The Pan Under the Water Heater Goes Nowhere

I was in a finished basement in Millis, standing in front of a water heater that was about five or six years old. Somebody had done the right thing and set it in a drain pan.

The pan's drain connection was not being used.

So what was actually there was a pan under the tank, in good shape, doing half of its job. The heater itself was fine on the day. Water heaters generally run seven to twelve years, so this one is not old. Nothing about it was failing while I was there. The pan was the finding, not the heater.

The heater in its space, pan underneath, everything else running past it.

A pan and a pan drain are two different protections. The pan catches what comes out of the bottom of the tank. The drain carries it somewhere you do not mind water going. Without the connection, the pan holds a few inches and then it is over the lip and onto the floor. In an unfinished basement that is a mopping job. In a finished one it is drywall, trim and flooring.

What I recommended is connecting the pan drain to a suitable discharge point so the pan can actually do what it was installed to do.

The pan fitting with nothing attached to it. No line leaves the pan.

My opinion is that this matters most in a house nobody walks through every day. A slow leak in an occupied home gets found because somebody goes down for laundry and notices. The same leak in a house that sits gets found six weeks later, and by then the difference between a connected pan and an unconnected one is the whole repair bill.

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