Because exact temperatures are poorly marked on the thermostats of hot-water heaters, measurement of the water temperature is best done at the tap with a meat or candy thermometer.
(exact temperatures; are poorly marked; L:on the thermostats of hot-water heaters) (measurement of the water temperature; is best done; L:at the tap with a meat or candy thermometer)
exact temperatures measurement of the water temperature
are poorly marked is best done
L:on the thermostats of hot-water heaters
L:at the tap with a meat or candy thermometer