I bought a 2002 Bigfoot truck camper last summer, and winterized it, following the directions, When I got it running this summer there was no water pressure and I noticed water leaking out on the floor outside the shower. there was also water leaking out by the blackwater access door, which is under the shower. I'm assuming the water line to the shower froze and cracked. Is there a way to repair this without taking out the shower?