A sink valve is an important plumbing unit that helps control the flow of water going to a faucet. Water that is supplied makes its way to households via the main water supply line. It is comprised of a series of pipes that bring water to every faucet or tank inside and outside the home. Pipes are usually divided into two types, hot and cold water supply, and can be made of copper, PVC or galvanized iron. The water that runs through these pipes is controlled by a series of valves, and a sink valve is one type of valve found just under the sink. Over time, the sink valve may develop a number of problems. Here are the most common ones.
Corrosion is one of the worst problems that homeowners encounter with sink valves and pipes. The corroded piece is usually unnoticed until it causes problems with water that goes to the faucet. One of the obvious signs of corrosion is discoloration. This problem can be seen on the outside of the valve, but only when the corrosion is at its worst. When a sink valve is corroded, it has to be replaced with a new one as soon as possible.
2. Valve Is Stuck
Sink valves can get stuck for a number of reasons. One of the reasons is related to rust build-up. When galvanized valves are oxidized, they form a dark orange residue known as rust. Its build-up can cause the valve knob to get stuck. If this happens, you can loosen it with the help of a wrench or pliers. Another reason why the valve gets stuck is over-tightening of the knob itself. When the knob has been shut too tight, the homeowner may have difficult time turning it loose. Corrosion is also a likely cause. When a corroded valve gets stuck, it must be replaced with a new one.
3. Shrieking Noise
Irritating noise can result from problems with the valve as well. This noise can be due to two probable reasons. One is that the rubber gasket which restricts the flow of water has become brittle. Thus, it cannot stop the flow of water. When pressure pushes water into the valve, you may hear a strange irritating noise. This problem can be fixed by replacing the rubber gasket with a new one. A defective sink valve may also be the culprit. If there are no other reasons that may cause the shrieking sound, the valve itself may have been damaged by water pressure. Change the valve with a new one to solve the problem.
Leaks can result from direct damage to the valve or through other processes such as corrosion. Leaks are quite obvious as they show signs right away. When water drips down the valve, make sure that you tighten the fittings and joints. If this does not solve the problem, probably, the valve has been corroded and needs to be replaced.