Question about Delta T13420 Chrome Classic Single Handle Monitor Pressure Balanced Tub and

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Water is warm not hot. How do i adjust the scorch guard?

Need to know how to breakdown this model and find the scorch guard feature. Need to adjust it for warmer water output?

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  • Anonymous Dec 30, 2008

    I have already tried to adjust the plastic device but still not getting any hot water only luke warm. When I turn the water on in the tub then the water in the shower will get hot enough to take a bath?

  • airhound1 Feb 28, 2009

    I have an older Delta single-handle shower/tub faucet. Showers are tepid. Other showers in huse are fine. When I dissamble the valve, I fin: retaining ring, a white plastic ball with several holes in it onto which is attached the handle. All of this is in a brass valve hosuing with tow outlets containing rubber gaskets and springs. I see no adjustment possibilities. What do I need to do to increase hot water flow through this valve to the shower head and bath outlets? Thanks. airhound1@cox.net

  • Anonymous Mar 23, 2014

    the temperature of the water is not even warm

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  • 33 Answers

Here is the breakdown of the model number shown:

Delta T13420


The way to adjust the temperature is by this:

  1. Get a pocket thermometer.
  2. Turn on the water to the hottest setting.
  3. Remove handle.
  4. Check the temperature with the thermometer. (adjust to your liking, scald begins above 100 f)
  5. Set temperature by removing and rotating the plastic piece just below the handle left or right until the desired temperature is achieved.
  6. Replace handle.
This should do it.

Hope this helps and please rate this!



Posted on Dec 08, 2008

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1 Answer

When turning on the hot water on dedicated hot water faucets, the water is almost scalding. However, when turning on the shower and tub that has only one faucet handle (mixes cold and hot) and put the...


Pull apart the front of the valve and there is a limiter that is set to limit hte hot water, you need to adjust that limiter. I find many valves are shipped with teh setting too cold.

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Wateris not hot enough, need to know how to adjust scauldgard on faucetto getmore hot water, and less cold.


Assuming that you have sufficient hot water, you need to adjust the Scald-Guard valve. It's usually quite easy to do. The intent is to limit the amount of hot water that can be fed to to shower head or tub spout. On the 1300/1400 series faucents there is a disk behind the faucet knob/lever called the rotational limit stop. Remove the knob/lever, either by popping the cover off the knob and removing the screw with a Philips head screw driver, or removing the handle with an allen wrench. Next adjust the rotational limit stop disk clockwise to increase the limit on hot water flow. Delta claims each tooth you click past clockwise will increase the maximum water temperature by 6 degrees F.

Delta has a great FAQ on their web site. As of Jan 30, 2011, this link is valid:
http://www.deltafaucet.com/customersupport/faq/Water+Temperature/

If the rotational limit stop disk is already turned to the maximum point (clockwise), then you may have a hot water flow problem (either with the cartridge or to or in the manifold). The cartridges require a little more know-how to replace. You'll need to shut off the main water valve prior to removing the old cartridge. There are a couple of places that detail how to replace and/or service the cartridges, including a short video on youtube. I can post more details on this if you find you need to replace the cartridge.

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Once dial in place slide handle on and turn on to check water temperature.

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My delta 132900 gets too hot.


With these Faucets, you can remove the handle and make adjustments to the max Hot water setting (scald guard).

You may also have a faulty or lime-covered cartridge.

SEE THIS SITE for making adjustments/replacing the cartridge.

Thanks for using FixYa - a 4 THUMB rating is appreciated for answering your FREE question.

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you need an allen key to remove the handle once the handle is removed than you need to turn the grey plastic temp guide counter clockwise as far as possible

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Not enough hot water


Some higher end models do have an adjustment that is behind the face plate. You would have to remove the handle and the screws in the faceplate to expose them. If you have adjustments they will be located on the brass valve body facing you. You will need a flashlight and a flathead screwdriver to make the adjustment. If your model is not equipped with adjustments you could have a faulty valve stem. The stem is comprised of a rubber band like gasket that separates port holes into which the waters flow. There could be some piece of trash blocking the port not allowing adequate water from the hot side into the valve.Some valves stems are also able to be installed upside down causing the same issue as the ports do not rotate fully to allow adequate supply. However you say that you have adequate pressure on the hot side but not warm enough. There is another possibility also based on the way the shower supply was plumbed but there is no need to go into this unless this does not resolve your issue. I hope this is of assistance and thanks for using Fix Ya. Please let me know if I can be of further assistance.

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