1. for repairing heating systems in dormitories, commercial buildings such as offices and hotels, and service centers that guarantee uninterrupted hot water supply. 2. Made with quality materials for durability and reliability, ensuring a longer lifespan for your heating system. 3. Simplify the process and save time and costs by providing all parts, seals, sensors, and wires in one convenient kit. Get your heating system running smoothly again in no time. 4. Restore your D5WZ and D5WS heating systems with this comprehensive kit to quickly and efficiently resolve any issues. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin