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	Grade Rings and Grade Ring Inserts A grade ring is used to extend the height of an existing riser, pump basin, or sand filter pump basin. It’s constructed of a section of ribbed PVC pipe with a grade ring insert affixed to its edge. Grade ring inserts can be purchased separately. See also Riser Tank Adapters and Bolt-down Kits (FRTA, PRTA, RRFTA).
	Product Nomenclature
	Product Example Model Code GR2403   Description PVC Grade Ring, 24-in. diameter with attached 3-in. riser Model Code GRI24RLA   Description RLA Grade Ring Insert for 24-in. diameter access risers with existing Riser-to-Lid Adapter
	Related Products Large Access Risers Adhesives — ADH100 Large Lids Adhesives — MA320 Riser-To-Lid Adapters