Altecnic Shock Arrestor 0.16 Litre PV016E

The Altecnic 0.16 Litre Shock Arrestor is a small pressure vessel used to absorb the pressure spikes caused by water hammer and thermal expansion in domestic water and heating systems. Inside, a flexible rubber membrane or diaphragm divides the vessel into two chambers, with a compressible gas charge on one side cushioning sudden rises in pressure. Fitting one protects pipework, fittings and components from the noise and mechanical damage that repeated pressure surges cause.

• Persistent banging or hammering noise from pipework when a tap, valve or appliance inlet closes
• Knocking or vibration transmitted through pipework and fittings on the system
• Pressure spikes that recur after the arrestor has been installed for some time
• Water present where it should not be, indicating a failed diaphragm inside the vessel
• Loss of the cushioning effect, with the original noise and shock returning to the pipework

• Confirm the existing arrestor's part number and capacity match PV016E before ordering
• Check the alternative number 2081691 against any listing or catalogue reference you hold
• Inspect the connection point and any sealing washer or gasket at the same time, as these are commonly disturbed during replacement
• Isolate and depressurise the system before removing the old arrestor