Hayward UHXWPAK19300 Adapter To Replace Pentair MasterTemp w H Series Heater Pressure Gauges Use to replace part number 000 BTU Natural Gas Use to replace part number A1421 For assistance with diagnosis or installation ✅ Key Features: 🔧 Direct Adapter – Allows seamless replacement of Pentair MasterTemp & Sta Rite Max E Therm heaters with Hayward Universal H Series heaters 🛠️ Reduces Plumbing Work – Designed to match up water connections quickly and accurately 💪 Heavy Duty Construction – Built with durable materials for long lasting performance 📦 Complete Kit – Includes all necessary fittings and hardware for installation 📋 Compatibility: • Compatible with Hayward Universal H Series pool & spa heaters (models H150FD H400FD) • Designed for Pentair MasterTemp and Sta Rite Max E Therm heater plumbing replacement 📝 Installation Notes: • Professional installation is recommended for best results and to ensure proper heater performance • Follow all manufacturer instructions included with the kit • For heater model and site specific requirements