Lochinvar L100208413 Bypass Loop Pump

Product Description

The LOCHINVAR L100208413 is a bypass loop pump designed to maintain minimum flow rates through hydronic heating systems. It circulates water through a dedicated bypass loop, protecting the heat exchanger from low-flow or no-flow conditions that can cause thermal stress and premature failure. Licensed HVAC technicians and hydronic heating specialists install this component as part of proper system design or retrofit applications. It plays a critical role in systems where variable-speed distribution pumps or zone valves may reduce flow below the boiler manufacturer's minimum threshold.

This bypass loop pump is suited for residential and light commercial hydronic systems, particularly those using condensing boilers or high-efficiency water heaters where maintaining minimum flow is essential. It is typically installed in parallel with the primary distribution circuit, allowing continuous low-level circulation independent of zone demand. When zoned systems close all circuits simultaneously, the bypass loop ensures the heat source remains protected from heat buildup and thermal shock.

Key Features

• Designed to maintain minimum flow through hydronic heating equipment bypass circuits
• Protects heat exchangers from low-flow and no-flow damage conditions
• Suited for parallel installation in zoned hydronic distribution systems
• OEM component from LOCHINVAR for direct replacement or new installation

Compatibility

Designed as an OEM-style replacement bypass loop pump for LOCHINVAR hydronic heating systems. Consult the equipment documentation or LOCHINVAR technical support to confirm fitment for a specific model before installation.

Installation Notes

Installation should be performed by a licensed HVAC or hydronic heating technician familiar with closed-loop hydronic systems. Shut off and isolate the boiler or water heater and depressurize the circuit before beginning any pump replacement work. Follow applicable local mechanical codes and the equipment manufacturer's installation instructions for proper orientation, flow direction, and piping configuration. Do not operate the pump dry, as this can damage internal seals and components.

Technical Specifications

• Application: Bypass Loop Circulation
• System Type: Hydronic Heating

Standard Information

• Brand: LOCHINVAR
• Manufacturer Part Number: L100208413