Would need to see it as a ratio to know if that is actually a bad thing or not . Could be only 0 . 1 % of pipeline oil is lost but 2 % of train oil , we can ' t tell without knowing quantities . <| sep |> ugjs 520820 definitely has the best advice . But , my question is whether or not the low pressure has always been the case or just recently . If it ' s always been , simply having too many elbows leading to a fixture can result in a surprising amount of pressure loss . If it ' s possible for you , my extremely unprofessional opinion would be to run new lines of pex for both hot and cold from near their sources right to this fixture . Source my house has the exact same issue as yours , except my kitchen faucet cold side has perfect pressure and hot side is quite low . Cold run has 4 elbows and hot side has 8 . Like you , other faucets in house all have perfectly adequate pressures .