When the spray head is not in use, pressure is equal on both sides of the piston so the valve allows all water to flow past it and out through the regular faucet spout. However, when the lever or valve is pressed to activate the spray, an imbalance of pressure is created inside the diverter assembly (more pressure on one side of the piston than on the other) and this causes the piston to move down and close the opening leading to the faucet spout. All water then flows through the hose that leads to the spray head (in some cases a small trickle of water will continue to flow out of the faucet spout).
If the water is not diverted to the spray head when you press down the spray lever or button, so that most of it is still coming out of the faucet spout, the first thing you should check is the strainerand-aerator assembly on the end of the faucet spout. Dirt or sediment in this unit could be creating a back-pressure that keeps the diverter valve inside the faucet from operating properly.
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The simplest way to check for this is to take the aerator completely off (it unscrews easily). Then try the spray again with this off. If the spray now works fine, then you know the aerator needs cleaning or replacing – chances are the little screen on the inside may be partly clogged with dirt, or sediment may have become caked inside the little holes around the inside rim of the aerator. You can usually clean it by holding it upside down under a strong stream of water to backflush it. But if you can’t get it really clean, replace it with a new one.
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When your test (without the aerator) indicates that this is not the source of the problem, the next thing to check is the openings on the spray head itself to see if it is clogged or broken. Usually the nozzle can be unscrewed so that you can clean it by running water through it in reverse; otherwise you may be able to clean the holes out with a round wooden toothpick. If you are unable to clean it out, or if the head is cracked or broken and therefore leaks when in use, then you should replace it with a new one. The old one can be unscrewed from the end of the hose, and the new one screwed on its place.
If neither the faucet aerator nor the spray head is the cause of the trouble, the next item you should suspect is the hose under the sink that connects the faucet body to the spray head. Make sure it is not binding or kinking when you pull the spray head up out of its socket on the sink top, and make sure the hose is not split or cracked at any point. If it is, buy a new one and replace it (the hose has a threaded fitting at each end, so it is not difficult to unscrew).
Source: https://gardencourte.com
Categories: Kitchens
