I have a two handle faucet w/sprayer which was just replaced. I also replace the supply line and valves and put in a new hot water heater. Both hot & cold have very low water pressure compared to the rest of the house. I have a 3/4" main line for both hot and cold. All the supply lines are connected to a 3/4 x 3/4 x 1/2 tee. The kitchen is connected by a 3/4 x1/2 reducer at the end of the line. Should I put a 3/4 x 3/4 x 1/2 tee and extend the 3/4 with a cap at the end. What would be your suggestion..

Have you removed the aerator from the spout and then checked the pressure? The aerator screen might be clogged, Check it out. Let me know if it helped. Good luck, Tom

Yes I have, the aerator is clean. There is no water saver on the faucet. The water pressure was low before Replaced everything. The 1/2" copper pipe coming up through the floor was not clogged. I put new valves SS supply lines and a new faucet. Any suggestions?

Try this. Shut the water off band remove the hot and cold stems,
Now place a pan over the open faucet and turn the hot and clod water back on to flush out any mineral buildup that might have been dislodged during installation. Reassemble and test. Better now? Let me know, Tom