The Delta T27T967 MultiChoice Valve Trim with Diverter is designed for precise temperature control and flexibility in plumbing systems. Proper installation is critical to ensure safe and effective operation. This article provides a detailed overview of the installation process, including preparation steps, assembly instructions, and post-installation adjustments, all based on the official Delta installation manual for T27T967 models.
Overview of the Delta T27T967 Diverter Valve
The T27T967 is a multi-functional diverter valve trim used in conjunction with pressure balance valve cartridges. It is compatible with Delta’s line of valve systems and offers options for both standard and thick wall installations. The valve includes features such as rotational limit stops, adjustable temperature settings, and a diverter mechanism that allows for multiple water flow configurations.
The installation process involves several key steps: preparing the plumbing system, installing the valve cartridge and diverter assembly, attaching the trim components, and adjusting the rotational limit stop to ensure safe water temperatures. The manual emphasizes the importance of correct installation by the user or a qualified installer, as improper setup can result in unsafe water temperatures and potential injury.
Preparation for Installation
Before beginning the installation, several preparatory steps must be followed to ensure the process is efficient and the final system is safe and functional.
Turning Off Water Supplies
The first step in any valve installation is to turn off the water supply to the system. This prevents water from flowing during the assembly process and reduces the risk of injury or damage. Once the water is off, the bonnet nuts and test caps should be removed from the rough-in body to allow for cleaning and inspection.
Flushing the Supply Lines
After removing the bonnet nuts and test caps, it is recommended to flush the supply lines to remove any debris. This is done by placing a bucket or small container over the front of the valve body and slowly opening the water supply valves. This step helps ensure that the internal components of the valve are not clogged by sediment or other particles that could affect performance or cause damage.
Inspecting the Valve Cartridge
If the water in the area is known to contain lime, rust, sand, or other contaminants, the pressure balance valve may require periodic inspection. The manual recommends removing the valve cartridge and shaking it in the full mix position to check for a rattling sound, which indicates that the internal components are functioning properly. If no rattling is detected, the housing assembly should be replaced with the appropriate replacement part.
Installing the Valve Cartridge and Diverter
The installation of the valve cartridge and diverter assembly is a critical step that requires careful attention to detail.
Installing the Adapter Assembly
The adapter assembly must be inserted into the rough-in body. It is important to ensure that the adapter is correctly positioned and fully seated within the body. For back-to-back or reverse installations (where hot water is on the right and cold on the left), the valve cartridge should be rotated so that the label “HOT SIDE” appears on the right. In standard installations, the label should appear on the left.
Inserting the Cartridge
Once the adapter is in place, the valve cartridge can be inserted into the rough-in body. The key on the valve cartridge must be fully engaged with the slot in the brass body to ensure proper alignment. A light coating of plumber's grease on the O-rings can aid in the installation process and help create a secure seal.
Installing the Diverter Cartridge
The diverter cartridge is installed in a similar manner. A silicone lube should be applied to the O-ring to ease the installation of the diverter sleeve. The locating pin on the bottom of the cartridge must align with the mating hole in the rough-in body. The diverter sleeve is then slid over the cartridge stem, ensuring that the tabs align with the slots in the body.
Installing the Bonnet Nut
The bonnet nut is then threaded onto the rough-in body and hand-tightened. It is important not to overtighten the nut, as this can damage the O-rings or the body of the valve. The manual emphasizes that the use of a screw to secure the bonnet nut is not recommended.
Trim and Escutcheon Installation
After the valve and diverter cartridges are installed, the trim components can be added to complete the installation.
Installing the Trim Sleeve
The trim sleeve is slid over the bonnet, cartridge, and rough-in body. It must be positioned correctly to ensure that it covers the front of the cartridge. This helps protect the internal components from damage and provides a clean, finished look.
Installing the Escutcheon
The escutcheon is installed next. For installations with a finished wall thickness of up to 1 1/8 inches, the backplate is secured to the rough-in body using four provided screws. If the wall is thicker than this, a thick wall installation kit (RP) must be ordered to accommodate the additional thickness.
The manual provides specific instructions for thick wall installations, including the use of caulk around the backplate on rough or uneven surfaces. However, it is important to avoid caulking the drip notch at the bottom of the backplate and the escutcheon itself, as this could interfere with water drainage and lead to water damage.
Installing the Volume Control Handle
The volume control handle is installed with the lever pointing down and then turned to the on position. The manual explicitly states that the handle should not be secured with a screw, as this can restrict the movement of the handle and affect the performance of the valve.
Adjusting the Rotational Limit Stop
One of the most important steps in the installation process is the adjustment of the rotational limit stop. This component controls the maximum temperature of the water that can be dispensed through the valve and must be set by the installer to ensure safe operation.
Positioning the Limit Stop
The rotational limit stop is placed in the volume handle and rotated to the mixed position. It is not secured with a screw, as the manual warns that doing so could prevent the limit stop from functioning properly.
Testing the Water Temperature
Once the limit stop is in place, the water supplies are turned on, and the water is allowed to run until both hot and cold water are at their maximum temperatures. A thermometer is used to measure the water temperature, and the results are recorded. This step is important because the installer must ensure that the water temperature does not exceed safe levels, as this could lead to burns or other injuries.
Labeling and Documentation
After the installation is complete, the installer is required to affix their name, company name, and the date of the adjustment to the caution label provided. This label must be attached to the back of the closest cabinet door and the warning label must be applied to the water heater. This documentation is important for future reference and ensures that the owner is aware of the installation and adjustment process.
Maintenance and Troubleshooting
Regular maintenance is essential to ensure that the Delta T27T967 valve continues to function properly. The manual provides several tips for maintaining the valve and troubleshooting common issues.
Cleaning and Care
The finish on the valve is durable but can be damaged by harsh abrasives or polish. To clean the valve, it should be wiped gently with a damp cloth and then dried with a soft towel. This helps preserve the appearance and functionality of the valve over time.
Replacing the Valve Cartridge
If the faucet begins to leak from the shower outlet, the valve cartridge may need to be replaced. The manual recommends replacing the valve cartridge with part number RP46463 and following the helpful hints provided for the process. This includes noting the position of the rotational limit stop before removing the cartridge and ensuring that the cartridge is reinstalled in the same position.
Helpful Hints for Installation and Maintenance
The manual includes several helpful hints to guide the installation and maintenance process:
- Before removing the valve cartridge, the position of the rotational limit stop should be noted. The cartridge must be reinstalled in the same position to ensure proper function.
- When removing the valve cartridge, it should not be pried out with a screwdriver. Instead, the handle should be placed on the stem and rotated counterclockwise approximately 1/4 turn after the stop has been contacted.
- After the installation is complete, the water should be turned on to ensure that cold water flows first. This helps prevent any unexpected hot water surges that could cause discomfort or injury.
Conclusion
The Delta T27T967 MultiChoice Valve Trim with Diverter is a versatile and reliable component for plumbing systems that require precise temperature control and multiple water flow configurations. Proper installation is essential to ensure the safety and functionality of the system. The installation process involves several key steps, including preparing the plumbing system, installing the valve and diverter cartridges, attaching the trim components, and adjusting the rotational limit stop. Regular maintenance is also important to keep the valve operating efficiently over time.
By following the detailed instructions provided in the Delta installation manual, users can ensure that their valve is installed correctly and functions safely. The manual also includes helpful hints and troubleshooting tips that can assist in the installation and maintenance process, making it a valuable resource for both professional installers and DIY enthusiasts.