I saw a water heater stand at Home Depot but it's about 15" high. That's a bit too high for my basement. Can I just make one with 2×4 and plywood that's only 4" tall, basically just enough to be able to drain water off the drain tray? Or does the code require it be higher?
Water – How high to raise water heater above floor
water-heater
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Best Answer
Regardless of code, I like to get them off the floor just in case the basement floods. My preferred (and easily available anywhere) solution is a few solid concrete blocks; one under each foot. You can stack them if you want, too. This is an easy way to increase the height in 4" increments.
I don't suggest using lumber. If your floor is the least bit hygroscopic, it will rot from the underneath even if the tank never leaks.
16" x 8" x 4"Solid Concrete Block:(source)