Water drain line pours out water when pump is on
96 holiday rambler endeavor....Last few times out camping noticed we went through water fast (boondocking)
Upon inspection, i found water is dripping out of drain line. Opened line and with pump on water pours out.
Replaced water pump about 2 years ago .
Can someone give me an area to start?
Bad check valve?
Leaking ? Any help would be appreciated thanks