tq60, is for webasto heating system, it uses diesel fuel and very little electricity to heat up the engine and entire coolant system on diesel vehicles, and this pump will be a permanent part of the cooling system which means all day when the car is running is at 90 degree centigrade, and i don't want to have overheating issues because of failure at the pump, if i use an household pump and inverter it will drain my battery, so no matter how hot the engine is ill want be able to turn it over.