Plumbing Fittings Question:

IMHO unless the HB is new enough to match the insides with the exact same brand, model et - replace the darn thing. You can try , but , I just don't seem to have permanent success when I just repair them. Now to replace them- if they come through the wall under the house then they can be unscrewed or unsoldered from the crawl space. If it is above the floor a *window* has to opened in the wall. Just unscrewing it from outside will often result in a broken pipe in the wall.