Water leak.

[beaverman]

1990 Beaver Contessa. I have a 1/4" plastic water line from the filter under the sink [runs to a shut off valve, small much like you would see on the bottom of a radiator on a car] labeled purifier shut off valve. t's off of that and goes to water purifier filter for sink and another small shutoff valve labeled ice maker drain. These valves supply water to purifier spout and ice maker I think. Now when city water or water pump is on I have a water supply everywhere in the coach including bathroom and shower except for water purifier and ice maker.. If I open water supply shut off valve to the water purifier or ice maker I have a supply of water but also a massive leak out side the coach by the water tank which is located right below where all this is located and gets water all over the basement floor and water tank floor and on the ground.
Does that 1/4" water line get water from the tank separately from the main water source? If it does I don't understand how it would be pressurized.
One more thing, all routing and plumbing appears to be original manufacture and match pictures in owners manual. The ice maker is a separate unit from the fridge. I have no water leaks behind it or on top of the main floor its leaking down below somewhere as though water is being pushed through the ice maker drain and overboard. I closed just the ice maker drain line shutoff valve and left water purifier shutoff valve open but it did the same thing.

["007"]

Welcome Beaverman to irv2.
If you shut off all valves feeding the ice maker, purifier, water filter under sink and turn on water system do you still have leak?
I would look for water source feeding the 1/4" line which maybe off your 1/2" piping in one of your compartments. Would not think 1/4" line would feed out of your water tank.
The 1/4" connector maybe loose at source or pulled out of pipe fitting.