Halstead 3-WAY Compatible Actuator – Iheat 24C, 25C, 29C, 30C, 35C Halstead 3-WAY Compatible Actuator – Iheat Keep your heating running smoothly with this compatible replacement boiler part. Part number: 3-WAY. 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.