Low Hot Water Pressure (and how to fix it quick)


Are you tired of taking lukewarm showers and struggling to get hot water out of your taps or shower head? Low hot water pressure can be a frustrating problem to deal with, but fortunately, there are several solutions you can try to fix it. In this article, we’ll explore some common causes of low water pressure, as well as some DIY fixes and professional solutions to help you restore your hot water pressure and enjoy a comfortable, consistent flow of hot water in your entire home.

Signs your hot water pressure is lower than usual

There are several signs that can indicate that your hot water pressure is lower than usual, including:

Weak or inconsistent flow

If you turn on a hot water tap and notice that the flow is weaker or more inconsistent than usual, it could be a sign that your hot water pressure is low.

Takes longer to heat up

If your hot water takes longer than usual to heat up or doesn’t get as hot as it used to, this could also be a sign of low hot water pressure.

Reduced water pressure in other areas

If you notice that your cold water pressure is still strong but your hot water pressure has dropped, it’s likely that you have an issue with your hot water heater.

Noisy pipes

If you hear banging or rattling noises coming from your pipes when you turn on the hot water, it likely indicates an issue with the hot water unit as if it happens only when the hot water is turned on.

Inconsistent temperature

If you notice that your hot water temperature fluctuates or varies between hot and cold, you will likely experience low pressure along with that

6 Quick ways to fix low hot water pressure

There are several ways to fix low hot water pressure, including:

  1. Check the shut-off valve: Make sure the main shutoff valve to your hot water heater is fully open. If it’s partially or completely closed, it can cause low hot water pressure. You can also turn the main shut-off valve on and off a few times and gently knock on the side of the valve to help break up any sediment build-up.
  2. Check for clogs: Clogs in the hot water pipes, fixtures, or valves can cause low hot water pressure. Check for sediment buildup or mineral deposits that may be obstructing the flow of hot water.
  3. Flush the water heater: Over time, sediment and mineral buildup can accumulate in your water heater, which can restrict the hot water flow. Flushing your water heater can help remove this buildup and improve hot water pressure.
  4. Install a water pressure booster: If your low hot water pressure is due to a whole house low water pressure problem, installing a water pressure booster can help increase the water pressure and improve the flow of hot water.
  5. Inspect the water pressure relief valve: If this pressure-reducing valve has popped off and water is dripping out of that pipe into the tray underneath your water heater, there is a good chance you are experiencing a sudden drop in your hot water pressure from this.
  6. Call a professional plumber: If you’re unable to identify or fix the source of the problem on your own, it’s best to call a plumbing expert. They can diagnose the ongoing problem and provide the necessary repairs or replacements to restore your home’s water pressure.
hot water heater main shut-off valve
Hot water heat main shut-off valve

Preventing low hot water pressure in your home (maintenance & care)

Flush your hot water heater regularly

It’s generally recommended to flush your water heater at least once a year to maintain hot water pressure and prolong the life of your water heater. Over time, sediment and mineral buildup can accumulate in the tank, which can reduce the efficiency of your water heater and cause low hot water pressure issues. Flushing the tank can help remove this buildup and improve the performance of your water heater.

However, the frequency of flushing your water heater may depend on a variety of factors, such as the hardness of your water, the size of your tank, and the age of your water heater. 

It’s also important to follow the manufacturer’s recommendations for flushing your specific water heater model. Some models may require more or less frequent flushing depending on their design and features.

Install a water softener

If you have hard water, which is water that contains high levels of minerals, it can cause mineral buildup in your water heater and hot water supply lines over time, leading to low hot water pressure. Installing a water softener can help reduce the mineral content in your water and prevent this issue.

Upgrade Plumbing Fixtures

If you have an older plumbing system, it may be more prone to issues such as low hot water pressure. Consider upgrading your plumbing system, including your water heater and plumbing lines, to improve performance and prevent future problems.

Check for leaks

Regularly check for leaks in your pipes, fixtures, and valves, and address any issues promptly to prevent water damage and avoid any water pressure issues.

Monitor Water Usage

High water usage during peak hours can lead to low water pressure, especially during times of high demand, such as in the morning or evening. This may be during times when you are running the washing machine, dishwasher or any other water-using appliances. Monitor your water usage during peak hours and try to limit excessive usage during these times to maintain consistent water pressure.

Adjusting the water pressure regulator to improve low hot water pressure

  1. Locate the pressure regulator: The pressure regulator is typically located near the main water supply valve where the water enters your home. It is usually a bell-shaped device that is connected to the water supply line.
  2. Test the water pressure: Before making any adjustments, test the water pressure at your fixtures. You can use a water pressure gauge to measure the water pressure. Attach the gauge to an outdoor faucet or a laundry faucet and turn on the water. The gauge will display the water pressure in PSI (pounds per square inch).
  3. Adjust the regulator: The regulator will have a screw or bolt on top that can be turned to adjust the water pressure. To increase the water pressure, loosen the bold and then turn the screw clockwise. To decrease the water pressure, turn it counterclockwise. It’s a good idea to count the turns, so you have a general idea as you adjust to the pressure you want.
  4. Test the water pressure again: Once you’ve made the adjustment, test the water pressure again at your fixtures. If the pressure is still too high or too low, you can make further adjustments until you achieve the desired pressure.
  5. Consider safety: It’s important to keep in mind that increasing the water pressure too much can be dangerous and cause damage to your plumbing system. It’s recommended to consult a professional plumber to ensure that your water pressure is set at a safe and appropriate level.

Regular maintenance and upkeep of your hot water heater and plumbing system can also prevent low hot water pressure from occurring in the first place. This includes draining the water heater annually, cleaning faucet aerators, and replacing worn-out pipes and fixtures. It’s important to service your hot water heater once a year by flushing the hot water tank to sediment build up which will lead to problems down the road like….you guessed it…low hot water pressure!

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