Raising the drain pipe when plumbing a washing machine is essential for proper drainage and to prevent potential issues that can arise during the washing machine's operation. Here's why the drain pipe needs to be raised:
Gravity-driven drainage: Washing machines rely on gravity to remove water from the drum and expel it through the drain hose. By raising the drain pipe, you create a slope or incline in the hose, allowing water to flow more efficiently out of the machine. If the drain pipe is not raised, water may not drain properly, leading to standing water in the machine or slow drainage.
Preventing backflow: Raising the drain pipe helps prevent backflow of water from the sewer or septic system into the washing machine. If the drain pipe is positioned too low, there is a risk that water or sewage from the sewer line could flow back into the washing machine, causing contamination and potential damage to the appliance.
Minimizing strain on the pump: The washing machine's pump is responsible for pushing water out of the machine during the draining process. By having a raised drain pipe, the pump doesn't have to work as hard against gravity, which can reduce wear and tear on the pump over time.
Avoiding clogs: A raised drain pipe can help prevent debris and foreign objects from flowing back into the washing machine's pump or hose, reducing the likelihood of clogs that could impede drainage.
Meeting building codes: In many regions, building codes or plumbing regulations require that washing machine drain pipes be positioned at a specific height to ensure proper drainage and prevent potential issues.
It's important to note that the exact height to which the drain pipe needs to be raised can depend on local building codes and the washing machine's manufacturer's guidelines. Generally, a minimum height of around 3 feet (about 0.9 meters) above the floor level is often recommended. Always refer to the washing machine's user manual and local plumbing codes for the specific requirements in your area. Proper installation and positioning of the drain pipe will help ensure the washing machine functions efficiently and avoids drainage problems.