You should replace your toilet’s fill valve every four to five years. There should be about 1/2-in. of slack. No, you should turn off the water before replacing a toilet fill valve. To do this, rotate ...

In refrigeration and air conditioning applications, there are two main types of expansion valves: thermostatic expansion valves (TXVs), and automatic, or constant-pressure, expansion valves (AXVs).

Second of Two Parts When using electric expansion valves (EEVs), you must first determine the manner in which superheat will be sensed. There are two basic schemes for sensing superheat: 1.True ...