What is the minimum height for a washing machine standpipe above the base of the machine?

The minimum height for a washing machine standpipe above the base of the machine is set at 30 inches. This requirement is established to ensure proper drainage and to prevent any backflow or spillage that could occur if the standpipe is too low. By maintaining this height, the plumbing system is better equipped to handle the volume of water that a washing machine discharges during its cycles. Additionally, having a standpipe at this height mitigates the risk of siphoning, where water could be drawn back into the washing machine, leading to potential contamination or malfunction.

The dimensions specified in other options do not conform to the required standards for washing machine installations, which is why they are not considered appropriate.