Top picture is my water heater as it was supplied brand new in the box. Bottom pic is of my brewing burner. I'm wondering if the heater (top pic) is missing a plate similar to the brew burner (bottom pic) or if it is ok as supplied. Flame is aggressive, loud and has more orange in it than I think is normal. If I choke off some of the entry point for air the flame turns more blue / efficient looking. So the question goes back to if the burner is correct and not missing anything. If it's normal, maybe it is a venting issue. I vented this heater same as old one but old was 40 gallon 3 inch vent this is 75 gallon with 4 inch vent. Vent comes out of hood with a 90 then raises horizontally (plenty of rise, well over 1/4 inch per foot) for about 5 feet into a 6 inch for about 4 feet then a 90 and straight up. I'm thinking I need to go straight up out of the hood a foot or so then 90 over and do my upward slope. I read a lot on venting and everyone says it's a bad idea to put a 90 right down at the hood. Is this correct? Thank you.