Originally Posted by Del Gurney
Sorry chime in late but I dropped the FW tank in mine a couple months ago to replace the drain line valves and paint the frame with had surface rust on it.
Your pump suction Boss should have a small strainer in it.
On the bottom of the tank you may have a 2" drain about 1/3 of the way away from the plumbing connections. It protrudes such that it tilts the tank so it can't be fully drained, (plus holds a couple of precious gallons) ....................
Del, my tank had a Styrofoam sheet under the tank between it and the tub/tray it sits in with a cut out to accommodate the protruding drain plug. It therefore sits flat in the tub and drains fine. One end and the sides of the tub/tray are also insulated with Styrofoam and it is obvious that the Styrofoam lined tray provides freeze protection. The tub and the cavity around the tank also has a hot air duct which supplies warm air to it when the furnace is running. I am wondering if someone removed the Styrofoam sheet in yours once upon a time?