Tub Shower Diverter Stem Problems
A shower diverter is a very important pipe and valve assembly that fits on all bathtubs that have shower heads. This diverter is located at the knob that you turn, pull, or push to switch the water from the faucet to the shower itself. The job of all diverters is to close off one section of pipe to water so that the pressure can move the water up to the shower head. In bathtubs that have two knobs for hot and cold water, the shower diverter also makes sure that the hot and cold water combine correctly. Over time, the diverter may begin to fail.
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Rust
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While shower diverters--and all pipes in a bathtub--are made out of strong, wear-resistant metals, some rust is eventually unavoidable, because of the constant exposure to humidity and water. Most of the rusting will probably occur on the outside of the diverter, where it is connected to the knob or plate and has the most chance of being exposed to water. While this does not necessarily compromise the diverter's function, it can make it very difficult to make repairs, because the rust often seals the knob shut over the screwing mechanisms that keep it in place.
Accessing Diverter Because of Rust
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You may find that when you need to access the shower diverter, you must use a wedge or hammer to pry off the main components of the knob away from the diverter. If the damage is worse, the diverter itself may need to be replaced. Sometimes the application of oil can help in releasing parts stuck because of rust.
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Leaks
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One of the worst shower diverter problems is a leak. Often, these leaks occur on the inside of the diverter, where it meets the main plumbing line that supplies water to the bathtub. This causes water to drip down on the inside of the bathtub where it has easy access to the walls and subfloor. This can create mold problems and water damage without you even noticing before it is too late.
Old Pipes
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Many shower diverters fail because of age. The pipes lose their stability and, due to rust and other factors, develop common problems such as in-faucet leaks, where a certain amount of water still flows in the faucet even when the diverter is channeling water to the shower head. This does not mean the pipes are damaged, but that their seals and positions have been compromised.
Part Replacement
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When a shower diverter needs replacement, you may have a problem finding the correct diverter type. Diverters vary from shower to shower, and different kinds are needed based on your plumbing. The part you need no longer may be available--a common occurrence with diverters, which tend to last many years.
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