Hi... Im getting low pressure to kitchen sink and dishwasher. Stops are open full and lav is teed off hot and cold risers ( no problems). Thanks, Bob

lav is teed off hot and cold risers ( no problems) If,
As you say, you have good pressure on the lavatory then the problem is above the tees on the raisers. Disconnect the raisers and then try the pressure. Let me know what you find. Good luck, Tom