I changed the aerator on the kitchen faucet, but still get slow flow. The sprayer works fine and has great pressure, as do all other faucets in the house. What now?

You might need a cartridge repair kit for your faucet. Sounds to me like there is an obstruction of some kind in the valve. Sometimes the obstruction is the gasket material, so before you take it apart, it would be a good idea to have the repair kit (about $20) on hand.

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