Concreate Wash Out Base Unit provides a simple, effective and compliant way to manage concrete washdown on-site. This self-contained unit eliminates hazardous alkaline waste by reducing pH levels during washing, allowing for safe, repeatable use. With the Nappy Sack and built-in pump system, you can wash chutes, pumps, skips and mixers without generating harmful runoff.
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Closed-loop recycling system – Wash water is filtered and reused indefinitely; less than 1 m³ to dispose of at job end.
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Safe pH Blue technology – Automatically neutralises high-alkaline concrete wash-water on contact.
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High-capacity performance – Each Nappy Sack handles 50 + chute washes before replacement.
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Quick setup – Fill with ≈ 700 L of water, insert the Nappy Sack, plug into a 32-amp 110 V supply (5 kVA generator min).
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Built for site conditions – CE-marked, powder-coated steel construction with dual tanks and submersible pump system.
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Expandable – Compatible with the Washdown Tray for pump cleaning and other awkward equipment washdowns


















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