I was winterizing the 24V today and noticed a steady stream of water coming off the water distribution housing. Once removed it was discovered that it had cracked from the pipe threads to the outside of cover. There is a part number on mine that says 863631-A1 but when I am searching the internet all of the ones I am finidng say 863631T1, almost the same part number and this part number looks exactly like mine. Can anyone tell me if they are one in the same?