Why do they use anodes then if water does not touch the metal as you suggest. If there was no contact with metal because of glass layer..no need for an anode .I am not necessarily suggesting widening the hole but rather making the 1 inch std heating element cut down to 3/4 inch and rethread to 3/4 as has the suburban tank. I am trying to find out why this cannot be done. seems not to difficult . The 450 watt seems like a long time to heat water. The 1500 watt std does it in mere minutes.Not trying to save money ..looking for better system.