I am the new owner of a 2009 Coleman Niagara high wall pop up. The unit was well maintained but the previous owner did not use the city water. The kitchen sink has hot water but no cold, the toilet has water but not the shower, the outside shower has hot and cold The Pex piping under the unit is in nearly new condition. Any ideas on where to start.
Likely has nothing to do with city water vs fresh water tank.
When you say no water do you mean zero, faucet knob doesn’t even let out some air or kick on the pump (fresh water tank)?
About impossible to diagnose a partial issue with little description start taking things apart. Like disconnect cold from faucet turn on water to diagnose obsolete faucet as issue or upstream.
start with easy one first can get to kitchen plumbing but not shower. Care of first issue may help with diagnosing the second one
Assuming private purchase because it’s old and you said prev owner. Did you ask them?
Take the aerators off the faucets then see if they work.
