I have the same kind of setup and I fixed that problem by plumbing water lines to my HLT and kettle. With the turn of a vale I can fill the HLT without any climbing.Mine is a 4-tier. the only difference is my boil kettle is 20" off the floor so I can drain (or siphon) into a carboy. Somethin to think about. The only drawback is the bottom of my HLT is 6' high so you almost have to have a hose to fill it (or get a workout pouring smaller containers of water in there). Also, the top of my Mash Tun is 6' high, so I have to mash-in with a step stool.