Knocking in walls when hot water is on, when I flush the toilets, or when I wash clothes upstairs.?

The other day the pipes froze and since they thawed and the water started back running I have been hearing a loud knock and water is not coming out consistently. Its spurting out with each knock??? Hard to take a shower because it will knock the shower off.Knocking in walls when hot water is on, when I flush the toilets, or when I wash clothes upstairs.?
sounds like the builder didn't put a strap on a water line and the pressure from the water causes the pipe to sway causing the noise when it hits the wall.Knocking in walls when hot water is on, when I flush the toilets, or when I wash clothes upstairs.?
air in the lines you may need to install an expansion chamber to your plumbing system they're available at most home centers and pretty easy to install
Definitely air in the lines. Open all the taps until it stops...


Or you could have Gremlins. Don't give them food after midnight and never get them wet!
you have air pockets in the water lines.. The knocking will continue till all the air is out. Try opening all taps and running the water for awhile. This will get any air out of all lines
/Since the pipes were frozen, it sounds like there could either be a cracked pipe somewhere that's blocking the water flow or maybe some parts that are still frozen. Also, did you check the filters on your faucets? They may be clogged. Sometimes after the water's been off or not flowing through, when it flows again, all kinds of gunk gets loose and gets trapped in the filters on the faucets. Happened with me recently. After the plumber fixed a broken pipe, we had to clean all the faucets and shower head. Good luck.
Air in the pipes, have them bled.





duh
You might need to get your pipes replaced. Because if there is leaking water, that could cause water damage and then lead to mold problems, and you dont want that. So fix the problem now while its still small.
air in the lines