Just to complete the hijack(I know how everyone loves a solution post), I disassembled the valves and found a wad of TP jammed in the valve. Cleaned everything and reassembled. Oh, I usually fill the toilet bowl about 4 times and dump it into the tank after I've emptied it. I know better than to leave it dry.
Now we can get back to the wind...which seems to have picked up some this morning.
I absolutely love Reversible outdoor carpets. My rambunctious lab has peed, ran, played, sleeps, lots of foot traffic on them, etc on these and they still look great! I never put the iron directly on the mat itself. If dirty I get the blower or hose them off, they clean super easy.