DISTANCE BETWEEN TWO PIPE CENTER MINIMUM 15 mm 20 mm 25 mm 40 mm 50 mm 75 & 80 mm 100 mm 150 mm 200 mm 250 mm 300 mm 350 mm 400 mm 450 mm 500 mm 600 mm MAXYMUM DIAMETER 1/2" 3/4" 1" 1-1/2" 2" 3" 4" 6" 8" 10" 12" 14" 16" 18" 20" 15 mm 1/2" 85 20 mm 3/4" 96 100 25 mm 1" 100 100 105 40 mm 1-1/2" 115 115 120 125 50 mm 2" 120 120 125 130 140 75 & 80 mm 3" 140 150 145 155 160 175 100 mm 4" 165 165 170 175 180 195 210 150 mm 6" 195 200 200 210 215 230 240 270 200 mm 8" 225 230 235 240 245 260 275 300 325 250 mm 10" 260 260 265 270 280 295 305 330 360 385 300 mm 12" 295 300 305 310 315 330 345 370 395 425 450 350 mm 14" 330 330 335 340 345 360 375 400 425 455 480 495 400 mm 16" 360 365 365 375 380 395 405 435 460 485 510 525 550 450 mm 18" 290 395 400 405 410 425 440 465 490 520 545 560 585 610 500 mm 20" 425 425 430 435 445 460 470 495 525 550 575 590 615 640 665 600 mm 24" 495 495 500 505 510 525 540 565 590 620 645 660 685 710 735 24" 785