Chamber Bases and Risers Available in Two Sizes with Risers for Ease of Access Inspection Chamber Bases, come in two sizes 320mm and 460mm. Part of the 110mm Underground Drainage range, chamber bases are utilised to enable an access point for different drainage sections to be inspected. The range stocked is Polypipe, one of the market leading brands for Underground Drainage products and manufactured to BSI standards.
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Now available in White, Colours and Woodgrains including Anthracite Grey.