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The hot and cold shower knobs open and close the valves that release and stop the water flow. Water will continue to flow from the shower head if the washers or other internal parts of one or both of those valves have become damaged or excessively worn. Repair may be as (relatively) easy as replacing a washer, or it may mean replacing other internal parts. Usually it's not necessary to replace the entire valve, which is a good thing, because that's very hard in a finished house. You'll be able to tell which valve needs repaired according to whether it's the hot or cold water that's still flowing. (If this is a tub shower and the symptom is that warm water comes from the shower head even when the diverter valve is set to tub, then that diverter valve is likely the one with the problem.) Do-it-yourself Plumbing repair books at hardware stores and home centers have good guides on doing water valve repairs. Some detail on older faucets:
Older and inexpensive faucets use rubber washers, on the end of the valve stem, to stop the water flow. The valve stem is the spindle that projects out of the valve and onto which the handle is attached. On the other end of the valve stem, inside the valve, this rubber washer is attached by a screw through the center. Tightening the handle presses the washer against a valve seat. Water is attempting to flow through the hole in the center of the valve seat, and it's the washer that stops it. When the washer is worn, it's hard to make a tight seal. The washer may become so worn, though, as the user tightens the handle down more and more, that it simply breaks away. At this point, you have metal against metal, the valve stem grinding on the valve seat. This may grind away or chip the valve seat. Then even a new washer may not be able to properly stop water flow. When you're replacing rubber washers, examine the valve seat. If it's not unbroken and perfectly smooth, replace it too. Otherwise, not only might water still leak, but the new washer will be quickly ruined.
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Can installing a new water heater cause a pipe in the shower to leak?
If you have a new pressurised water system there is a possibility that the added water pressure could cause a leak.
What could cause hot water in an upstairs bathtub to trickle but cold water run fine?
Bad shower valve.
What you can do to use less water?
we can save water by turning off the Fauset and taking a short shower.
You have lost hot water pressure in your shower but not in your sinks what would cause this?
A dirty or clogged screen can cause the low water presser remove shower head and clean. If not it could be calcium deposits built up on shower head if so soak shower head in a cleaning solution for several hours if that dose not work buy a new shower head. (note some shower heads have a low flow re-stricter in some cases you can remove this and get more water pressure)
What causes hot and cold water to surge through the shower head?
A malfunctioning water heater can cause hot and cold water to surge through the shower heat. A faulty water pump can also cause this problem.
What could be wrong if when you are showering and another faucet is turned on the shower water cools?
Its a loss in water pressure to the shower.
What would cause low pressure in a shower when you have replaced the hot water line out of the water heater?
you have trash in your line take the shower head off and remove trash or possibly in water valve at shower
If you smoke cigarettes in the shower will it still smell?
It will not work to smoke while in shower as the water will turn off the cigarette or cigar.
How do you prevent water leaking from bathroom floor when turning on the shower?
Well the first thing to check is that the shower door or curtain is closed. Secondly you can check that the sealent on the frame of the shower is in good order.
What causes a whistling noise coming from the shower faucet the faucet to fill the tub the whistling is constant Any ideas on how to fix it and if it going to cause serious problems?
A whistling noise coming from the shower faucet or when filling the bathtub could mean that there is excess air in the water line. This can be fixed by turning off the major water supply valve and then opening all of the faucets in the home for about 5 minutes. Shut all of the faucets off, then turn the water supply back on.
Why is the water in shower not hot?
Could be water-heater problems or faulty valve.
What would cause the shower head to leak when the shower pin is not pulled?
Seats in the main valve body are leaking by, allowing water to go to the shower head.
