Biasi BI1431100 Compatible Actuator Motor- Activ a, Advance, Inovia, Riva Biasi BI1431100 Compatible Actuator – Activ a, Advance, Inovia, Riva Keep your heating running smoothly with this compatible replacement boiler part. Part number: BI1431100. Designed for dependable performance, it’s ideal for boiler repairs, servicing and maintenance. Why buy this part: ✓ Reliable compatible alternative ✓ Helps restore efficient boiler operation ✓ Suitable for professional repair & maintenance ⚠️ We recommend that all parts are fitted by a fully qualified gas safe certified technician.