Perfect Compatibility Specifically engineered to fit Alpha and Ravenheat boiler models requiring the 3.013389 diaphragm repair kit, ensuring an exact fit and smooth operation. Restores Boiler Efficiency Replaces worn or damaged diaphragms in the diverter valve, helping to restore hot water and heating functions to optimal performance levels. Durable Material Crafted from high-quality, heat-resistant materials designed to withstand the demanding conditions of boiler operation, ensuring longevity and reliability. Prevents Common Issues Addresses issues such as no hot water, intermittent heating, or leaking valves, minimizing downtime and inconvenience. Cost-Effective Solution Provides an affordable alternative to replacing the entire diverter valve, making boiler repairs more economical. 12-Month Warranty: Backed by a full year of warranty, ensuring reliable and worry-free operation., Manufacturer: HTS