Hi, I have a Delta 2300 Series shower faucet, it has two handles, one for temperature and one for pressure. It has never had great water pressure but it has progressively gotten worse. My first thought was that the shower head was clogged and cleaned the screen and the head. I also had a slight drip so I replaced the following parts: The stem unit assembly and the seat and springs in the pressure side, and the seat & springs in the temperature side.( these were the only parts available at Home Depot). When this didn't resolve my pressure problem I talked to local plumbing supply company and they suggested I replace the housing assembly in the temp. side. I ordered the part installed it and I still don't have water pressure. The sink faucet in the same bathroom has great pressure.
Any Suggestions?

Thanks