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The WATTS 899240 is a replacement sleeve cover designed to protect the internal components of select WATTS backflow preventer assemblies. This cover fits valve bodies in the 2.5-inch to 4-inch size range, providing a durable outer enclosure that shields the check valve and relief valve mechanisms from physical damage and environmental exposure. It is a direct replacement part intended for installation by licensed plumbers and backflow prevention specialists performing routine maintenance or field repairs on commercial and municipal water supply systems.
This sleeve cover is used on mid- to large-diameter backflow prevention assemblies commonly found in commercial buildings, industrial facilities, and irrigation systems. The 2.5-inch to 4-inch size range makes it suitable for higher-flow applications where larger valve bodies are required. It is a field-replaceable component that allows technicians to restore proper enclosure integrity without replacing the entire assembly.
Compatible with WATTS 957, 957RPDA, C400, C500, M400, and M500 series backflow preventer assemblies in 2.5-inch to 4-inch sizes.
Installation should be performed by a licensed plumber or certified backflow prevention technician. Shut off the upstream water supply and depressurize the assembly before removing the existing sleeve cover. Follow all applicable local plumbing codes and the manufacturer service documentation for the specific valve series being serviced.
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