What side is cold water on shower valve

Few things are more frustrating than looking forward to a warm, relaxing shower after a long day, and instead having to endure an oscillating stream of scalding and glacial water because something to do with the temperature is all messed up. But before you go tearing your shower head out of the wall and calling up a plumber, there are a few things you can do to hopefully get your water temperature back to normal. Here they are, per Paul Abrams, of Roto-Rooter, and Bailey Carson, of Handy, an online marketplace for cleaning, installation and other home services.

Wait a While
The most obvious cause of fluctuating water temperatures, according to Abrams, is simply “running low on hot water from the water heater.” He says, “This happens if you’re last in line for a shower at your house, or if you have an undersized water heater. One thing I learned at my in-laws’ house is that my father-in-law likes to stick it to The Man and remove the water flow restrictor in the shower head, which means water is pushing through much faster than it’s supposed to, and it quickly depletes the supply of hot water in the tank. When hot water starts running out, we users tend to turn the handle to a hotter setting in desperation, and we get very hot or very cold water and decreased bandwidth in the warm range.” So, if someone showered before you, wait a little while so the water heater can fill back up.

Adjust Your Mixing Valve/Scald Guard
“In most instances, your scald guard — a plastic disk with notches — simply needs to be adjusted,” says Carson. “To adjust the water valves and scald guard, the single handle can be easily removed by loosening the screws with a wrench and lifting from the faucet. You’ll want to adjust the dial of the temperature controls accordingly to balance out the hot and cold water valves.” You can see exactly how this is done, with two different kinds of knobs, in the videos below.

Abrams warns, however, that you should take it slow when adjusting your scald guard, or else you could end up making the water temperature dangerously hot. “It’s important to note that faucets are set at the factory to a safe setting to prevent scalding, which is especially important to remember if you have babies, children and elderly people in the house,” he says. “This adjustment is the last safety device to prevent you from scalding yourself, and it was no doubt put in place after some expensive lawsuits were filed against faucet manufacturers. If you adjust this device, do so in one or two tiny increments at a time, then test the water temperature with your hand. Being a tough guy and pushing the setting all the way to the hot setting is a recipe for disaster, especially if your water heater is already set too hot — water heaters should be set to 120 degrees Fahrenheit, but many people crank them up much higher.”

Replace the Faucet Cartridge Altogether
If, when you go to tweak the scald guard, you notice that the whole thing is looking worn down, you should probably go ahead and replace the whole cartridge. “With usage and time, these cartridges will fail,” Abrams says. “If your shower has no warm range, but goes from very hot to very cold, it’s probably time to replace that faucet cartridge. Many manufacturers guarantee their cartridges for life, and they’ll ship you a new cartridge for free. However, switching out the cartridge isn’t something every person is willing to try. Often, it’s a simple job, but if the cartridge is crusted over with hard water deposits, or it’s been in there for years, getting it out with a pliers can prove to be very difficult.”

So, if changing the cartridge yourself is too much trouble, as Carson says, “Let a professional handyman handle it for you.” Which will be especially necessary if you did end up tearing your shower head out of the wall, after all.

At this time of year, hot showers are valued and many homeowners change the temperature of their hot water heater to reflect their desire for warmth. Still, some homeowners find it difficult to find the perfect equilibrium in their hot water heater, and the result is a shower or bath that runs too hot or too cold. Other baths and showers simply run too hot or cold, regardless of the hot water heater temperature. There are several options for solving this problem.

Adjust the Hot Water Heater Temperature

It’s possible your shower runs hot or cold because you just haven’t found the right temperature setting for your hot water heater. In general, 120 degrees Fahrenheit is considered to be the magic number for hot water heaters. This temperature is warm enough to stem the growth of bacteria in the hot water heater, and also warm enough to reach a perfect hot temperature in your shower.

In homes with young children or elderly occupants, 120 degrees may be too hot. Homeowners living with young children or elderly relatives should consult with a physician before changing the temperature on the water heater.

On some hot water heaters, adjusting the temperature is as easy as turning a dial. However, on other hot water heaters the temperature setting is hidden behind a panel. Follow these steps to remove the panel and adjust the temperature in your hot water heater to a toasty 120 degrees.

Materials:

• Philips head screwdriver
• Flat head screwdriver

Process:

1. Turn off the power to the hot water heater by flipping the corresponding circuit in the circuit breaker.
2. Use the phillips head screwdriver to remove the panel covering the temperature dial on the water heater. This panel cover will likely be marked to indicate that it covers the temperature dial.
3. Remove the insulation behind the panel cover.
4. Use the flat head screwdriver to adjust the temperature setting.
5. Replace the insulation and panel cover on the hot water heater.
6. Turn on the power to the hot water heater.

Adjust the Shower Valve

The mixture of hot water and cold water available in a shower or tub can be adjusted at the shower valve stem, the part found under the faucet. The exact process for adjusting the hot and cold water will depend on the type of faucet in your shower or tub, but the general idea is as follows:

1. Remove the handle. You may need a screwdriver to do this.
2. Take off the metal cover beneath the handle, exposing the valve stem. You’ll see a plastic part around the valve stem. This plastic part is known as the “rotational stop limit,” (RSL). This is the part of the shower that controls the mixture of hot and cold water coming out of the faucets. The directional controls will probably be noted on the RSL, but in general a counter-clockwise turn will release more hot water, and a clockwise turn will release less hot water. To turn the RSL, you may have to pull out the RSL cover to reveal the teeth that hold the RSL in place.
3. Turn the RSL two notches in whichever direction desired, then put the RSL back in place.
4. Replace the faucet handle, then test the mixture of hot and cold water. If the mixture is still not correct, repeat steps 1 through 3.

There are several videos on YouTube that document this process. We’ve posted one below:

For more information for your specific faucet, look in the manual that came with your faucet. If you don’t have the manual (many people don’t), you can likely find directions or a video online by typing the model of your faucet into a search engine along with the keywords “adjusting rotational stop limit.”

Resources

In addition to the YouTube videos above, there are several online resources that may help you adjust the hot and cold water in your shower or tub. Here are a few:

• Handyman How To: This online resource includes a very useful step-by-step tutorial with a helpful picture and an informative section about water temperatures as they relate to bacteria and scalding danger.
• Apartment Therapy: This website has a very lengthy explanation about the best temperature for water heaters and how to prevent children from being scalded.

Note that if you’re installing a new faucet, the rotational stop limit may be at the coolest setting for liability reasons.

When in doubt, you can always contact a plumber to help you adjust your shower’s hot and cold settings. Residents of the Pittsburgh area can call Terry’s Plumbing. We’re happy to make any necessary adjustments to your faucets or water heater.