Me again... was running some wire to the kitchen last night and when I got down to the breaker box I felt a draft (last night was the first really cold night we've had since moving into the house.) Apparently this @#$%^$^& solar water heater has even more issues than I knew about, there's a freakin' hole in the wall for the piping between the tank and the panel, and I can stick my fingers in it and wiggle them around! This is a basement wall, cinder block with brick facing on the exterior. What to fill the hole with? I assume probably something similar to the firestop that I'm used to using at work for sleeves that are core drilled through concrete decks, but what exactly is the product that I want to buy for this? Please don't tell me I need to use concrete as it is probably way too cold for it to set up properly right now.
thanks,
nate