Plumbing, Heating & Boiler Parts
Technical review: 2026-08-20
Boiler Central Heating Circulation Pumps
Source genuine Grundfos and Wilo modulating pump heads and complete circulation pump assemblies for domestic combi and system boilers.
Where to Find Your Model or Part Number
To guarantee 100% compatibility, check these standard locations for model badges, OEM stampings, and serial numbers:
- Specification plate on the front face of the pump motor head (e.g. Grundfos UPR 15-50, Wilo Para).
Frequently Replaced Components & Spares
High-Efficiency Modulating Pump Heads
PWM electronically commutated boiler pump heads
Standard Universal Heating Pumps
Grundfos UPS 15-50 / 15-60 130mm and 180mm port-to-port pumps
Common Symptoms & Fault Diagnostics
| Observed Symptom | Likely Root Cause | Recommended Action |
|---|---|---|
| Boiler overheats and locks out on fault code within 60 seconds of firing | Circulation pump seized, airlocked, or capacitor burned out preventing water flow | Inspect and replace faulty component. |
Compatibility Verification Checklist
Before ordering replacement components, verify these technical specifications to avoid returns:
Check whether pump connects via standard 3-pin mains plug or electronic PWM signal wire cable.
How to Photograph Your Part for AI Identification
- 1Photograph the front technical label on the pump motor casing.
Safety & Legal Compliance Notice
Isolate electrical supply and depressurize / drain boiler heating circuit before loosening pump head allen bolts.