yep it's SA Water. Had similar problems in areas like Aldgate a while ago. The group hassled SA Water for ages about it but nothing was done, they wanted CFS people to go around and check them all and report individual ones that needed work! A story appeared in the local paper (the courier) about it, you can imagine how it went: your house is on fire but CFS can't find a hydrant or get water out of it etc etc. SA Water went around and fixed them all up after that, and did a good job of it (pity they didn't do that in the first place but anyway).