galvanized

Had a few questions. My house is about 65 years old and has galvanized water supply lines. Loosing pressure and crap breaking loose in the pipes is causing pressure drops. I have a 5/8" meter and the original supply from line 3/4 inch where it splits to feed water heater and rest of house...

I posted this earlier but perhaps in the wrong section . My apologies . I’ve been working under my house replacing most of the galvanized half-inch with PEX. I have one long continuous pipe that runs to the far side of crawlspace with cery difficult access. I found the spot to tie in but...

Was just doing some work under my house and I accidentally started to loosen a galvanized pipe . Only about a quarter turn. Then I re-tightened it. Its a long stretch of pipe and I cant see the other connecting end. Can I expect this to leak now?