Boost Your Shower: How to Increase Hot Water on Delta Faucets

Virginia Jul 01, 2026

Ever found yourself shivering under a stream of tepid water, wishing you could turn up the heat in your Delta shower? You're not alone. Many homeowners struggle with this common issue. But don't worry, boosting your shower's hot water supply is easier than you think. Let's dive into a step-by-step guide on how to turn up the hot water in your Delta shower.

Delta Shower Faucet Hot Water Adjustment
Delta Shower Faucet Hot Water Adjustment

Before we begin, it's crucial to understand that the water temperature in your shower is primarily controlled by your water heater. However, there are a few adjustments you can make to your Delta shower to optimize the hot water flow. Let's explore these options.

How To Fix Reversed Hot and Cold | Delta Shower Valve
How To Fix Reversed Hot and Cold | Delta Shower Valve

Understanding Your Delta Shower's Temperature Settings

Delta showers, like many modern shower systems, often come with a built-in temperature limiter. This feature helps prevent scalding and is particularly useful in households with children or elderly residents. However, if you find the water too cold, you might need to adjust this setting.

A Guide on How to Increase Water Temperature on a Shower Valve – Baby Gizmo
A Guide on How to Increase Water Temperature on a Shower Valve – Baby Gizmo

Most Delta showers use a dial or a digital interface to control the temperature. The dial typically has markings for 'C' (cold) and 'H' (hot). If your shower has a digital interface, you'll see a temperature display and up/down buttons to adjust the setting.

Adjusting the Temperature Limiter

How To Make Shower Water Hotter?
How To Make Shower Water Hotter?

To increase the maximum temperature, you'll need to adjust the temperature limiter. Here's how:

  • For dial-type showers: Turn the dial clockwise to increase the maximum temperature. Remember, the dial's 'H' marking indicates the hottest setting, so you'll want to turn it past this point.
  • For digital interface showers: Press the up button to increase the maximum temperature. The display should show the new maximum temperature in degrees.

Be cautious while adjusting the temperature. While it's important to get a comfortable water temperature, avoid setting it too high to prevent the risk of scalding.

Tuesday Tip: Adjusting Hot Water Temp. for Showers & Baths
Tuesday Tip: Adjusting Hot Water Temp. for Showers & Baths

Checking and Clearing Lime Scale Buildup

Over time, mineral deposits can build up in your showerhead, restricting water flow and affecting temperature. If your showerhead feels clogged or the water pressure has decreased, it might be time to clean it.

To clean your Delta showerhead, follow these steps:

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Shower Not Hot - How to Fix 1-Handle Shower Temp
  1. Fill a plastic bag with vinegar, enough to submerge the showerhead.
  2. Secure the bag over the showerhead, ensuring the entire showerhead is submerged in the vinegar.
  3. Leave it overnight. The vinegar will help dissolve the lime scale buildup.
  4. The next day, remove the bag and gently scrub the showerhead with an old toothbrush to remove any remaining deposits.

If the showerhead is still not performing optimally, it might be time to replace it. Delta offers a variety of showerheads designed to optimize water flow and temperature.

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Adjusting shower water temp
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Optimizing Your Water Heater for Better Shower Performance

While adjusting your shower's temperature settings can help, the water heater plays a significant role in determining the water temperature in your shower. Here are a few tips to optimize your water heater's performance:

First, ensure your water heater is set to the right temperature. Most manufacturers recommend setting the temperature to 120°F (49°C) for optimal performance and safety. If your water heater is set lower, consider increasing the temperature.

Insulating Your Water Heater

Insulating your water heater can help maintain its temperature and reduce energy waste. If your water heater is more than 10 years old, consider wrapping it in an insulating blanket. This can help reduce heat loss and improve your shower's performance.

Remember, safety is paramount when dealing with water heaters. Always turn off the power or gas supply before performing any maintenance or adjustment tasks.

Flushing Your Water Heater

Over time, sediment can build up in your water heater, reducing its efficiency and affecting water temperature. Flushing your water heater regularly can help remove this sediment and improve its performance. Here's how:

  1. Turn off the power or gas supply to your water heater.
  2. Turn off the cold water supply valve and connect a garden hose to the drain valve at the bottom of the tank.
  3. Open a hot water faucet in your home to allow air to enter the tank and facilitate draining.
  4. Open the drain valve and allow the water to drain into a bucket or a nearby drain. Continue draining until the water runs clear.
  5. Close the drain valve and remove the hose. Turn the cold water supply valve back on and restore power to the water heater.

Regular flushing can help maintain your water heater's efficiency and ensure optimal shower performance.

In the end, optimizing your Delta shower's hot water supply is a combination of adjusting your shower's temperature settings, maintaining your water heater, and ensuring your showerhead is clean and clear. With a little effort, you can enjoy a comfortable, relaxing shower every time. So, go ahead, turn up the heat, and enjoy your perfect shower experience!