How to Replace a Stuart Turner Techflo QT 3 bar (UK)
Fit a Stuart Turner Techflo QT 3 bar pump on a UK heating or boosted DHW system. Face-to-face, orientation, bleed sequence.
The pump
Stuart Turner Techflo QT 3 bar — confirm 130 mm or 180 mm face-to-face, and whether your system is single-phase 230 V or low-voltage.
Isolate
Turn off the boiler and 230 V spur. Close both pump gate valves. Have a shallow tray ready — approx 500 mL will spill.
Fit
Undo the pump unions, transfer the power lead terminating L/N/E in the correct order into the Stuart Turner Techflo QT 3 bar terminal box. Orient the pump head so the shaft is horizontal. Open valves, bleed via the centre screw until water flows clear.
Set the Stuart Turner Techflo QT 3 bar to the correct speed or auto-adapt curve per the OEM installer sheet.
Frequently asked questions
- Speed setting for Techflo QT 3 bar?
- Most modern UK homes: setting II on a fixed-speed Stuart Turner; auto-adapt on Stuart Turner A-rated pumps.
- Do I need to power-flush after fitting?
- Best practice — but at minimum add 500 mL Fernox F1 or Sentinel X100 and fit a magnetic filter.
- Is the Stuart Turner Techflo QT 3 bar ErP compliant?
- Yes — all current UK-sold A-rated pumps meet the ErP <180 W directive.
Browse electrical spares — 2,105 live parts.
View Electrical Spares