The Rinnai 105000250 Water Heater External Pump Harness is a premium accessory designed to optimize the performance of Rinnai water heaters. It connects an external pump to the water heater, enhancing the efficiency of hot water circulation in your system. This harness is made with durable materials for reliable, long-term use. It ensures compatibility with specific Rinnai models, off... https://www.hnkparts.com/105000250-rennai-external-pump-harness