Minimum Sump Dimensions (in accordance with BS EN 12845) Diameter (D) Deadwater Level (mm) Minimum Sump Dimensions (mm) Pipework Length (mm) (C) Length (L) Width (W) Depth (A) 100NB 30 1000 600 170 1050 150NB 30 1375 900 170 1150 200NB 30 1750 1200 220 1250 250NB 30 2125 1500 270 1350 300NB 30 2500 1800 270 1450 350NB 30 2775 2100 370 1450 400NB 30 3050 2400 370 1450 450NB 30 3325 2700 420 1450 Sump offset from tank shell = 600mm

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