Shock Arrestor

Aprilaire 4280 Shock Arrestor – Water Hammer Suppressor for Solenoid Valves

The Aprilaire 4280 Shock Arrestor is an effective solution for reducing or eliminating water hammer in residential and commercial plumbing systems. Water hammer occurs when high water pressure and the rapid opening or closing of solenoid valves cause pipes to pulse, creating a loud “hammering” noise.

Designed for easy installation, the 4280 Shock Arrestor acts like a shock absorber for your water lines, minimizing pressure surges and protecting plumbing components. Simply install it on your 1/4-inch water line within 2 feet of the solenoid valve to ensure optimal performance and quieter operation.

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Key Features & Benefits

• Manufacturer: Aprilaire

• Part Number: 4280

• Product Type: Shock Arrestor / Water Hammer Suppressor

• Reduces water hammer caused by high pressure or solenoid valves

• Protects plumbing lines and reduces noise

• Easy installation: cut the 1/4-inch water line and insert the device within 2 feet of the solenoid valve

• Acts like a shock absorber to stabilize water pressure

• Durable construction for long-lasting performance

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Applications

• Residential and commercial HVAC systems with solenoid valves

• Humidifiers and water filtration systems

• Plumbing systems prone to water hammer or pressure surges

• New installations or retrofit projects for quieter water operation

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Product Overview

The Aprilaire 4280 Shock Arrestor provides a simple and effective way to prevent water hammer and protect plumbing systems from sudden pressure surges. Its compact design and straightforward installation make it an essential component for maintaining quiet, efficient, and reliable water flow in homes and commercial buildings.