ENSURE YOUR INSTALLER READS THE ATTACHED PDF AND FOLLOWS - 

The most important things to remember are that they are never turned on in an empty tank and the power doesn’t go through the 12v stat.

MUST BE USED WITH THE DURITE RELAY - DURITE 70A 12V RELAY

Thermostat cuts out at 65 degrees.

1M cables, 240V, 12V, Trigger

300 watt 12 volt side

750 watt 240 volt side

NOTE - For horizontal Calorifiers, not vertical (The issue is that it will only heat its length, if its fitted in a very tall vertical tank at the top it would only heat the 11” of the top)