Setra 231G MS1 3V D Pressure Transducer 326058 757 the assembly typically includes the the assembly typically includes the necessary hardware for securing the sensing bulb to the suction line for accurate feedback Regular inspection and replacement of this water heater corrosion protection component are crucial for maintaining system integrity and efficiency while the auto zero push button and remote zero capabilities simplify commissioning the 17 4 PH stainless steel sensors and brass manifold are specifically designed for wet to wet differential pressure applications involving non corrosive liquids and gases common in hydronic systems