💧 Water Shock Arrestor Mini Expansion Vessel
1/2″ BSP Connection | Prevents Water Hammer & Pressure Shock
Protect your plumbing system from damaging pressure surges with this Mini Water Shock Arrestor / Expansion Vessel (1/2″ BSP). Designed to absorb sudden pressure spikes (commonly known as water hammer), it helps prevent pipe noise, vibration, and long-term damage to taps, valves, appliances, and pipework.
Compact and easy to install, this shock absorber is ideal for use with washing machines, dishwashers, mixer taps, toilets, and other quick-closing valves.
🔧 Key Features
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1/2″ BSP connection – Suitable for standard UK plumbing systems
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Prevents water hammer & pressure shock
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Reduces pipe noise and vibration
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Protects appliances and fittings from damage
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Compact mini design – Fits easily in tight spaces
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Durable brass construction
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Pre-charged air chamber for effective shock absorption
💦 How It Works
When a valve closes quickly, water flow stops abruptly, creating a pressure surge inside the pipe. This mini expansion vessel contains an internal air cushion that absorbs the shock, preventing loud banging noises and reducing strain on your plumbing system.
📦 Applications
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Washing machines
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Dishwashers
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Mixer taps
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Toilet fill valves
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Commercial plumbing systems
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Domestic hot & cold water lines
📊 Specifications
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Connection Size: 1/2″ BSP
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Type: Water hammer arrestor / mini expansion vessel
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Material: Brass body
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Installation: Inline (vertical or horizontal depending on setup)
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Suitable For: Hot & cold water systems
✅ Ideal For
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Eliminating pipe banging noises
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Protecting new plumbing installations
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Preventing leaks caused by pressure spikes
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Extending the lifespan of appliances
This 1/2″ BSP Mini Water Shock Arrestor is a simple yet highly effective solution for preventing water hammer and protecting your plumbing system from costly damage.
Add to basket today for quieter, safer plumbing performance.









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