O-ring for Bulkhead Assembly Pentair 35505-1429 0.139 X 1.609

The best way to troubleshoot low suction is checking for clogs, backwashing the filter, and ensuring proper pump operation.

No, typically you don't need to drain the pool to replace an underwater light. Most LED fixtures allow for bulb replacement while submerged, but ensure the power is off before proceeding.

On average, a well-maintained pool pump can last 8 to 15 years. However, it’s essential to monitor its performance. If you notice reduced efficiency, increased noise, or frequent repairs, it may be time to consider a replacement.