Wouldn't clean upper rack, not enough water

Checked the water supply to the inlet valve - OK, pulled the filler hose from the outlet side of the valve and checked flow in wash cycle. Results, less than 1/2 gallon. Checked your website, found 94% sucess rate by replacing the valve, so I ordered one. It took about 10 minutes to install with a nut driver, 6" adjustable to connect water supply, and plier to hold outlet clamp open to install it; now we look forward to dirty dishes rather than dumping water into the machine it takes care of itself and we once again get sparkly cups andglasses of the top rack. OU- Rah!!