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Large Bore Flexible Tap Connectors (0)

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Large Bore Shower Hose (0)

Lead to Copper Fitting (0)

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MGA Gas Test Adapter (0)

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Micropoint Cooker Hose (0)

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Mini Lever Ball Valve (0)

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Noise Reducer (0)

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Non Return Valve (0)

Non-Resettable Immersion Thermostat (0)

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Offset Drain Connector with Boss (0)

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Plasson MDPE Adapter (0)

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Plasson Universal Adapter (0)

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Polyplumb 2 Port Manifold (0)

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PSA DZR Adapter (0)

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Rainwater Diverter (0)

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Release Aid (0)

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Resettable Immersion Thermostat (0)

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Spacesaver (0)

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Speedfit 4 Port Manifold (0)

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Air Admittance Valves

Air admittance valves allow air to enter a plumbing and drainage system when negative pressure starts to build up in the piping system. When this pressure is normalized, the vent closes, stopping sewer gases from entering a building. Here at On-Demand Supplies we stock a wide range of vents, in various sizes and colours, from trusted brands such as McAlpine.