I would trace your plumbing lines for any valves that may be shut.
Rv water inlet not working.
Third is the filter for the incoming city water.
After thoroughly draining the tank flush the entire system from the water inlet all the way to the holding tank.
Turn the water back on and see if there is plenty of pressure and flow.
Make sure the correct valves are open for city water.
The rv city water inlet is an easy.
On occasion the one way valve in the city water inlet on some rvs breaks and the pieces can block the water flow.
To flush use four parts vinegar mixed with two parts of water.
A specialized rv drinking water hose is drinking water safe and made of materials approved by the national sanitation association which contains no toxins rubber or lead.
If you have a city water regulator it might be faulty allot of times they will just plug up.
Simply twist the regulator onto the spigot and connect the other side to the water hose.
First turn off the water at the rv site hose bib and then disconnect your water hose from the spigot.
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This ensures the pressure is correct before it ever even enters the hose.
The proper rv water pressure regulator location is between the water source and the freshwater hose.
If the water does not flow freely take a small gauge wire or coat hanger and push through the drain opening to eliminate any obstructions.
To hook up to the rv city water inlet you must first remove the outside cap and get a hose that is designed for drinking water.
Just recently the check valve on my city water inlet decided to act up allowing fresh water to exit the rv when the water pump was turned on.
How do i remove an rv water pressure regulator.
If this is the case then the problem is on your side.
Also check the obivious.
Attach the hose to the unit directly or you can use an elbow connector to make it easier to get connected and disconnected to the rv city water inlet.
I m not sure which connection you have in your coach but it will have some sort of check valve and that could be plugged or faulty.
Once connected to the rv city water inlet.