Potterton
Potterton Mixer C/W By-Pass Valve 34mm (FS90) 5142386
Potterton mixer with by-pass valve, 34 mm, part 5142386, for Potterton Commercial Sirius 2 and Sirius 3 boilers.
£115.20
£96.00 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 mixer with by-pass valve, part 5142386, is a 34 mm mixer assembly with an integrated by-pass valve. It is used on Potterton Commercial boiler appliances, where it blends flow and provides a by-pass path within the water circuit. The assembly is supplied as a complete mixer with bi-valve.
Signs this part needs replacing
- Hot water temperature at the outlet fluctuates or cannot be held steady
- Poor response when adjusting the mixer, with little change at the tap or outlet
- Water weeping from the valve body, spindle or unions
- Scale or debris in the assembly causing stiff operation or restricted flow
- Boiler cycling, noise or unstable flow where the by-pass is no longer regulating correctly
Before you order
- Confirm the appliance model against the fit list above, noting the Sirius 2 and Sirius 3 variants
- Check the 34 mm size against the mixer currently fitted before removal
- For WH90 and WH110 appliances, establish whether the unit is pre- or post-April 2016
- Quote the part number 5142386 when checking the order
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS110 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS90 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 WH110 (FROM APRIL 2016) | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 WH90 (FROM APRIL 2016) | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS90 | — | — | — |
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.