After talking to the home owner I found that there was a problem with the master bath. There was low water pressure on the cold side only foe both the vanity faucets but there was good hot water. Both of the faucets share a angle stop. The customer had just installed both of the faucets and he also had installed a feel standing soaking tub with a Amazon brand free standing tub faucet with side sprayer. An it also has low water pressure but unlike the faucets it has a low pressure problem ok both sides I went down an inspected the line in the basement an found they are cpvc 1/2 an everything looking good on the line they were ran very nicely. After inspection I told the home owner that the lines all need flushed out or they need replaced to get rid of the restrictions. The home is a well set up. Pumping out of a tank in the front yard it is filled by a water hauling company I would recommend a well type water softener a new whole house filter customer decided that he would try