Baxi
Baxi O-Ring Seal 248021
Baxi O-ring seal 248021 for primary heat exchanger, measuring 17.86 mm x 2.62 mm.
At a glance
- Also known as N2253
Showing prices
£4.32
£3.60 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
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 O-ring seal 248021 is a sealing component for the primary heat exchanger on compatible Baxi boilers. It measures 17.86 mm x 2.62 mm and is used to maintain a fluid-tight joint at the primary heat exchanger. The part is listed against Baxi Duo Tec, Combi and Megaflo models.
Signs this part needs replacing
- Visible water weeping or staining around the primary heat exchanger joint.
- Dripping or pressure loss from the sealed connection.
- The O-ring is flattened, hardened, cracked or perished.
- Scale, corrosion or debris is present on the sealing face.
- Repeated need to top up system pressure.
Before you order
- Check the existing O-ring part number against 248021.
- Confirm the O-ring dimensions are 17.86 mm x 2.62 mm.
- Confirm the appliance model against the Fits list.
- Confirm the part is for the primary heat exchanger sealing point.
Compliance
| GC number | 343-586 |
|---|---|
| Alternative numbers | N2253 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI 224 COMBI 2 | 47-077-48 | 47-077-48 | — | — |
| BAXI 224 ErP COMBI | 47-077-21 | 47-077-21 | — | — |
| BAXI 224 LPG COMBI 2 | 47-077-50 | 47-077-50 | — | — |
| BAXI 228 COMBI 2 | 47-077-49 | 47-077-49 | — | — |
| BAXI 228 ErP COMBI | 47-077-22 | 47-077-22 | — | — |
| BAXI 424 COMBI 2 | 47-077-51 | 47-077-51 | — | — |
| BAXI 424 COMBI 2 LPG | 47-077-53 | 47-077-53 | — | — |
| BAXI 424 ERP COMBI 2.1 | 47-077-74 | 47-077-74 | — | — |
| BAXI 424 ErP COMBI | 47-077-23 | 47-077-23 | — | — |
| BAXI 424 LPG COMBI 2 | 47-077-53 | 47-077-53 | — | — |
Showing 10 of 312 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 — 224 COMBI 2 (GC 47-077-48), 224 LPG COMBI 2 (GC 47-077-50), 228 COMBI 2 (GC 47-077-49)
manualmanualBAXI appliance manual — 224 ErP COMBI (GC 47-077-21), 228 ErP COMBI (GC 47-077-22), 424 ErP COMBI (GC 47-077-23), 428 ErP COMBI (GC 47-077-24)
manualmanualBAXI appliance manual — 424 COMBI 2 (GC 47-077-51), 424 LPG COMBI 2 (GC 47-077-53), 430 COMBI 2 (GC 47-077-52), 430 LPG COMBI 2 (GC 47-077-54)
manualmanualBAXI appliance manual — AMPTEC S 12KW, AMPTEC S 14KW, AMPTEC S 18KW, AMPTEC S 4KW, AMPTEC S 6KW, AMPTEC S 8KW
manualmanualBAXI appliance manual — COMBI 105E (GC 47-075-08), COMBI 80E (GC 47-075-06)
manualmanualBAXI appliance manual — COMBI 105HE (GC 47-075-18)
manualmanualBAXI appliance manual — COMBI 80 ECO (GC 47-075-05)
manualmanualBAXI appliance manual — COMBI 80 MAXFLUE (GC 47-075-07)
manualmanualBAXI 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 2 COMBI 28 COMPACT (GC 47-075-72)
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 — ECOGEN 24 (GC 41-075-60)
manualmanualBAXI appliance manual — MEGAFLO 15 HE A SYSTEM (GC 41-075-55), MEGAFLO 18 HE A SYSTEM (GC 41-075-56), MEGAFLO 24 HE A SYSTEM BEFORE BTF 0932 (GC 41-075-57), MEGAFLO 24 HE A SYSTEM FROM SERIAL NO BTF 0932 (GC 41-075-57), MEGAFLO 28 HE A SYSTEM BEFORE CAB 1112 (GC 41-075-58), MEGAFLO 28 HE A SYSTEM FROM SERIAL NO CAB 1112 (GC 41-075-58), MEGAFLO 32 HE A SYSTEM (GC 41-075-59)
manualmanualBAXI appliance manual — MEGAFLO 15 HE SYSTEM (GC 41-075-52), MEGAFLO 18 HE SYSTEM (GC 41-075-53), MEGAFLO 24 HE SYSTEM (GC 41-075-47), MEGAFLO 28 HE SYSTEM (GC 41-075-57)
manualmanualBAXI appliance manual — MEGAFLO 18 HE A SYSTEM LPG (GC 41-075-61), MEGAFLO 28 HE A SYSTEM LPG BEFORE SERIAL No. FSR 1112 (GC 41-075-62), MEGAFLO 28 HE A SYSTEM LPG FROM SERIAL No. FSR 1112 (GC 41-075-62), MEGAFLO 32 HE A SYSTEM LPG (GC 41-075-59)
manualmanualBAXI appliance manual — MEGAFLO SYSTEM ErP 15 SERIAL No. ENDING AC (GC 41-470-18), MEGAFLO SYSTEM ErP 15 SERIAL No. ENDING BC (GC 41-470-18), MEGAFLO SYSTEM ErP 15 SERIAL No. ENDING CC (GC 41-470-18), MEGAFLO SYSTEM ErP 18 SERIAL No. ENDING AC (GC 41-470-19), MEGAFLO SYSTEM ErP 18 SERIAL No. ENDING BC (GC 41-470-19), MEGAFLO SYSTEM ErP 18 SERIAL No. ENDING CC (GC 41-470-19), MEGAFLO SYSTEM ErP 24 SERIAL No. ENDING AC (GC 41-470-20), MEGAFLO SYSTEM ErP 24 SERIAL No. ENDING BC (GC 41-470-20), MEGAFLO SYSTEM ErP 24 SERIAL No. ENDING CC (GC 41-470-20), MEGAFLO SYSTEM ErP 28 SERIAL No. ENDING AC (GC 41-470-21), MEGAFLO SYSTEM ErP 28 SERIAL No. ENDING BC (GC 41-470-21), MEGAFLO SYSTEM ErP 28 SERIAL No. ENDING CC (GC 41-470-21), MEGAFLO SYSTEM ErP 32 SERIAL No. ENDING AC (GC 41-470-22), MEGAFLO SYSTEM ErP 32 SERIAL No. ENDING BC (GC 41-470-22), MEGAFLO SYSTEM ErP 32 SERIAL No. ENDING CC (GC 41-470-22)
manualmanualBAXI appliance manual — NETA-TEC PLUS COMBI 24 GA (GC 47-075-64), NETA-TEC PLUS COMBI 28 GA (GC 47-075-65), NETA-TEC PLUS COMBI 33 GA (GC 47-075-66)
manualmanualBAXI appliance manual — PLATINUM + 40 COMBI (GC 47-077-41)
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 24 COMBI ErP SERIAL No. ENDING EC (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 28 COMBI ErP SERIAL No. ENDING EC (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 33 COMBI ErP SERIAL No. ENDING EC (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), PLATINUM 40 COMBI ErP SERIAL No. ENDING EC (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)
manualmanualBAXI appliance manual — SYSTEM 35/60 (GC 41-075-18), SYSTEM 60/100 (GC 41-075-19)
manualmanualBAXI appliance manual — SYSTEM IE 24 HE MEGAFLO LPG (GC 51-297-58), SYSTEM IE 28 HE MEGAFLO LPG (GC 51-297-59)
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