NOTE: When ordering a pressure transducer for a malfunctioning Grundfos Smartflo system such as, varying pressure, pump stops and starts all the time, pump wont shut off could also be a defective pressure tank. The only way to accurately check the pressure tank is to shut the system down, open a faucet to relieve existing water pressure, then remove the tank from system. If the tank is heavy or has water sloshing around in it, the diaphragm is defective and has allow water on the wrong side of it. Replace the tank and adjust air pressure to 70% of the selected pressure set on the control panel. Reinstall the new tank.
Remember that a pressure tank with a low volume of air (not just air pressure) can cause the pressure transducer to inaccurately read correct line pressure. We want people to be happy with their Grundfos Smartflo system without any unnecessary expenses.
CU301 Pressure Transducer 0-120 PSI, 1/2" NPTPart Number: 98393361
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