Water Hammer Absorber - Installation Instructions

This humidifier is supplied with a water hammer absorber that you should use in case of noise due to high water pressure.
What is Water hammer?

• Water hammer is an unpleasant noise that sounds as if someone is knocking on your water pipes with a hammer. This normal physical phenomenon happens whenever a water flow is suddenly interrupted by a quick closing valve. Most home appliances using water are equipped with such a valve, the valve relies on both an inside spring AND city water pressure to close when not energized. The water pressure guarantees that the valve will stay closed and will not leak in case of power failure.
• You can easily hear this "bang" when either the washing machine or the dishwasher finishes the filling cycle. Everyone considers this noise as part of the process and normal and you could eventually recreate this noise yourself by closing a kitchen or bathroom faucet very quickly.
• The water hammer takes place when the moving mass of water hits the valve shutter like a train crashing into a wall. A shock wave is created and it bounces back and forth several times until it finds somewhere to dissipate. The water hammer intensity depends on different factors (among them, the speed of the water flow and the speed of the valve closing process).

Working principle of this absorber
This absorber relies on the resilience of a rubber hose. The hose submitted to city water pressure expands.
When the electric valve opens, the hose "returns" to its original dimensions until the water hammer strikes.
At that time the rubber hose "expands" again, thus absorbing the shock wave by giving it space to dissipate.

How to install this Water Hammer Absorber?
A- This absorber has one end terminated by a piece of plastic tubing that has to be connected to the electric valve. Slip the brass compression nut (5) onto the plastic tube (11), then the Delrin sleeve (7) with its most tapered end towards the end of the tube. Finally, install a brass insert (8) into the end of the plastic tubing. Push the tubing fully into the valve compression fitting. Tighten the brass compression nut with small wrenches, without stripping,
using the double wrench method in order to apply the torque on the fitting only and not on the valve.

B- Install the water supply tubing on the other side of the rubber hose. That side has a compression fitting (3) to receive the supply tubing. It is also factory equipped with a water flow restrictor (4) (plastic insert) that helps to reduce both water consumption and the water hammer effect.
We recommend the use of plastic tubing instead of copper because the copper rigidity definitively does not help in case of high water pressure and water hammer. In fact, the plastic tubing being softer can move when the water hammer hits, thus absorbing a part of the energy created.

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C- Slip the brass compression nut (5) onto the plastic supply tube (6), then the Delrin sleeve (7) with its most tapered end towards the end of the tube. Finally, install a brass insert (8) into the end of the plastic tubing. If you still want to use copper tubing (not recommended) slip the brass compression nut (5) onto the copper tubing (9), then the brass sleeve (10).

D- Push the supply tube fully into the brass compression fitting. Tighten the brass compression nut with small wrenches, without stripping, using the double wrench method in order to apply the torque on the fitting only.  Then do the same operation at the other end of the supply tube and make the connection to the saddle valve previously installed on the copper supply pipe.