While examining the AC condensate drain, I noticed that the pipe coming from the pressure relief valve on the hot water heater joins it. (Actually, it _used_ to join it; now that joint is completely loose.) The condensate drain pipe then travels another couple feet and drains into the pipe for the clothes washer drain.
Is that a good idea? Somehow I don't think so.
Also, the pipe they used coming off the relief value is PVC not copper. Is that good?