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You would have to pull the belly pan down some to access that area. Did you check to be sure it wasn't just a fuse blown? I don't have any access to the plumbing diagrams from Cedar Creek units, so you would have to try a dealer for those. In the shop we just pull down part of the underbelly from the side so we can spot that tank and valve and then go from there. Chances are good that both that and the other tank valve are there together close to where the main drain line exits the bottom area. I would look there first. OR if this is the separate gray tank it is usually across from where the sink is on the driver's side. Hope that proves helpful here. Please get back to me if you need more input from me here as all follow ups are included and fully expected in our fee.
If you have the underbelly off you should be able to see all the tanks and valves. The galley tank is USUALLY the one by itself opposite the sink area. Do you see that or not?
Not any problem.......this isn't a DIY job anyway. I will submit this for a refund.