answersLogoWhite

0


Best Answer

This is called water hammer. Water is heavy, and when it is moveing through a pipe it will have water flowing from a point that could be some distance away. A 1.5" pipe that is 20 feet long will have 1.8 gallon of water or about 15 pounds of water. All the water in this line is now moving to the open faucet. Water does not compress so the 15 pounds of moving water has no were to go and can act like a rod of steel hitting your pipes. It is common for a small device that has air in it to be installed in the piping. This will give the water an air spring as air can be compressed. You could just put in a dead end T with some pipe standing straight up with a cap on it. Waterman

User Avatar

Wiki User

16y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What causes a loud knocking sound like a jackhammer in home plumbing when water is being?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What causes a knocking sound after car is shut off?

The combination of fuel still being pumped into the engine and air


What is plumbing top out?

Plumbing top-out is the stage of plumbing that occurs when a home is in its frame stage. There are three stages of plumbing typically in construction. Plumbing rough (prior to the foundation being poured); plumbing topout (bringing ground plumbing up through the vents); plumbing trim (installing fixtures).


Who is knocking at the door change the voice?

Who is knocking at the door


What are three plumbing thread tapes?

There are actually 27 tapes used in plumbing depending on the application and medium being used


Why would an 89 cad deville make a knocking sound when its off and parked?

Most likely your motor is low on oil and is knocking from being over heated.


Why would the engine of a 1997 Chevy Cavalier make a loud knocking noise even after being told that there is nothing wrong with it?

it's probably a rod knocking


Why is my 2003 cavalier engine knocking?

Engine knocking can be caused by numerous things. Having the incorrect spark plugs, carbon deposits on the cylinder walls, and being low on engine oil may all cause a knocking sound.


What is the cause of a knocking sound when applying the accelerator?

your car being broke get it checked out


Loud knocking noise and High oil pressure on a 1991 Chevrolet Mini Van?

You probably have two problems. The first one being a faulty oil pressure switch that causes the oil pressure to give a false high reading. The knocking problem could be caused by worn main bearings or worn rod bearings. I have also experienced knocking sounds caused by a worn timing chain and/or a loose torque converter. Hope this helps you.


What is the passive voice-somebody was knocking at the door?

The door was being knocked at by some body.


What causes a knocking sound in the transmission when the car is stopped?

are you sure the noise is coming from the transmission. most cars will make a knocking sound due to the lifters being a little stuck. to see if it is a lifter noise, at the net oil change use a qt of lucas oils. there will be one that says something about lifter noises on the front, found at any parts store


Knocking noise when accelerating?

The knocking noise is commonly called spark knock. The knock can be called by the engine timing not being set correctly, or using gas that has too low of an octane for the engine.