We had a recent annual inspection for an existing tenant (ie. the unit has been inspected several times in the past) and there were a few issues which we resolved quickly. One issue noted by the inspector was there was no drain pipe on the pressure relief vale on the small hot water tank under the kitchen sink. When we corrected the other issues we looked at the HW tank and the pipe was there; it just went up over the tank and into the drainage pipes behind the tank, instead of down the side of the tank which is more common. The catch here is that you actually have to bend over to see it.
Then the re-inspection date comes and we get another fail because the drain pipe on the pressure relief valve on the HW tank is apparently missing. Yes, same inspector. Apparently can't be bothered to crouch down and look at it. 2 failed inspections means the tenant loses their voucher, so after several emails, submitted photos, unanswered phone calls, and a lot of pestering, they agree to do another inspection and low and behold, the pipe is there! And it's been there for at least 10 years. I even had to fight to get the rent money they abated after the 2nd failed inspection even though t was obviously their fault.
Gotta love lazy, incompetent people....