I just replaced my watts pressure regulator and while the water to the house was turned off, I took out the old leaking 3/4" inlet gate valve and installed a new 3/4" ball valve. The only problem is that the only valve that I could get at the time was not a full port valve. I have a 3/4" delivery pipe coming in from the water main to this 3/4" ball valve that has a 1/2" opening. Will this be a problem with water pressure or volume? I do not see any difference in any faucet but the shower seems to have a little less pressure. Thank you