I have a 1999 gas hot water heater. Copper pipes in and out of the nipples. Water pressure was 50psi on my drain gauge as it came out. The anode was replaced with a new one. Wire was pretty bare. There were some mineral deposits still caked on, but I'm wondering if those are blocking the hot water exit. Aerators were taken off and cleaned.Changed vacuum relief valve because it was pooling water above the spring. Cold water nipple was clear. Should I cut the copper above the h/w nipple and see if there is blockage? Tried process of elimination. Drained h/w heater completely.