The local rental place said that usually contacting your insurance agent to have a rider added to the property insurance policy for the time the machine will be on the site is good enough. Have you tried contacting your insurance agent, then talking to the rental place?

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).