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Home » ASPE Product Overview--Extendable Backwater Valve
Mainline Backflow Products has introduced the Mainline Adopt-A-Valve extendable backwater valve, made extendable with a standard 4" DWV. The extendable cassette allows deep burial access without the need of a manhole. The valve features an extension ring for ground level or floor level access, along with an extention adaptor and a reversable cassette feature. Mainline Backflow Products.
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