MB-17 Polyethylene Water Meter Box Approximate Measurements 18" x 11" x 12" and tapers to 22" x 15 1/2" x 12" The new MB-17 water meter box is designed for a 1" up to a 1.5" meter set. It was developed as a replacement for the heavier concrete 37 boxes on the market today. The MB-17 box is versatile and strong. The new rib reinforced design allows this sturdy box to withstand over 20,000 pounds in an H-20 style test. The standard depth of this box is twelve inches and can be either ordered with or without the the bottom settling ring. The box accommodates a standard 11"x18" lid.