I have a hot dog cart with a 7 gallon potable water system. I have a faucet that has a max of 2.0 gpm. I have cleaned entire system out I have great flow of water from hoses but when I attached the faucet it onlly trickles out. I have to have 1 gpm of flow to pass inspection. Does this have to do with the cartridge as it is very tiny.