How to Install Grohe Shower Valve?

Whether you are replacing a worn-out shower valve or installing a new one, the steps for the installation process are relatively similar. This article provides a detailed guide on how to install a Grohe shower valve.

Installation of a Grohe shower valve involves several steps that require plumbing knowledge, tools, and materials. Whether you are replacing a worn-out shower valve or installing a new one, the steps for the installation process are relatively similar. This article provides a detailed guide on how to install a Grohe shower valve.

Preparing for the Installation

Before you begin installing the Grohe shower valve, ensure that the water supply to the bathroom is turned off. Additionally, check that the hot water feed and cold water feed are in the correct location.

If you are undertaking a significant home project, consider flushing out the water network of impurities. Gather all the tools, materials, and parts required for the installation.

Some plumbing suppliers or hardware stores may have a list of recommended tools to purchase or rent. Ensure to go through the installation instructions provided by the manufacturer to avoid any confusion.

Locating the Position

First things first, you gotta punch a hole into the wall behind the faucet. You can do this by sliding a long screwdriver alongside the spout nipple of the tub and then giving it a good push.

Now, if you have an access panel in the next room behind the faucet, great! You can work inside the wall with no problem. But if you don’t have one, you can install your new Grohe shower valve by cutting a hole in the shower surround.

However, it’s best to install a paintable plastic panel behind the faucet to keep things looking nice and tidy. You can get these  in various sizes at plumbing suppliers or nearby hardware stores.

But if you don’t want to install a panel because it’s an eyesore, you can opt for an oversized cover plate.

If you’ve already got an access panel, but it’s too low to give you easy access to the faucet, slap another one above it, and you’re golden.

When positioning the access hole, don’t bother with measurements. Remove the faucet handle or tub spout and punch a marker hole through the wall.

If you’ve got a plaster wall instead of drywall, you can use a drill with a long bit instead of a screwdriver.

But, before you cut a hole the size of your panel, cut a smaller hole first to see exactly where your valve and pipes are located. Once sorted, you can position the full-size hole for the best access. Trust me; you don’t want to cut a hole in the wrong spot and have many headaches.

Mounts and Connectors Installation

Step 1: Positioning the Holes First, you want to ensure your holes are in the right spot. So, screw those S union connectors into the fittings in the wall and make sure they stick out about 42 millimeters. Then, screw those escutcheons in place.

Step 2: Adjusting the Spacing Now, adjust the spacing between the centers of the escutcheons so that there are about 150 millimeters between them. Please make sure they’re level and adjust as needed.

Step 3: Installing the Mixer Alright, it’s time to install that mixer. Firmly tighten it in place, but make sure those nuts aren’t touching the escutcheons. Check the horizontal positioning and make any necessary adjustments.

Step 4: Final Check Now that everything is in place, you can go ahead and dismantle everything. But, make sure to take note of the depth between the wall and the S union connectors. That way, you can easily put everything back together if needed.

Install a Thermostatic Mixer for Your Shower

  1. Seal the thread of the S union connector with PTFE tape, wrapping it in the tightening direction. Use a 22-millimeter open-end wrench to tighten the connector properly.
  2. Adjust the connector to ensure that there is a 150-millimeter center-to-center space, using the same depth you noted earlier. Use a spirit level to check if the connector is level.
  3. Apply a silicon seal between the eccentric connectors and the wall, then screw the escutcheons onto the S union connector.
  4. Remove the blue and red caps from the mixer and check that the filters are correctly placed, with the rounded side facing inwards. Place the mixer on the connector without any extra seal and tighten the nuts with a 32-millimeter open-end wrench.
  5. Use a spirit level to check if the mixer is level, and make adjustments if necessary. Then, turn the water supply back on to the mixer and check for leaks.

Adjusting the Thermostatic Mixer

Checking the water temperature is an important step to ensure that the thermostatic mixer is functioning properly. Use a thermometer to check if the 38-degree-Celsius handle guide aligns with the corresponding temperature marker on the shower body.

If it does, then you are good to go without making any necessary adjustments. However, if an adjustment is required, start by closing the water evacuation outlet and then remove the mixer handle cover using a small flat-head screwdriver.

Turn on the water and adjust the cartridge by rotating the notched black element to a temperature point of 38 degrees Celsius. Once the adjustment is done, put the handle back in place with the guide pointing to the same temperature and then screw it in tightly, followed by the cover.

Completing with Finishing Touches

Ensure that the hose seal is in the right position, then screw its end onto the mixer. Turn the water supply back on to ensure the showerhead is functioning correctly.

Safety Precautions

When installing a Grohe shower valve, always clean copper pipes and remove any burs or solder before installation. It is also essential to sand the pipes with a sanding tool to remove any rough edges before installing the threaded connectors.

Be cautious when using a torch, and have a spray bottle or fire extinguisher on hand to extinguish any flames.

Always cut a marker hole on the wall and use it to gauge the location of the valve and pipes. Finally, check for leaks after installation and inspect for any defects that may result in further complications.

How do you disassemble a Grohe shower handle lever?

Disassembling a Grohe shower handle lever can be a tricky process, but with the right tools and steps, it can be done quickly and easily. Here are the steps you can follow to disassemble a Grohe shower handle lever.

Step 1: Turn Off the Water Supply

Before starting any disassembly work, it is important to turn off the water supply to the shower. This can be done by closing the incoming water line in the home. Once the water supply is turned off, you can proceed with the disassembly process.

Step 2: Locate the Set Screw

The set screw on a Grohe shower handle lever is usually a small, round screw located on the side of the lever, underneath the handle lever, or on the side of levers with a round base. To locate the screw, you may need to feel around the handle or use a flashlight to see it clearly.

Step 3: Unscrew the Set Screw

Once you have located the set screw, you will need to unscrew it using an Allen wrench. Insert the wrench into the screw head and turn counterclockwise until the screw is no longer tight. Be careful not to strip the screw head or force it too much, as this can cause damage to the lever.

Step 4: Remove the Set Screw

Once the screw is completely unscrewed, you can remove it and set it aside in a safe place where you won’t lose it. You may need to use pliers or tweezers to pull the screw out of the handle if it is difficult to remove.

Step 5: Slide the Handle Off

With the set screw removed, you can now pull on the handle to slide it backward and off of the faucet stem. If the handle is difficult to remove, you may need to wiggle it gently or use a pry tool to loosen it.

It is important to note that the specific steps to disassemble a Grohe shower handle lever may vary depending on the model and design. Some shower handles may have visible screws that must be unscrewed with the appropriately sized hex key.

In summary, to disassemble a Grohe shower handle lever, turn off the water supply, locate the set screw, unscrew the set screw using an Allen wrench, remove the set screw, and slide the handle off the faucet stem.

Following these steps carefully and patiently will allow you to disassemble the shower handle lever successfully.


Although installing a Grohe shower valve may require some plumbing knowledge, following the manufacturer’s instructions and using recommended tools and materials guarantee a successful installation.

Replacing a worn-out shower valve or installing a new one can be an essential home project that adds value and updates your bathroom’s interior design. With the correct tools, materials, previous measurements, and steps, you can avoid mishaps and enjoy the benefits of using a Grohe shower valve.



  • vikram-2-1 How to Install Grohe Shower Valve?

    My name is Vikram and I have a genuine passion for plumbing and faucets. I've spent countless hours researching and experimenting with different techniques and products to find the most effective solutions for common plumbing problems. My goal is to share my knowledge and experience with homeowners, so they can save time, money, and stress by tackling plumbing issues themselves.

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