Why Water Hammer Arresters Are SO Important | GOT2LEARN

what's up guys and welcome back to another video so what is a water hammer rester and how does it work at first view a water hammer rester is basically a soldered threaded crimped or pressed device that dampens hydraulic shocks in a system such as an domestic water or gas installations but where exactly do these so called shocks come from in a home for example they either come from fast closing solenoid valves which could be found in washing machines toilets and refrigerators or just from a user that shuts off a faucet really quickly these fast closing valves do exactly as they say they shut off real quickly so just imagine what this does an object or liquid flowing in a particular direction at a certain speed that is suddenly halted and either has two choices one is to absorb the impact like we could see here in this car ouch or two is to redirect itself in the opposite direction like this tennis ball the analogy here is to show that some objects and liquids are compressible and some are not in this case we aren't talking about a car but rather about water and water itself is not compressible which means it would bounce right back in the other direction when a valve would close and create these audible shocks or pressure surges this abrupt change in velocity causes a rise in pressure which needs to be relieved somehow back in the days plumbers use the air chamber method to solve this issue which consisted of a capstan pipe near the fixture in question that would be filled with air and cushion any surges from it being closed quickly the problem with this idea is that it will work for a few weeks but then the Chamber's air would get absorbed by the water and eventually be rendered useless because nothing was there to separate the air from the water without any shock absorption device these surges would cause rattling in the walls and eventually weaken the joints enough leeks so it's imperative to have some sort of protection this is where these come into play these engineered hammer esters are specifically designed to seal the air chamber from the water thanks to the two sealing o-rings on the polypropylene piston so when the valve is closed abruptly the shock is absorbed by the arrestor and the excess energy is quickly depleted in the lines making for a very silent and non damaging operation these devices also address another very important issue if we go back to the old air chamber method we could see the water that filled the stand pipe is now stagnant which is a perfect place for bacterial growth such as the Legionella bacteria these air chambers which are also known as dead legs are being eliminated and replaced by code by engineered arrest errs to avoid any potential sicknesses from these bacteria as with these devices the water is replaced every time it is used making it a much safer option what's nice is that they come in a bunch of different varieties such as washing machine feeds refrigerator feeds and many other shapes and forms so it's easy to implement on a system when doing renovations and such and that is how a water hammer arrestor works I hope you guys learned something from this video and if you did help share the knowledge by sharing this video with your friends and giving it a thumbs up and until the next one thanks for watching

Channel: Got2Learn

Views: 1,864,296

Keywords: plumbing trick, plumbing hacks, plumbing, plumbing videos, plumbing tools, plumbing basics, plumbing repair, plumbing diy, plumbing how to, plumbing video, how to do plumbing, how to repair plumbing, how to fix plumbing, rough in plumbing, how to solder, soldering copper pipe, how to solder copper pipe, how to sweat copper pipe, how to sweat copper fittings, got2learn, How to Solder Copper Pipe The CORRECT Way, how to solder vertical joint, water hammer arrester

Id: FbkE0HhEHVY

Length: 3min 53sec (233 seconds)

Published: Sun Jun 28 2020