[Neil Williams]

I've done this for years even at my own house which is cleaned at least every 6 weeks and never seen any damage to the garden or shrubs.

I did do it once (damage a lawn) but that was by emptying a hot texatherm machine with it's acid rinse solution onto the grass.
As for HWE I'm not admitting on a public forum where that waste goes other than to say if it's ok for vehicle contaminants along with detergent to go down the............

[Steve Chapman]

I bet most chuck it on the road & then run like hell 

[Simon@arenaclean]

I saw a sneaky one on you tube, he had a standard porty drain valve with a pipe the exited through the floor within reach of the drivers seat. All he had to do was was open up on a clear road, bit naughty but clever.

[Carpet Dawg]

I bet most chuck it on the road & then run like hell 

Got the t-shirt 

[Matt Steele]

i was told on a course i attended last year that on a domestic job the waste water must go down the loo, pouring it down a street drain is subject to a 20 grand fine.
on a commercial job, technically it has to be disposed of as a bio hazard ie through a registered company. thankfully its not rigorously enforced