Red Dot RD-5-8135-0P Electronic Bypass Water Valve | 72R7105 HVAC Valve

Description

Overview

The Red Dot RD-5-8135-0P is an electronic bypass water valve engineered for mobile HVAC systems. It controls coolant flow to the heater core using an electric signal rather than a manual or cable-driven input. Because of this design, it offers smoother and more accurate temperature regulation in modern climate systems.

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How This Valve Works

The bypass design allows coolant to circulate through alternate flow paths when the valve is closed. This reduces thermal shock and helps maintain stable coolant temperatures. Since the valve uses electronic actuation, it responds quickly to control inputs from the HVAC panel or controller, which improves cabin comfort and system efficiency.

The valve’s durable construction makes it well suited for trucks, buses, agricultural equipment, and off-highway machines. It replaces older electric valves and restores consistent heater performance when the original valve begins to stick or leak.

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When to Replace This Valve

You should replace the RD-5-8135-0P when you notice:

• Cabin heat fluctuates or drops without reason

• Temperature changes do not follow HVAC settings

• The valve makes clicking or buzzing noises

• Coolant leaks appear around the valve body

• Electronic control signals do not move the valve

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Specifications

• Part Type: Electronic bypass water valve
• Control Method: Electronic actuation
• Flow Type: Inline coolant control with bypass function
• Material: Heavy-duty composite and metal construction
• Factory Number: RD-5-8135-0P
• Red Dot Cross: 72R7105
• Typical Use: Red Dot heater systems requiring electronically controlled coolant flow

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Interchange Numbers

232-8689, 2410, 4379-RD581350, 4379-RD581350P, 625-4314, 72R7105, ABP N83 324575, RDHRD581350P, RDT72R7105