Yeah that's what i am looking to do mate that would be ideal. I couldn't fill the tank from my flat i'd have to go to my sisters after work and fill it then if i need to top up at work just do it from a customers outside tap with a hose. Was thinking i probably wouldn't go through more than 500 or 600 litre on a good day just going by what i've seen other people sayingFor one man 350 is plentyAnd if your DI is in van you can top up on job