try to troubleshoot everything before you install a ball valve, it might shorten the pumps lifespan if its not rated for back pressure.
i have a circulation pump rated for 1090 gph on 2x 1" bulkheads and i had to install a ball valve to slow the water INTO the sump.
maybe there is some little problem youre not seeing...
i have a circulation pump rated for 1090 gph on 2x 1" bulkheads and i had to install a ball valve to slow the water INTO the sump.
maybe there is some little problem youre not seeing...
