This seem strange:
water costs money
window cleaning traditionally costs money
window cleaning using waterfed poles costs money
so if it costs money to make water charge it to the job!
(after all a haulage company dosent say oh well fuel costs money we wont charge for it so we'll see if we can run on thin air!!! no they charge they build it into there costs)
so water meter costs need to be built into the costings,
sorry for being blunt but things cost money!!
rgds,
stuart
skypole systems