08-27-12, 02:23 PM | #1 |
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Necessity of a water hammer arrestor?
I replaced the kitchen faucet at my grandmothers last night. The new faucet must turn the water on/off faster, or have a higher flow rate than the last one because the water hammer effect is fairly bad. It moves the copper pipes in the basement around 1/2". I know this isn't good an the pipes will eventually fatigue and spring a leak somewhere. I'm thinking the best way to fix this is to add a water hammer arrestor? I know what they are and what they do, but I've never put one in or if there are other options.
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08-27-12, 03:47 PM | #2 |
Lex Parsimoniae
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LOL! Tell her to turn off the water very slowly..
I've used water hammer suppressors that looked like small versions of expansion tanks. 0269503 - Watts 0269503 - 150A, 1/2" Water Hammer Arrestor Sadly, they only lasted a few years before the rubber disc wore out and leaked. Can't really recommend them. I went with a DIY air-pocket unit using 3/4" pipe. But, I placed the pipe very near where the water comes into the house. Kinda like this.. I've used short air-pockets before and sometimes they fill up with water (to the top). So, my 3/4" air pocket is about 6 feet tall.. It's never filled up yet.. If you decide to add some, I think at the end of a long run without bends is the best place. (Mine is at the end of the long 3/4" run from the street). If you can use a gentle turn, instead of a sharp 90deg turn into the air pocket, it will work better. Like using a couple of 45deg elbows, instead of one 90deg elbow.
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08-27-12, 07:01 PM | #3 |
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+1 for the Xringer's suggestion.
Also where the pipes are moving add more brackets to secure the pipe. Straps or brackets every couple feet. |
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