I've owned my 2002 passage 456 for 13 years and just recently I noticed my fresh water system started spitting and acting like I was out if water..i filled the starboard tank and issue persisted ..i changed to another tank and eventually the air or whatever cleared. So my issue is with the starboard tank.., it's full of water but when you open a faucet you get water but it spits like it's emptying....looking at the filter bowl it's not full ...it appears there's air in that line..but from where? And why no water leak? Pump does not run so clearly water isn't leaking....im stumped so anybody who might have encountered something like this please give me a suggestion...i have no idea how I would access the pick up from the starboard tank but if there was a leak water would be coming out also would it not. Help?