Short Video:
Description: Water return is perfectly fine on "recirculate" mode for hours on end (5 PSI), but on "filter" mode (when it actually runs through the sand media) it starts out strong (9 PSI), but gets extremely weak after 1.5 hrs of running (14 PSI). This started happening after opening the pool for the season, as it was working fine at the end of last season. The pool is full, and blue (no visible algae), just cloudy, and it's basically debris free (I'm still vacuuming to pick up whatever minor debris is left at the bottom).
What I've done: I've checked my connections, checked for leaks, checked for debris all throughout the system, including the laterals inside the filter tank (found no debris), cleaned the mesh at the bottom of the six-way valve, backwashed numerous times and rinsed afterwards, replaced 2/3 of the sand (nothing visibly noticeable in 1 yr old sand), check sand level, even used a neighbor's same model pump (with my filter tank) but got the same results, which leads me to believe the issue is somewhere in the filter. Lastly, I've also checked my chemicals (Chlorine 5, pH 7.5, CYA slowly raising it to 30).
What I've noticed: When I turn off the pump for even 5 seconds, and restart it, it starts strong again.
What I'm working with: Intex Above Ground Pool 22x52, Intex 2800gph Sand Filter Pump SF70110-1.
Any assistance would be greatly appreciated! Happy Memorial Day.
Description: Water return is perfectly fine on "recirculate" mode for hours on end (5 PSI), but on "filter" mode (when it actually runs through the sand media) it starts out strong (9 PSI), but gets extremely weak after 1.5 hrs of running (14 PSI). This started happening after opening the pool for the season, as it was working fine at the end of last season. The pool is full, and blue (no visible algae), just cloudy, and it's basically debris free (I'm still vacuuming to pick up whatever minor debris is left at the bottom).
What I've done: I've checked my connections, checked for leaks, checked for debris all throughout the system, including the laterals inside the filter tank (found no debris), cleaned the mesh at the bottom of the six-way valve, backwashed numerous times and rinsed afterwards, replaced 2/3 of the sand (nothing visibly noticeable in 1 yr old sand), check sand level, even used a neighbor's same model pump (with my filter tank) but got the same results, which leads me to believe the issue is somewhere in the filter. Lastly, I've also checked my chemicals (Chlorine 5, pH 7.5, CYA slowly raising it to 30).
What I've noticed: When I turn off the pump for even 5 seconds, and restart it, it starts strong again.
What I'm working with: Intex Above Ground Pool 22x52, Intex 2800gph Sand Filter Pump SF70110-1.
Any assistance would be greatly appreciated! Happy Memorial Day.
