Quote:
Originally Posted by Investment Painting Contractors
Are you sure that you're not looking at your AC drain line? There is no reason for your water heater to be plumbed to the exterior of your home. The AC is supposed to drain outside.
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FYI, Half of the homes in our CYV loop (built in 2005) have pressure relief valves instead of expansion tanks on the cold water inlet pipe above the hot water heater. It drains on the outside of the house next to the garage door. There's also a second standard pressure relief valve on the side of the tank which drains into the drip pan underneath. The local plumbing code calls for either the expansion tank or the pressure relief valve--on the cold water supply side. Either one meets the local plumbing code. We originally thought the expansion tank was a better approach but we're seeing that when the expansion tank fails, that it fills with water and the weight pulls down or deflects the PVC supply pipes. I should think the code should also call for this pipe to be better supported to prevent it.