What you want is more like a manhole. You should use something at least as large as the 16" square chimney blocks that give you at least a 12" inside square. Think of having to work inside with a wrench to replace the meter.tsutomua said:My water meter is located about 2 feet below the lawn. What I am trying to do is to stack concrete blocks (the gray one, about $1 each) and put the water meter box or the lid only on the top. I am going to apply morter between the concrete blocks. Does anyone foresee problems in this approach?