEC 24 HE | 47-075-23 | 47-075-23 | — | — |
| BAXI DUO-TEC 28 COMBI ErP FROM SERIAL No. PSS16 - ENDING BC | 47-075-97 | 47-075-97 | — | — |
| BAXI DUO-TEC 28 COMBI ErP SERIAL No. ENDING AC | 47-075-97 | 47-075-97 | — | — |
| BAXI DUO-TEC 28 HE | 47-075-25 | 47-075-25 | — | — |
Showing 10 of 116 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 — COMBI INSTANT 105E (GC 47-075-09), COMBI INSTANT 80E (GC 47-075-13)
manualmanualBAXI appliance manual — COMBI INSTANT 105HE (GC 47-075-19), COMBI INSTANT 80HE (GC 47-075-17)
manualmanualBAXI appliance manual — DUO-TEC 24 COMBI ErP FROM SERIAL No. PSR16 - ENDING BC (GC 47-075-96), DUO-TEC 28 COMBI ErP FROM SERIAL No. PSS16 - ENDING BC (GC 47-075-97), DUO-TEC 28 LPG COMBI ErP FROM SERIAL No. PSW16 - ENDING BC (GC 47-075-98), DUO-TEC 33 COMBI ErP FROM SERIAL No. PSX16 - ENDING BC (GC 47-075-99), DUO-TEC 40 COMBI ErP FROM SERIAL No. PST16 - ENDING BC (GC 47-077-03)
manualmanualBAXI appliance manual — DUO-TEC 24 COMBI ErP SERIAL No. ENDING AC (GC 47-075-96), DUO-TEC 28 COMBI ErP SERIAL No. ENDING AC (GC 47-075-97), DUO-TEC 28 LPG COMBI ErP SERIAL No. ENDING AC (GC 47-075-98), DUO-TEC 33 COMBI ErP SERIAL No. ENDING AC (GC 47-075-99), DUO-TEC 40 COMBI ErP SERIAL No. ENDING AC (GC 47-077-03)
manualmanualBAXI appliance manual — DUO-TEC 24 HE (GC 47-075-23), DUO-TEC 28 HE (GC 47-075-25), DUO-TEC 33 HE (GC 47-075-24), DUO-TEC 40 HE (GC 47-075-26)
manualmanualBAXI appliance manual — DUO-TEC 28 HE LPG (GC 47-075-39)
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 24 COMBI ErP SERIAL No. ENDING AC (GC 47-077-04), PLATINUM 24 COMBI ErP SERIAL No. ENDING BC (GC 47-077-04), PLATINUM 24 COMBI ErP SERIAL No. ENDING CC (GC 47-077-04), PLATINUM 24 COMBI ErP SERIAL No. ENDING DC (GC 47-077-04), PLATINUM 28 COMBI ErP SERIAL No. ENDING AC (GC 47-077-05), PLATINUM 28 COMBI ErP SERIAL No. ENDING BC (GC 47-077-05), PLATINUM 28 COMBI ErP SERIAL No. ENDING CC (GC 47-077-05), PLATINUM 28 COMBI ErP SERIAL No. ENDING DC (GC 47-077-05), PLATINUM 33 COMBI ErP SERIAL No. ENDING AC (GC 47-077-06), PLATINUM 33 COMBI ErP SERIAL No. ENDING BC (GC 47-077-06), PLATINUM 33 COMBI ErP SERIAL No. ENDING CC (GC 47-077-06), PLATINUM 33 COMBI ErP SERIAL No. ENDING DC (GC 47-077-06), PLATINUM 40 COMBI ErP SERIAL No. ENDING AC (GC 47-077-07), PLATINUM 40 COMBI ErP SERIAL No. ENDING BC (GC 47-077-07), PLATINUM 40 COMBI ErP SERIAL No. ENDING CC (GC 47-077-07), PLATINUM 40 COMBI ErP SERIAL No. ENDING DC (GC 47-077-07)
manualmanualBAXI appliance manual — PLATINUM 24HE COMBI (GC 47-075-20), PLATINUM 28HE COMBI (GC 47-075-21), PLATINUM 33HE COMBI (GC 47-075-29), 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 24 HE A - AFTER SERIAL No. BMY 0815 (GC 47-075-31), PLATINUM COMBI 28 HE A - AFTER SERIAL No. BNC 0932 (GC 47-075-32), PLATINUM COMBI 33 HE A - AFTER SERIAL No. BNE1112 (GC 47-075-33), PLATINUM COMBI 40 HE A (GC 47-075-34)
manualmanualBAXI appliance manual — PLATINUM COMBI 24 HE A - BEFORE SERIAL No. BMY 0815 (GC 47-075-31), PLATINUM COMBI 28 HE A - BEFORE SERIAL No. BNC 0932 (GC 47-075-32), PLATINUM COMBI 33 HE A - BEFORE SERIAL No. BNE1112 (GC 47-075-33)
manualmanualPOTTERTON appliance manual — GOLD COMBI 28 HE (GC 47-590-06), GOLD COMBI 33 HE (GC 47-590-19)
manualmanualPOTTERTON appliance manual — GOLD COMBI ErP 24 - SERIAL No. ENDING AC (GC 47-393-43), GOLD COMBI ErP 24 - SERIAL No. ENDING BC (GC 47-393-43), GOLD COMBI ErP 24 - SERIAL No. ENDING DC (GC 47-393-43), GOLD COMBI ErP 28 - SERIAL No. ENDING AC (GC 47-393-44), GOLD COMBI ErP 28 - SERIAL No. ENDING BC (GC 47-393-44), GOLD COMBI ErP 28 - SERIAL No. ENDING DC (GC 47-393-44), GOLD COMBI ErP 28 LPG - SERIAL No. ENDING AC (GC 47-393-45), GOLD COMBI ErP 28 LPG - SERIAL No. ENDING BC (GC 47-393-45), GOLD COMBI ErP 28 LPG - SERIAL No. ENDING DC (GC 47-393-45), GOLD COMBI ErP 33 - SERIAL No. ENDING AC (GC 47-393-46), GOLD COMBI ErP 33 - SERIAL No. ENDING BC (GC 47-393-46), GOLD COMBI ErP 33 - SERIAL No. ENDING DC (GC 47-393-46)
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)
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 — PERFORMA 24I HE (GC 47-393-12)
manualmanualPOTTERTON appliance manual — PERFORMA 28I (GC 47-393-08)
manualmanualPOTTERTON appliance manual — PROMAX COMBI Erp 24 - SERIAL No. ENDING AC (GC 47-393-47), PROMAX COMBI Erp 24 - SERIAL No. ENDING BC & CC (GC 47-393-47), PROMAX COMBI Erp 24 - SERIAL No. ENDING DC (GC 47-393-47), PROMAX COMBI Erp 28 - SERIAL No. ENDING AC (GC 47-393-48), PROMAX COMBI Erp 28 - SERIAL No. ENDING BC & CC (GC 47-393-48), PROMAX COMBI Erp 28 - SERIAL No. ENDING DC (GC 47-393-48), PROMAX COMBI Erp 33 - SERIAL No. ENDING AC (GC 47-393-49), PROMAX COMBI Erp 33 - SERIAL No. ENDING BC & CC (GC 47-393-49), PROMAX COMBI Erp 33 - SERIAL No. ENDING DC (GC 47-393-49), PROMAX PLUS A SYSTEM 24 HE (GC 47-393-47)
manualmanualPOTTERTON appliance manual — PROMAX COMBI PLUS 24 HE (GC 47-393-17), PROMAX COMBI PLUS 28 HE (GC 47-590-04), PROMAX COMBI PLUS 33 HE (GC 47-590-03)
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 24 HE LPG (GC 47-393-24)
manualmanualPOTTERTON appliance manual — TITANIUM 24 (GC 47-393-39), TITANIUM 28 (GC 47-393-40), TITANIUM 33 (GC 47-393-41), TITANIUM 40 (GC 47-393-42)
manualmanualPOTTERTON appliance manual — TITANIUM COMBI 24 ErP - SERIAL No. ENDING AC (GC 47-393-50), TITANIUM COMBI 24 ErP - SERIAL No. ENDING BC & CC (GC 47-393-50), TITANIUM COMBI 24 ErP - SERIAL No. ENDING DC (GC 47-393-50), TITANIUM COMBI 28 ErP - SERIAL No. ENDING AC (GC 47-393-51), TITANIUM COMBI 28 ErP - SERIAL No. ENDING BC & CC (GC 47-393-51), TITANIUM COMBI 28 ErP - SERIAL No. ENDING DC (GC 47-393-51), TITANIUM COMBI 33 ErP - SERIAL No. ENDING AC (GC 47-393-52), TITANIUM COMBI 33 ErP - SERIAL No. ENDING BC & CC (GC 47-393-52), TITANIUM COMBI 33 ErP - SERIAL No. ENDING DC (GC 47-393-52), TITANIUM COMBI 40 ErP - SERIAL No. ENDING AC (GC 47-393-53), TITANIUM COMBI 40 ErP - SERIAL No. ENDING BC & CC (GC 47-393-53), TITANIUM COMBI 40 ErP - SERIAL No. ENDING DC (GC 47-393-53)
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