main venting

Steve_210

does anybody have a chart for main and riser venting. if i use 1 gorton no1 for each 20ft of 2in pipe and multipfy from there would i be close 

jpf321

looks like ...

looks like, using my worksheet and Mr. Gill's figures .. approximately....



1" @ 60ft @ 1min @ 1oz = 1G#1

1-1/4 @ 22ft  "       "        "         "      "

1-1/2 @ 21ft "      "         "          "

2" @ 12ft    "       "        "         "      "

2-1/2" @ "       "        "         "      "

3"  @ 5.5ft  "       "        "         "      "