One possible reason why your pool pump is spitting out diatomaceous earth (DE) is because there is a suction leak on the pump. This means that when the pump shuts off, air is drawn into the system, which causes DE powder to be forced out of the main drains or skimmer.
When there is a suction leak in the pool pump, it disrupts the normal flow of water and can lead to various issues. One of these issues is the expulsion of DE powder. DE powder is commonly used as a filter media in pool filters to help trap and remove small particles and impurities from the water. It is a fine white powder made from the fossilized remains of diatoms, a type of algae.
Here’s how the suction leak causes the pump to spit out DE powder:
1. Normal operation: During normal operation, water is drawn into the pump through the skimmer or main drains. The water passes through the filter, where DE powder coats the filter grids or elements. The filtered water then returns to the pool through the return jets.
2. Pump shut off: When the pool pump shuts off, a backflow prevention device called a check valve should prevent water from flowing back into the pump. However, if there is a suction leak, air can enter the system, disrupting the water flow.
3. Air enters the system: As the pump shuts off, air is drawn into the system through the suction leak. This air displaces the water and creates pressure within the system.
4. DE powder expulsion: The pressure created by the air in the system pushes the DE powder out of the filter grids or elements. This can cause the DE powder to be forced out through the main drains or skimmer and into the pool.
There are several potential causes of a suction leak in the pool pump:
1. Loose or damaged fittings: Check all the fittings and connections between the pump, filter, and plumbing lines. Look for any loose or damaged parts that may be allowing air to enter the system.
2. Cracked or damaged pump lid or basket: Inspect the pump lid and basket for any cracks or damage. A faulty lid or basket can create a suction leak, allowing air to enter the system.
3. Leaking pump seals: The seals in the pump can wear out over time, leading to leaks. If the pump seals are damaged or deteriorated, they may need to be replaced to prevent suction leaks.
4. Faulty check valve: The check valve, also known as a one-way valve, is designed to prevent backflow into the pump. A malfunctioning or faulty check valve can allow air to enter the system, causing suction leaks.
To fix the issue of your pool pump spitting out DE powder, you will need to locate and repair the suction leak. Here are some steps you can take:
1. Inspect all fittings and connections: Carefully examine all the fittings and connections in the pump, filter, and plumbing lines. Tighten any loose connections and replace any damaged parts.
2. Check the pump lid and basket: Inspect the pump lid and basket for cracks or damage. If any issues are found, replace the lid or basket as necessary.
3. Replace pump seals: If the pump seals are worn out or damaged, they will need to be replaced. Consult the pump’s manufacturer or a pool professional for guidance on replacing the seals.
4. Test the check valve: Check the functioning of the check valve by removing it and inspecting it for any damage or debris. Clean or replace the check valve if necessary.
Regular maintenance and inspection of your pool equipment can help prevent suction leaks and other issues. It is also important to ensure that the pool pump is properly primed and that the water level in the pool is adequate to maintain proper suction.
If your pool pump is spitting out DE powder, it is likely due to a suction leak in the pump. This allows air to enter the system when the pump shuts off, causing pressure that forces the DE powder out of the filter grids or elements. By inspecting and repairing any loose or damaged fittings, pump lid, basket, or pump seals, you can resolve the issue and prevent further expulsion of DE powder. Regular maintenance and care of your pool equipment are essential to keep your pool running smoothly and avoid these types of problems.
