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Weil McLain 640-000-028 3Way Valve Combi Only

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Special Price $321.45 Regular Price $356.81
In stock
SKU
640-000-028
The Weil McLain 640-000-028 3-Way Valve Combination is used to control and combine water flow in hydronic heating elements to provide management over the amount of heat supplied and returned to the HVAC systems. It is designed for use in boilers and radiant heating elements, with an internal porting system that directs water to loop or mix for even distribution. It is provided with a connection to the piping network of standard wiring, which allows free switching between circuits. This part balances energy efficiently, and the system operates stably in various heating zones.
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HVAC Controls & Electrical, Valves
Manufacturer:
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Manufacturer Name: Weil McLain
Product Number: 640-000-028
OEM Part Number: 640-000-028
Product Description: 3Way Valve Combi Only
Weight:1.15lbs/521.63g

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Product Questions (2)
Customer Questions
What maintenance is required for the Weil McLain 640-000-028 Valve?

Periodically check the valve for leaks, corrosion, and smooth operation. Ensure connections are tight and actuators function properly. Clean debris around moving parts and test for proper flow direction.

What are common issues with the Weil McLain 640-000-028 Valve?

  • Valve sticking or failing to shift properly.
  • Leaks around seals or connections.
  • Actuator malfunction or unresponsive control.
  • Inconsistent water flow or temperature fluctuations.

Installation Steps

Step 1: Turn off all power and water supply to the combi boiler to ensure safety.

Step 2: Drain water from the system as needed to access the existing valve.

Step 3: Remove the old valve from the piping assembly.

Step 4: Install the new valve in the correct orientation and secure fittings.

Step 5: Refill the system, restore power, and check for leaks and proper operation.