This is my new DIY webasto 5.2kw pure hot water system ready to go into my van after xmas. The pipework is as close and neat as i can get it for this one so as to keep as much heat in the circuit as possible to get the hottest temperature to the brush. This is the third one i have built and they work really well Temperatures of 65c I only use the Marine / Campervan webasto heaters as they have been designed to run continuosly and are different to the car preheaters that are only used to work for 50 / 60 minutes heating up the car