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this specific model is calibrated exclusively for natural gas
What is the maximum fluid temperature for the ZONE220S-50
Precise Thermal Sensing: Designed specifically for 7/8" copper discharge piping to ensure accurate temperature transfer
ensuring exact physical and thermal compatibility
Laars Heating Systems A2123420 Pump Bearing Assembly R-407C this specific model is calibratedThe Laars A2123420 Pump Bearing Assembly is a critical replacement component designed for the wet end of circulating pumps used in high efficiency Laars boiler systems and Pennant water heaters. This bearing assembly is engineered to restore hydraulic performance and mechanical integrity to the pump, preventing internal leaks and excessive vibration. Featuring a precision machined shaft and high grade mechanical seals, the A2123420 ensures proper