thanks for all the help - I ended up calling a plumber who was a friend of a friend. He needed a blow torch to get it off so there is zero chance I could of done this myself but I learned a lot in the process.
It took him about 2.5 hours to replace it.
Thanks again for all the help
It's a shame I can't fix anything around the house. I appreciate all the contributors here and have learned a lot reading these forums. Thanks to everyone for their input.
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the water is dripping consistently and it is warm. It is coming...