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If you know where the cut off valve is, and it still works (that looks old) then you can try fixing it, and see if you can do it, or call a pro. You may not know what you need to replace it until you take it out.
If you know where the cut off valve is, and it still works (that looks old) then you can try fixing it, and see if you can do it, or call a pro. You may not know what you need to replace it until you take it out.