Diverter valve problem in Delco Model 21925 kitchen faucet.
~ 6 months ago I installed a Delta 21925 kitchen faucets for both my daughter and my wife. The spray attachment diverter valve (P/N RP6073) in my daughters faucet seems to be sticking (little/no water at spray nozzle). I checked for sediment in spray attachment - - no joy. Pulled diverter valve, attempted to clean/lube it and reinstalled. Also, no joy. Don't know exactly what valve is supposed to be like. Should I be able to move valve off seat by "shaking" it up and down (I can't)? Faucet is still under warranty but I'm willing to buy diverter valve just to get things back on line.