In November of 2019 I installed a Watts Pure Water R/O system with permeate pump under a kitchen sink. The faucet was getting very noisy with hissing from the weep hole/overflow so I converted to a bipass with check valve in July of 2020. The check valve has become progressively noisier with a fairly loud humming/vibrating noise and you can hear hissing from the sink drain as the R/O faucet drains. We do have calcium in our water, but the water isn't extremely hard. The check valve is a year and a half old. Is it common for the check valves to make noise and or fail this quickly? I only hear the noises when the tank is refilling and the water is draining but I can hear the humming/vibrating and hissing from 20ft away. Do I just chalk it up to the nature of these R/O systems and deal with changing the valve every year or two as well as cleaning out the drain tube? Thanks!