i would think that with my pressure regulator at the city water spicket set at about 40 psi, i would not be in any trouble , but i will check the valve...if only i knew where to look!!, i;ll send some pics in a couple of days. i have sort of isolated the leak from the outside, it's running down from up-under the plastic casing that girds that corner, then runs down along the bumper, and onto the ground. does this mean that it's NOT my holding tanks, or am i just not that lucky?