Mr. & Mrs Bartlett,
Your disregard for the advice you have been given leads me to believe you did not understand the answer.
Your Water filter, whether it is attached to the hose or built in at the water bay, is not what you being told to check.
If your RV has a regular response to flushing the toilet and no water interruption at the flush. Just like in a brick and mortar building each sink has a screw on screen/filter at the tap. Wrap the end of the faucet with a soft cloth and unscrew (pliers).
Turn on the faucet without the screen attached. If your sink flows freely without the screen, then .....
Old style- soak the parts in vinegar, and use a pin or needle to clear clogged holes and any sediment.
