Moen A112.18.1m Shower Head Disassembly

Disassembling a Moen A112.18.1M shower head, a common plumbing fixture, often becomes necessary for cleaning mineral deposits or replacing worn components. This document outlines a general procedure based on observable design patterns, emphasizing caution and proper tool usage.

Initial Assessment and Preparation

Begin by visually inspecting the shower head. Note any visible screws, connection points, and the overall assembly style. Documenting the initial state with photographs can aid in reassembly.

Gather necessary tools: adjustable wrench, pipe wrench (optional), penetrating oil (e.g., WD-40), soft cloths, a small container for parts, and possibly a set of screwdrivers (Phillips and/or flathead, depending on the model). Having appropriate tools minimizes the risk of damaging the shower head.

Turn off the water supply to the shower. This is generally accomplished by shutting off the main water valve or individual shut-off valves located near the shower fixture. Failure to do so will result in water damage during disassembly.

Detaching the Shower Head from the Shower Arm

The initial step usually involves detaching the shower head from the shower arm. Locate the connection point, typically a threaded connection secured with a nut.

Use an adjustable wrench to loosen the nut connecting the shower head to the shower arm. Apply the wrench to the nut, ensuring a snug fit to prevent slippage and damage to the finish. Turn the wrench counterclockwise to loosen. If the nut is excessively tight or corroded, apply penetrating oil and allow it to soak for several minutes before attempting to loosen again.

Once the nut is sufficiently loose, carefully unscrew the shower head from the shower arm by hand. If resistance is encountered, avoid forcing the connection. Reapply penetrating oil and try again. Protect the finish of the shower arm with a soft cloth placed between the wrench and the arm if using a pipe wrench for additional leverage. Avoid excessive force, which can damage the threads or the shower arm itself.

After detaching the shower head, inspect the shower arm threads for any damage or corrosion. Clean the threads with a wire brush if necessary and apply Teflon tape before reattaching the shower head later.

Disassembling the Shower Head Body

Identifying Fasteners

With the shower head detached, examine the body for visible fasteners. Many Moen shower heads utilize screws, snap-fit components, or a combination of both. Some models may have concealed screws located beneath decorative caps or labels.

Carefully pry off any decorative caps or labels using a small, flathead screwdriver. Exercise caution to avoid scratching the finish. Once the caps are removed, identify the type of screws and select the appropriate screwdriver.

Removing Screws and Outer Components

Using the correct screwdriver, carefully remove any visible screws. Store the screws in a small container to prevent loss. As screws are removed, note the order and location of any components that are loosened.

Once all accessible screws are removed, gently attempt to separate the shower head body. If the body does not separate easily, inspect for additional hidden fasteners or snap-fit connections. Do not force the separation, as this may damage the internal components.

Dealing with Snap-Fit Connections

Some Moen shower heads employ snap-fit connections to secure the body halves. These connections typically consist of small plastic tabs that interlock. To disengage these tabs, use a small, flathead screwdriver or a plastic pry tool to gently pry the body halves apart. Apply pressure near the snap-fit locations, working your way around the perimeter of the shower head.

Pay close attention to the location and orientation of the snap-fit tabs to avoid breaking them during disassembly. Excessive force can easily damage these delicate components, rendering the shower head unusable.

Accessing Internal Components

After separating the shower head body, the internal components, such as the flow restrictor, spray plate, and associated seals or O-rings, will be accessible. Document the arrangement of these components before proceeding further.

Cleaning and Inspection

With the shower head disassembled, inspect all components for mineral buildup, corrosion, or damage. Clean mineral deposits using a solution of vinegar and water. Soak the components in the solution for several hours or overnight to loosen the deposits.

Use a soft brush or cloth to remove any remaining mineral deposits. Rinse all components thoroughly with clean water and allow them to dry completely before reassembly.

Inspect the spray plate for clogged nozzles. Use a small needle or pin to carefully clear any obstructions. Avoid using excessive force, which can damage the spray plate.

Examine all seals and O-rings for signs of wear or damage. Replace any worn or damaged seals to prevent leaks after reassembly. Moen provides replacement parts for many of its shower heads.

Reassembly

Reassemble the shower head in the reverse order of disassembly. Refer to the photographs or notes taken during disassembly to ensure proper component placement.

Carefully align the body halves and snap them together. Ensure that all snap-fit connections are securely engaged. Reinstall any screws that were removed, tightening them to a snug fit. Avoid over-tightening, which can damage the plastic components.

Apply Teflon tape to the shower arm threads. Screw the shower head onto the shower arm, tightening the nut with an adjustable wrench. Again, avoid over-tightening.

Testing and Verification

Turn the water supply back on and check for leaks at the shower head connection and around the shower head body. If leaks are detected, tighten the connections or replace any worn seals. Monitor the shower head for several days to ensure that it is functioning properly.

Key Takeaways

• Document Everything: Take pictures before and during disassembly to aid in reassembly.
• Use the Right Tools: Employ appropriate tools to prevent damage to components.
• Penetrating Oil is Your Friend: Use penetrating oil on stubborn connections.
• Gentle Force: Avoid excessive force, especially with snap-fit connections.
• Replace Worn Parts: Replace worn seals and O-rings to prevent leaks.
• Test Thoroughly: Check for leaks after reassembly and monitor performance.