Series 5000-3 Mixing Valve Body

Taco 5000-3 Series 5000-3 Mixing Valve Body

A forged-brass mixing valve body used as a replacement component in Taco 5000 Series lead-free thermostatic mixing valve assemblies for domestic hot water temperature control.

Key Features:

• Forged brass valve body
• Listed as a valve body with no gauge included
• Application listed as a replacement part
• Taco describes the 5000 Series Lead-Free Mixing Valves as providing performance for domestic hot water installations, allowing storage at higher temperatures while delivering mixed water at a safe 120°F or less
• Manufacturer states the series provides a stable mixed water temperature across an extended 85°F - 176°F mix temperature range
• Manufacturer instruction sheet states the Series 5000-3 valve is factory set at 105 - 115°F with a 150°F hot water inlet temperature

Compatibility & Applications:

• Listed under Taco 5000 Series
• Intended for use as the Series 5000-3 mixing valve body in the 5000 Series system (as listed/manufacturer series context)
• Must only be used where the manufacturer specifies this exact part number: 5000-3

Installation & Operation Notes:

• Installation should be performed by a licensed professional
• Reference the system's service/installation manual and Taco's 5000-3 instructions for proper installation and temperature setting.
• Manufacturer installation guidance highlights:
• Flush all piping thoroughly before installing the valve; not flushing is cited as a common cause of improper performance.
• If water quality is poor, a filter/strainer should be installed at the system inlet to help protect the water heater and mixing valve from dirt/debris.
• Remove the valve from piping prior to soldering end connections; a spacer piece is recommended during soldering.
• Temperature adjustment procedure is provided by the manufacturer (remove knob/cover as directed, run water to stabilize, verify temperature with an accurate thermometer, then adjust per instructions).

Maintenance & Troubleshooting:

• Manufacturer guidance ties performance issues to installation conditions such as debris in the system (flush piping; consider an inlet strainer where needed).
• Field feedback commonly associates replacement with symptoms like mixed outlet temperature drifting, inconsistent hot water delivery, or a valve that no longer regulates as intended over time.
• If issues persist after replacement, follow manufacturer and equipment diagnostics to confirm correct installation, clean piping conditions, and correct temperature setting/verification procedure.

Certifications & Compliance:

• Taco states the 5000 Series Lead-Free Mixing Valves are NSF 61 and ASSE 1017 certified.
• Manufacturer catalog lists approvals including ASSE 1017, cUPC listed, and CSA B125.3, and notes NSF <_ 0.25% lead plus compliance references to California AB 1953 and Vermont Act 193 for the series.

User Reviews & Q&A Summary:

• Common positives: described as working well as a replacement and restoring normal operation when properly matched.
• Common install notes: reviewers emphasize checking dimensions/details to confirm it matches the failed valve body; some mention it was a "very close" replacement.
• Common issues mentioned: some reviewers note gaskets were not included, and a few report shorter service life or gradual loss of temperature regulation (temperature "creeping" upward or hot water delivery becoming inconsistent), leading to repeated replacements.