Steve, I thought about purchasing a scope camera when the problem first occurred, for $99 at Home Depot, but the stem/scope cable is only 24" long. Being my tank inlet was more than 40" from the toilet bowl this wasn't possible. After returning home I further investigated the physical layout of the system. Now I could drill a hole in the 4"inch leader/inlet line in the bay area under the bath floor an insert a scope or even a hot water hose within 12 inches of the tank inlet, if I need to in the future. Hopefully, I can keep my tank maintained with periodic hot water "douches."
Good Luck,
Jim
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