. >> good floon commissioners my name is steve punely chief plumbing inspect. was asked to speak today but some of the gray water, black water now, reclaim systems. different types of water types. rain water collection systems we have in san francisco on water heater kwz what wree tying to do in san francisco in order to help with the drought and energy wise. when it comes to the on demand water heaters just quickly, like to explain a few things. on demand water heater run on energy and high gas, larger gas lines compare today what we have now, so 23 somebody is row lacing the water heater they have to increase the gas line to have leck tistry and change the sflus and it is a little more expensive. the problem with on demand water heatericize the size of thewater heat squrz the price and location and that they do run on power. if you have a earthquake like [inaudible] in 1989 where half the marina didn't have power for 3 or 4 days you wouldn't have hot water. the recovry isn't there. you don't have storage as well. on demand water here're is coils, there is no