Do Water Hammer Arrestor Need to Be Vertical?

Water hammer arrestors can be installed vertically, horizontally, or at any angle in between. The most important thing when installing an arrestor is to place it as close to the valve as possible.

Where should a water hammer arrestor be placed?

Exactly where to place the hammer arrestor will depend on the actual piping arrangement. The best places are either close to the pump, isolation or check valve that is originating the hammer, or at more distant points where the pipe changes direction, for example at the top of a pump riser.

Do water hammers work upside down?

They can be horizontal. However, you can also mount them on the washer and keep them vertical is you want.