I'm soliciting ideas for a DIY sight glass for my HLT. I have a 8 gallon SST Polarware kettle that I am repurposing on my rig that I noted I need to come up with a good way to check water level when I am filling it. Safety first is what's in mind over it being on target. I just want something simple so I can see when to turn off the pump other than an overflow or climbing the ladder every couple of seconds to see where we are at. I've got half the materials so I'm thinking of a putting a barb with some clear tubing on an inverted "Tee" fitting inline with my ball valve. What I need to come up with is some means of keeping the tubing upright. Thoughts and suggestions welcome.