I was just uncovering my equipment (which I take in my 2 spaflex hoses, pump and my filter-to-pump-hose-re-inforced-vinyl for the winter) and I found this (see pic) on my backwash hose(same type as my filter-to-pump) which I leave out. The filter and hose was covered with a blue tarp. This is my 6 year of doing this - never have I seen this before. I am in western pa -- could the heat under the tarp get that hot???