Many electronic TRV heads come with a selection of adaptors to fit many heads, but stage one is measure most say what threads they can be used with.
Mechanical heads often needs to be same make and type as orignal, only the electronic auto configure for pin travel. But with electronic even my cheap eQ-3 which cost me £15 each in 2019 auto adjust and show error code it travel too much or too little.
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by Doughnutman » Mon Nov 14, 2022 1:21 pm 
