Low pressure on your pool pump usually indicates a flow problem on the intake side, meaning something is blocking or restricting the water flow into the pump.
Here's a breakdown of potential causes:
Potential Causes of Low Pool Pump Pressure
According to the provided reference, low pool pump pressure almost always points to an obstruction before the pump. After the impeller, the water is under pressure, and obstructions increase the pressure. Therefore, focus your troubleshooting efforts on the intake side of the pump.
Here are some common culprits:
- Clogged Skimmer Basket: This is often the first place to check. Debris accumulates quickly and restricts water flow.
- Clogged Pump Basket: Located just before the pump impeller, this basket traps larger debris. A full basket significantly reduces flow.
- Blocked Skimmer Line: The pipe running from the skimmer to the pump can become clogged with leaves or other debris.
- Partially Closed Valves: Ensure all valves on the suction side (before the pump) are fully open. A partially closed valve restricts water flow.
- Dirty or Clogged Filter: While a dirty filter typically causes high pressure, a severely clogged filter can sometimes restrict flow enough to manifest as low pressure at the pump if the blockage is significant enough to impact intake suction.
- Air Leaks: Air entering the system before the pump can reduce pressure. Check all fittings and connections for tightness. Look for bubbles in the pump basket.
- Suction Leak: A crack or loose fitting in the suction line can allow air into the system, leading to low pressure.
- Collapsed or Kinked Suction Hose: (If applicable) Check the suction hose (if you have one) for kinks or collapse, especially if it's old or flexible.
- Low Water Level in the Pool: If the water level is too low, the skimmer may suck in air, reducing the water flow to the pump.
Troubleshooting Steps
- Inspect the Skimmer and Pump Baskets: Empty both baskets and ensure they are clean and free of debris.
- Check Water Level: Make sure the water level in your pool is adequate.
- Inspect Suction Lines: Check for kinks or collapsed sections in the suction hose (if applicable).
- Check Valves: Ensure all valves on the suction side are fully open.
- Check for Air Leaks: Look for air bubbles in the pump basket or leaking water around fittings. Tighten any loose connections.
- Backwash or Clean the Filter: While a dirty filter usually causes high pressure, it's worth cleaning or backwashing the filter as a precaution.
- Inspect Skimmer Lines: A blockage in the skimmer line can often cause lower pressure.
By systematically checking these areas, you should be able to identify and resolve the cause of the low pressure in your pool pump.
