Is this 'special' water expensive?
Where can i get a hum pump from?
Can i use my Ford Sierra for the water to customer transfer?
sorry for the silly questions!
It's a hump up, not hum pump, that you need; just a typo

. If you get the hump up, you can produce special water on the job but you need to ask the customer about the water supply. It's best to ask the man of the house because women don't know and will be probably be washing up anyway.
Unload your hump up from the Sierra (I used to use a Cosworth, so they are up to the job), ask the bloke about his waterworks, because you want to get humping asap.