Baxi
Baxi Hydro Block Right C24/28 720544301
Baxi 720544301 right-hand hydro block for Avanta Plus combi and Broag Remeha Avanta models, previously listed as S62774.
At a glance
- Part type: Diverter valves and hydraulics
- Also known as HYDRO-BLOCK---RIGHT-2428KW
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£264.00
£220.00 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Baxi 720544301 is a right-hand hydro block manufactured by Baxi for the Avanta family of combi boilers. It forms part of the hydraulic and manifold assembly, carrying and directing water through the appliance so that the heating circuit and domestic hot water circuit are supplied correctly. Because it sits at the centre of the water-side hydraulics, it works alongside the diverter valve components to keep changeover between heating and hot water reliable.
Signs this part needs replacing
- Domestic hot water runs cold or only lukewarm while the heating continues to work
- Hot water temperature swings between hot and cold during a draw-off
- The boiler fails to switch cleanly between central heating and hot water demand
- Water weeping or staining around the hydraulic block or its connections
- Fault codes or lockouts linked to the diverter valve or hydraulic assembly
Before you order
- Check the appliance GC number and model plate against the compatibility list before ordering, as the same boiler range uses more than one hydraulic block variant.
- Confirm the previous number S62774 matches the part currently fitted to the appliance.
- Inspect the seals and O-rings on the existing block and replace any that are hardened or damaged before refitting.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Hydraulic & Manifold Components |
|---|---|
| Length | 0.1mm |
| Width | 0.1mm |
| Depth | 0.1mm |
Compliance
| Manufacturer part number (MPN) | 720544301 |
|---|---|
| GC number | H39-175 |
| Barcode / EAN | 720544301 |
| Commodity code | 8403 90 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | HYDRO-BLOCK---RIGHT-2428KW, S62774 |
| Previous numbers | S62774 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI AVANTA PLUS COMBI 24C | 47-075-77 | 47-075-77 | — | — |
| BAXI AVANTA PLUS COMBI 28C | 47-075-78 | 47-075-78 | — | — |
| BROAG REMEHA AVANTA EXCLUSIVE 28C | 47-288-03 | 47-288-03 | — | — |
| BROAG REMEHA AVANTA PLUS COMBI 24C | 47-288-01 | 47-288-01 | — | — |
| BROAG REMEHA AVANTA PLUS COMBI 28C | 47-673-02 | 47-673-02 | — | — |
| BROAG REMEHA AVANTA PLUS ECO COMBI 28C | 47-288-02 | 47-288-02 | — | — |
| BROAG REMEHA REMEHA AVANTA PLUS 24C COMBI | — | — | — | |
| BROAG REMEHA REMEHA AVANTA PLUS 28C COMBI | — | — | — | |
| BROAG REMEHA REMEHA AVANTA PLUS 28C ECO COMBI | — | — | — |
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.
BAXI appliance manual — AVANTA PLUS COMBI 24C (GC 47-075-77), AVANTA PLUS COMBI 28C (GC 47-075-78)
manualmanualBROAG REMEHA appliance manual — AVANTA EXCLUSIVE 28C (GC 47-288-03)
manualmanualBROAG REMEHA appliance manual — AVANTA PLUS COMBI 24C (GC 47-288-01), AVANTA PLUS COMBI 28C (GC 47-673-02)
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