
Replacing a Symmons shower tub spindle and diverter can seem daunting, but with the right tools and a clear understanding of the process, it’s a manageable DIY task. The spindle and diverter are essential components that control water flow and temperature, and over time, they can wear out or become damaged, leading to leaks or reduced functionality. This guide will walk you through the step-by-step process, from identifying the correct replacement parts to reassembling the shower valve, ensuring your shower operates smoothly and efficiently once again. Whether you’re a seasoned DIY enthusiast or a first-timer, this tutorial will help you tackle the job with confidence.
| Characteristics | Values |
|---|---|
| Tools Required | Screwdriver, pliers, adjustable wrench, utility knife, replacement parts |
| Replacement Parts | Symmons shower tub spindle, diverter, O-rings, washers |
| Steps | 1. Turn off water supply. 2. Remove handle and escutcheon. 3. Extract spindle and diverter. 4. Install new parts. 5. Reassemble and test. |
| Difficulty Level | Moderate |
| Time Required | 30-60 minutes |
| Common Issues | Leaks, worn-out O-rings, mineral buildup |
| Safety Precautions | Ensure water is off, wear safety gloves |
| Compatibility | Specific to Symmons shower tub models |
| Cost of Parts | $20-$50 (varies by model and retailer) |
| Maintenance Tips | Regularly clean aerators, check for leaks |
| Warranty Check | Verify if parts are under warranty before replacement |
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What You'll Learn
- Gather Tools and Parts: Collect adjustable wrench, screwdriver, replacement spindle, diverter, and Teflon tape
- Shut Off Water Supply: Locate and turn off the main water valve to prevent leaks
- Remove Old Spindle: Unscrew handle, pry off trim, and extract the worn-out spindle
- Install New Diverter: Insert new diverter, secure with screws, and ensure proper alignment
- Reassemble and Test: Reattach handle, turn on water, and check for leaks or proper function

Gather Tools and Parts: Collect adjustable wrench, screwdriver, replacement spindle, diverter, and Teflon tape
Before diving into the replacement process, it’s crucial to assemble the right tools and parts to ensure a smooth and efficient repair. An adjustable wrench is your go-to for loosening and tightening nuts and fittings, while a screwdriver—preferably Phillips and flathead—will handle screws and covers. The replacement spindle and diverter are the stars of this project, specifically designed for Symmons fixtures to guarantee compatibility. Teflon tape, often overlooked, is essential for sealing threads and preventing leaks. Without these items, you risk incomplete repairs or additional trips to the hardware store.
Consider the adjustable wrench as the Swiss Army knife of plumbing tools—versatile and indispensable. Its ability to adapt to various sizes of nuts and bolts makes it ideal for tight spaces like shower valves. When selecting a screwdriver, ensure the tips match the screws on your fixture; mismatched tools can strip screws, complicating the process. The replacement spindle and diverter should be exact matches for your Symmons model; check the part numbers or consult the manufacturer if unsure. Teflon tape, applied clockwise around threads, creates a watertight seal without the mess of pipe dope.
A common mistake is underestimating the importance of Teflon tape. Too little, and you risk leaks; too much, and you’ll over-tighten connections, potentially damaging the threads. Wrap the tape 2-3 times around the threads, ensuring it’s smooth and not bunched. For the wrench and screwdriver, opt for ergonomic handles to reduce hand fatigue, especially if you’re working in awkward positions. Keep all tools and parts organized in a tray or toolbox to avoid misplacing small components like screws or washers during the repair.
Comparing this step to baking, gathering tools and parts is like measuring ingredients—precision and completeness are key. Just as missing an egg ruins a cake, forgetting the Teflon tape or using the wrong spindle can derail your repair. Unlike baking, however, plumbing mistakes can lead to water damage, making preparation even more critical. Think of the adjustable wrench as your mixing bowl, the screwdriver as your whisk, and the replacement parts as your flour and sugar—each plays a unique role in the final result.
In practice, start by laying out all tools and parts on a clean surface before beginning. Test the wrench and screwdriver on a similar fixture to ensure they fit properly. Inspect the replacement spindle and diverter for defects, and dry-fit them to confirm compatibility. Wrap the Teflon tape around the threads of the spindle and diverter connections, following the “righty-tighty” rule. By taking these steps, you’ll transform a potentially frustrating task into a manageable, even satisfying, DIY project.
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Shut Off Water Supply: Locate and turn off the main water valve to prevent leaks
Before embarking on the task of replacing a Symmons shower tub spindle and diverter, it's crucial to address a fundamental step that can save you from potential disasters: shutting off the water supply. This seemingly simple action is a critical safety measure, often overlooked by DIY enthusiasts in their eagerness to tackle the main task. By locating and turning off the main water valve, you're not just preventing leaks; you're safeguarding your home from potential water damage, which can be costly and time-consuming to repair.
In most residential setups, the main water valve is typically located near the water meter or where the main water line enters your home. This valve is usually a round or oval-shaped handle that can be turned clockwise to shut off the water supply. If you're unsure about its location, consult your home's plumbing diagram or contact your local water utility company for guidance. It's essential to familiarize yourself with this valve's position beforehand, as you don't want to be scrambling to find it in the midst of a plumbing emergency.
Shutting off the water supply is a straightforward process, but it requires attention to detail. Start by slowly turning the main valve clockwise until it's fully closed. You may need to use a wrench or pliers to get a firm grip, especially if the valve is stiff or corroded. Once the valve is closed, open the faucet nearest to the shower to release any residual water pressure in the pipes. This step is crucial, as it ensures that no water is left in the lines, minimizing the risk of leaks during the replacement process.
A common mistake homeowners make is assuming that shutting off the water supply at the shower valve is sufficient. However, this approach can be risky, as these valves may not be designed to handle the pressure and can fail, leading to leaks. By turning off the main water valve, you're isolating the entire plumbing system, providing a more secure and reliable solution. Moreover, this method allows you to work on the shower without worrying about water flow, giving you the peace of mind to focus on the task at hand.
In addition to preventing leaks, shutting off the main water valve offers another significant advantage: it enables you to test your work before restoring water flow. After replacing the spindle and diverter, you can turn on the main valve and check for any leaks or issues. If problems arise, you can quickly shut off the water again and address the concerns without causing further damage. This iterative process ensures a more accurate and efficient repair, ultimately saving you time and effort in the long run. By prioritizing this essential step, you're not just replacing a shower component; you're demonstrating a thoughtful and proactive approach to home maintenance.
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Remove Old Spindle: Unscrew handle, pry off trim, and extract the worn-out spindle
The first step in replacing a Symmons shower tub spindle and diverter is to remove the old spindle, a task that requires precision and the right tools. Begin by unscrewing the handle, which is typically secured with a small screw hidden beneath a decorative cap. Use a flathead screwdriver to gently pry off this cap, revealing the screw underneath. Once the screw is removed, the handle should lift off easily, exposing the trim plate and the spindle mechanism.
Prying off the trim plate is the next critical step, and it demands careful technique to avoid damaging the surrounding tile or tub surface. Insert a thin, flat tool, such as a putty knife or a specialized trim removal tool, between the trim plate and the wall. Apply gentle, even pressure to pry the trim plate away from the valve body. Be cautious not to force it, as excessive pressure can crack tiles or scratch surfaces. If the trim plate is stubborn, consider using a hairdryer to warm the area, which can soften any adhesive holding it in place.
With the trim plate removed, the worn-out spindle is now accessible. Extracting it requires a combination of the right tools and patience. Use a pair of pliers or a spindle puller to grip the spindle firmly. Turn it counterclockwise to unscrew it from the valve body. If the spindle is corroded or stuck, apply a penetrating oil like WD-40 and let it sit for 10–15 minutes before attempting removal again. For particularly stubborn spindles, a propane torch can be used to heat the valve body slightly, but exercise extreme caution to avoid damaging nearby materials.
This process highlights the importance of methodical work and the right tools. Rushing or using improper techniques can lead to unnecessary complications, such as broken tiles or a damaged valve body. By unscrewing the handle, prying off the trim plate carefully, and extracting the spindle with patience, you set the stage for a successful replacement. Remember, the goal is not just to remove the old spindle but to do so in a way that preserves the integrity of the surrounding fixtures, ensuring a smooth installation of the new components.
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Install New Diverter: Insert new diverter, secure with screws, and ensure proper alignment
Replacing a shower diverter is a pivotal step in restoring your Symmons shower system's functionality. Once you’ve removed the old diverter, the next critical phase is installing the new one. Begin by aligning the new diverter with the valve body, ensuring the tabs or notches fit securely into their designated slots. This alignment is crucial for proper operation and leak prevention. If the diverter feels misaligned, double-check the orientation or consult the manufacturer’s instructions, as forcing it can damage the component.
Securing the diverter is equally important. Use the provided screws or those recommended by Symmons, typically #6-32 x ¾” machine screws. Tighten them firmly but avoid over-tightening, as this can strip the threads or crack the diverter housing. A torque wrench set to 10-15 inch-pounds is ideal for precision, but if unavailable, hand-tighten until snug and then give it an additional quarter turn. Over-tightening is a common mistake that can lead to costly repairs down the line.
Proper alignment isn’t just about functionality—it’s about longevity. A misaligned diverter can cause uneven water distribution, leading to premature wear on seals and gaskets. Test the alignment by turning the diverter handle through its full range of motion. It should move smoothly without resistance or wobbling. If you notice stiffness or uneven movement, recheck the alignment and screw tightness before proceeding.
For added assurance, apply a thin layer of plumber’s grease to the diverter’s O-ring or gasket before installation. This reduces friction during assembly and enhances the seal. Once installed, run water through the system to check for leaks at the diverter connection. If leaks occur, tighten the screws slightly or adjust the alignment, but avoid repeated disassembly, as this can degrade the seals. With careful attention to these details, your new diverter will function seamlessly, restoring your shower’s performance.
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Reassemble and Test: Reattach handle, turn on water, and check for leaks or proper function
With the new spindle and diverter in place, the final steps are critical to ensuring your shower functions flawlessly. Reattaching the handle is more than a cosmetic finish; it’s the gateway to testing your work. Align the handle with the valve stem, securing it with the screw provided. Overtightening can strip the threads, so use just enough force to hold it firmly. If your handle has a set screw, ensure it engages the flat side of the stem for proper operation.
Once the handle is reattached, turn on the water supply slowly to avoid sudden pressure spikes. Start with cold water, then gradually introduce hot to observe temperature mixing. Watch for leaks at the handle, escutcheon, or diverter—common trouble spots. A small drip may indicate a loose connection or worn O-ring, while a steady stream suggests improper installation. Use a flashlight to inspect hard-to-see areas, and dry surfaces beforehand to pinpoint moisture sources.
Testing functionality is equally vital. Cycle the handle through its full range, noting resistance or sticking points. If the diverter fails to switch between shower and tub modes, verify the pull-up mechanism isn’t obstructed. For temperature control, adjust the handle to extremes and confirm the water responds accordingly. If the showerhead or tub spout delivers weak flow, check for debris in the aerator or cartridge.
Practical tips can streamline this phase. Keep a bucket and towels nearby to catch water during testing, and use plumber’s tape on threaded connections for added security. If leaks persist, disassemble the handle and reapply silicone grease to seals. For stubborn issues, consult Symmons’ troubleshooting guides or contact their support team. A systematic approach ensures not just a leak-free system, but one that operates as smoothly as the day it was installed.
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Frequently asked questions
You will need a screwdriver, pliers, an adjustable wrench, Teflon tape or pipe thread sealant, and possibly a cartridge puller if the old cartridge is stuck.
Check the model number on your existing Symmons fixture or consult the user manual. You can also take the old parts to a hardware store or contact Symmons customer service for assistance.
First, shut off the water supply. Remove the handle and escutcheon to access the cartridge. Use a cartridge puller if necessary to remove the old spindle. For the diverter, unscrew the diverter stem and remove it carefully.
Insert the new spindle cartridge into the valve body, ensuring it’s aligned properly. Reattach the handle and escutcheon. For the diverter, apply Teflon tape to the new diverter stem threads, screw it into place, and test for leaks after turning the water back on.











































