Delta’s 17 Series and 17T Series MultiChoice Valve Trim are essential components in modern thermostatic and pressure-balanced shower and tub systems. Designed to ensure precise water temperature control and safe operation, these valve trims require careful installation, periodic inspection, and proper maintenance. This guide provides a detailed, step-by-step overview of installation procedures, troubleshooting common issues, and best practices for ensuring long-term performance and user safety.
Overview
The MultiChoice Valve Trim is a critical part of Delta’s pressure-balanced and thermostatic valve systems, offering homeowners and installers flexibility in configuration and control. The 17 Series and 17T Series models differ in their adjustment mechanisms and are both governed by rigorous standards such as ASME A112.18.1/CSA B125.1 and ASSE 1016. These standards ensure that the valves meet requirements for temperature control, pressure balancing, and safety.
Installation and adjustment of these valves are the responsibility of the installer, as improper setup can lead to unsafe water temperatures or system failure. The manuals for both the 17 Series and 17T Series emphasize the need for careful handling, alignment of components, and post-installation testing.
The following sections will explore key installation steps, maintenance procedures, troubleshooting techniques, and safety considerations based on the official instructions provided in Delta’s user manuals.
Key Installation Steps
1. Preparation and Tools
Before beginning installation, ensure that all required tools and replacement parts are available. The installation process involves removing the existing valve trim and replacing it with the new Delta MultiChoice Valve Trim. The following items may be necessary:
- O-ring (for sealing and spacing)
- Bonnet nut
- Sleeve
- Allen wrench (for handle installation)
- Escutcheon and bracket hardware
- Replacement cartridge (RP47201 if needed)
The official documentation suggests that installers visit www.deltafaucet.com to order replacement parts or installation kits for thick wall applications.
2. Installing the Valve Trim Components
Installation begins by assembling the internal components of the valve trim:
- Slide the O-ring over the cartridge and the bonnet nut. The O-ring serves as a spacer and stabilizer for the sleeve. It should be positioned behind the bonnet nut.
- Slide the sleeve over the cartridge and body. Ensure the sleeve is properly aligned and covers the front of the cartridge.
Secure the escutcheon and bracket:
- Attach the escutcheon to the bracket using the provided screws. Do not overtighten.
- If the product includes a cover, press it onto the escutcheon.
- Install the bracket over the cartridge body using the provided screws.
- Align and lock the escutcheon tabs by rotating it into place.
- Secure the escutcheon to the bracket using a set screw.
Install the volume control handle:
- Position the handle with the lever to the right.
- Use an Allen wrench to secure the handle with a set screw.
For installations in thick walls (up to 1 3/4 inches), Delta recommends consulting the technical specifications of the model and ordering an appropriate thick wall installation kit (RP series).
3. Tub Spout Installation
When installing a tub spout, Delta provides specific instructions to avoid damage or performance issues:
- Follow the manufacturer’s installation instructions provided with the spout.
- Do not connect deck-mounted spouts to in-wall valves.
- Avoid using hand showers in place of a tub spout with the valve system.
- Do not use PEX tubing for the tub spout drop.
These precautions ensure proper water flow and prevent system malfunctions.
Maintenance and Inspection
1. Regular Inspection for Contaminants
Water quality can significantly affect the performance of the MultiChoice Valve Trim. If the water in the area contains lime, rust, sand, or other contaminants, the pressure balance valve will require periodic inspection.
To inspect the cartridge:
- Remove the valve cartridge.
- Shake it vigorously in the full mix position. If a rattling sound is heard, the unit is functional.
- If no rattle is heard, replace the housing assembly with the appropriate replacement part (RP).
The frequency of inspections depends on the level of contaminants in the water supply.
2. Cleaning Clogged Screens
Low water flow may indicate clogged screens within the thermostatic cartridge. To clean the screens:
- Turn off the water supply.
- Remove the handle assembly.
- Unscrew the hex-shaped portion of the cartridge from the brass section while securely holding the brass portion by the flats.
- Clean debris from the screens under running water. For stubborn deposits, soak the screens overnight in a 50% water and 50% vinegar solution.
- Reassemble the cartridge and reinstall the handle.
- Turn the water back on and reset the limit stop before using the valve.
This process ensures that the valve maintains proper water flow and temperature control.
3. Replacing the Cartridge
If the valve continues to leak after cleaning, the cartridge assembly must be replaced. The recommended replacement part is RP47201.
- Turn off the water supply.
- Remove the handle assembly, trim sleeve, and bonnet nut.
- Verify the alignment of the "H" and "C" markings on the cartridge with the hot and cold inlets. Misalignment can prevent proper function.
- Install the new cartridge assembly following the same procedure as the original.
Troubleshooting Common Issues
1. Inability to Maintain Mixed Water Temperature
If the valve fails to maintain a consistent mixed water temperature:
- Turn off the water supply.
- Remove the handle assembly, trim sleeve, and bonnet nut.
- Check the alignment of the "H" and "C" markings on the cartridge. The "H" marking must align with the hot inlet, and the "C" marking with the cold inlet.
- Replace the cartridge if misaligned or damaged.
2. Low Water Flow
Low flow is often caused by clogged screens. Refer to the Cleaning Clogged Screens section for the full procedure.
3. Leak from Valve
If a leak persists:
- Turn off the water supply.
- Replace the cartridge assembly with RP47201.
- Ensure the O-ring and bonnet nut are properly installed.
4. Adjusting the Temperature Knob
The 17T Series requires temperature knob adjustments. Since the valve does not automatically adjust for seasonal or inlet temperature changes, manual adjustments may be necessary. Delta emphasizes that the installer must inform the user of the need for future adjustments.
- Refer to page 7 of the 17T Series manual for adjustment instructions.
- If unsure, contact Delta at 1-800-345-DELTA for assistance.
After making adjustments:
- Affix the installer’s name, company, and date to the caution label.
- Attach the label to the back of the nearest cabinet door and the warning label to the water heater.
Safety and Compliance Considerations
1. Do Not Install Shut-Off Devices
A critical warning in the documentation states that shut-off devices should not be installed on either outlet of the valve. Such devices can prevent the valve from balancing hot and cold water pressures, leading to unsafe conditions.
2. Limit Stop Adjustments
The Rotational Limit Stop in the 17 Series and the Temperature Knob in the 17T Series are essential for setting safe maximum temperatures. These adjustments must be made by the installer, and users should be informed of the need for future adjustments due to seasonal changes in water temperature.
3. Avoid Misuse of the Valve System
Delta explicitly warns against using hand showers in place of a tub spout or connecting deck-mounted spouts to in-wall valves. These configurations can lead to improper water flow and system failure.
Best Practices for Installation and Use
- Follow all manufacturer instructions for installation and adjustment.
- Verify water supply conditions, especially for areas with high mineral or sediment content.
- Use only approved replacement parts, such as RP47201.
- Inform users of the need for periodic maintenance and potential seasonal adjustments.
- Do not attempt to modify or bypass system components without manufacturer guidance.
Conclusion
The Delta 17 Series and 17T Series MultiChoice Valve Trim are critical components in ensuring safe and comfortable water temperatures in residential bathroom systems. Proper installation, alignment, and maintenance are essential for long-term performance and user safety. By following the detailed instructions provided in the official manuals, installers can ensure that the valve trim functions as intended, minimizing the risk of hot water burns or system failure.
Periodic inspection and cleaning are necessary in areas with hard water or high contamination levels. Additionally, users must be informed of the limitations of the valve system and the potential need for manual adjustments. Delta’s documentation emphasizes the importance of adhering to safety standards, using approved replacement parts, and avoiding improper configurations that could compromise system integrity.
For further assistance, installers and users are encouraged to consult Delta’s official resources at www.deltafaucet.com or contact customer support at 1-800-345-DELTA.