How to Clear a Shower Water Supply Line How to Clear a Shower Water Supply Line

What You'll Need
Water Valve Key

When working with the plumbing of your shower, you may be required you to clear the water out of the water supply lines before starting your project. You will need to know how to remove the water from the supply lines whether you are repairing the lines due to damage, replacing the lines or even just replacing the faucets and hardware.

Step 1 – Shut Off Water

The first step to clearing the water supply lines to your shower is to turn off the water. Some plumbing projects may allow you to turn off the water to a specific fixture such as shutting off the water valve to a sink or toilet. However, in other cases such as this one dealing with a shower, you will need to turn off the water to entire home. In this instance, you need to locate the main water valve to the home that is typically located inside the water meter. You may have to utilize a valve tool, also called a water valve key, which you can purchase at any local hardware store to turn the valve off.

Step 2 – Clear Out the Water

Next, you are ready to clear the standing water out of the water supply lines so you can dig into your shower plumbing project. The first step is to turn on a faucet at the highest point in your home. If you have a two story home, turn on a faucet in the farthest part of the house on the second floor. If you have a one story home, turn on a faucet in the farthest part of the house away from the water main. You need to empty the water in the lines to the toilets. You can flush the toilets a few times each to remove all of the water from the tanks and reservoir.

Step 3 – Let All Water Drain

You need to leave the faucets turned on until there is nothing but a varied drip of water coming out of them. This could take a while to happen because you will be draining the water from the lines and the water heater tank as well. After the water has slowed to a very infrequent drip, you have drained all of the water from the supply lines and can begin your shower plumbing project as planned.

Tips

If you are working on one particular fixture or appliance, such as a dishwasher or toilet, you may not need to drain all of the water in the supply lines for the entire home. Most fixtures such as these have their own water supply valve. You can turn off the water supply valve to the specific fixture without needing to shut off the water to the entire home. Once you have shut off the water to the fixture or appliance you only need to drain the water from that specific supply line. Therefore, if working on a toilet, you would need to flush the toilet to remove the water from the reservoir and the supply line between the toilet and shut off valve. However, when working wit the plumbing of a bathtub or shower, it is best to shut off the water to the home and empty all water from the supply lines before you begin your project.

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