One water hammer arrestor, or 2?

[mattster1975]

I have put on a sioux chief mini-rester on the hot water only for my LG washing machine.

We only get hammer on the hot water side, so I don't see why I need 2 arrestors, except for the fact that it still hammers really badly.

Is there any reason to put an arrestor on the well behaved cold water side? Should I put on 4 arrestors? (on one the washing machine and one at the supply valve?).

The LG is 5 years old, maybe I can just junk it and get a washing machine that is not so noisy ...

 

[hj]

If you do not put the shock arrestor in the correct place it will do absolutely nothing to eliminate or reduce the noise.

 

[Sponsor]

 

[Jadnashua]

For an arrestor to work at it's best, it needs to be as close to the solenoid valve as possible. What it is trying to do is to provide a path for that rapidly moving column of water to go when the valve suddenly shuts off. The air cushion in the arrestor provides a means for the water column to slow down gracefully, rather than running into a 'wall' so to speak, where that impact can make some noise and possibly cause damage.

 

[Terry]

I install the arrestors for both the hot and the cold on a washer.