Low Water Pressure - Single-Handle Pull-Down Sprayer Kitchen Faucet

[PitneyBowes]

Hi All- I have the below Single-Handle Pull-Down Sprayer Kitchen Faucet with very low water pressure coming out. I have tried changing the cartridge but no change in water pressure. The lines are fine and there is no blockage in the aerator (with the sprayer removed, no effect). Any other suggestions for debugging htis?

 

[GReynolds929]

There are usually check valves in the adapter at the end of the spray hose that connects to the faucet under the counter. They can easily get clogged with sediment. I would check there.