LKQI Replacement 118705 Coupler Assembly — 1/2 in Inline Booster Pump, Cast Iron, Fits Armstrong 806026-01

Overview

The LKQI Replacement 118705 coupler assembly is a practical upgrade for inline booster pump installations. Designed to replace worn connectors in compatible systems, this part combines a robust cast iron body with a spring driven coupler to support secure, responsive connections. Sized for 1/2 inch pump lines and 1/2 inch motor connections, it typically suits small to mid sized booster configurations and is compatible with motors in the 1/4 to 1/3 hp range. This makes it a thoughtful choice when refreshing an aging inline boost setup without a full system overhaul.

Durability and performance

• Cast iron construction delivers rigidity and resistance to everyday wear.
• Spring pump coupler supports consistent engagement and reduces play during operation.

Key specifications

• Fits 1/2 inch pump and 1/2 inch motor connections
• Motor horsepower compatibility typically 1/4 to 1/3 hp
• Part numbers referenced for replacement: 118705 189110 PZ-4291

Compatibility and retrofit options

• Fits Armstrong 806026-01
• Compatible with Hydrovalve RM-876
• Accepted in Sid Harvey 156 series and related strainers or cylinders SSC-779

Practical benefits in real setups

• Quiet, steady operation thanks to a spring loaded coupling
• Less downtime due to straightforward replacement of worn connectors
• Solid, long lasting materials designed for pump room environments

Usage tips

Before installation, compare your pump size and motor horsepower to the 1/4-1/3 hp range and 1/2 inch connections described here. Disconnect power, drain the line, and replace any related seals as needed for a clean, secure fit.

Part numbers linked to this component include 118705, 189110, and PZ-4291 to help you locate the correct replacement in catalogs or supplier portals.