What are the threads for cold water and hot water line into water heater

[Swftonyc.com]

Hi I have this 50 gallon hot water heater that I need to replace. It's an old natural gas model made by american water heater company. First I closed the cold water valve and drained all the water from the heater. Now I try to remove the cold water and hot water lines that go into the heater at the top, and using a big adjustable wrench they won't even move a bit. Are they regular threads(which meaning counterclockwise to loosen) or reverse threads? Upon closer inspection I noticed there was some dried silicone sealant at the connection. Is that the problem? Or should I use a way bigger wrench?

 

[Reach4]

Regular threads.

Or should I use a way bigger wrench?

Maybe, and you could maybe put the water back before cranking.

What is your situation? Often you will want to use a corrugated copper or stainless connector for the last 18 inches. If you have galvanized or copper running right to the WH, maybe you want to use a saw or pipe cutter rather than unscrewing at the WH.

I see you have not even selected what kind of WH to get.

I am not a pro.

 

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[Cacher_Chick]

Residential units are standard pipe thread. A bigger wrench, or a pipe on the one you have for leverage will get it done. Is is sometimes helpful to have another person to hold the tank in place.