Potterton
Potterton 3-Way Mixing Valve VXP459.20-4
Three-way mixing valve with a G1 connection, part VXP459.20-4, for Potterton Commercial Sirius SAT boilers.
£97.20
£81.00 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 Potterton 3-Way Mixing Valve G1 VXP459.20-4 is a three-port mixing valve used on Potterton Commercial boilers to control the flow of water between the heating circuit and the hot water side of the appliance. It is listed in the Potterton Commercial spares range under diverter valves. The valve has a G1 connection.
Signs this part needs replacing
- Heating runs when only hot water is demanded, or hot water runs when only heating is demanded
- The valve does not move through its full travel, leaving the appliance stuck in one mode
- Radiators or the hot water cylinder stay cold despite a demand at the controls
- Water weeping from the valve body or spindle
- The valve head operates but the valve does not change position
Before you order
- Confirm the existing valve part number matches VXP459.20-4
- Check the appliance model against the fit list above
- Verify the connection size is G1 before fitting
- Check the valve body and head operation to confirm the valve itself is at fault
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT R2Z | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RA | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RA2Z | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RS2Z | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RSP | — | — | — |
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.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.