I have a Hayward power flo matrix 1HP pool pump and a 16" Hayward multi-port sand filter. i have recently changed the sand, cleaned the laterals and inspected them for any damage. Put everything back and checked for leaks in the line. I back washed and rinsed a few times and turned on the filter. The PSI reads 15 at first and the water pressure from the return jet is great, but after a half hour the PSI goes up to 20 and the pressure at the return jet drops to almost nothing. I also noticed the pool pump is running a little hot, but the prime has no issues. I have tried everything at this point and the same issue persists. Wondering if anyone else has experienced a similar issue and may be able to provide helpful tips.
Somebody please help me! PSI increases after 30 minutes of running the pump.
- Thread starter corim
- Start date
- Jun 22, 2014
- 48,285
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Welcome to TFP! 
Your situation sounds like the filter is overwhelmed with organics. Classic pre-algae situation. Can you post a full set of water test results?
Also see --------------- > Pool Care Basics
Your situation sounds like the filter is overwhelmed with organics. Classic pre-algae situation. Can you post a full set of water test results?Also see --------------- > Pool Care Basics