Residential home install off a 50 gallon natural gas water heater.

I have reconsidered my decision on that 1st 2.5" galvanized nipple out to brass tee. I should have used all brass. I am going to pull out the galvanized and replace with brass nipple this weekend, the reason is because I won't have to worry about galvanic corrosion with that connection and it's good insurance.

get your pump here
https://www.supplyhouse.com/Grundfos...

and your union fittings here
https://www.supplyhouse.com/Grundfos...