 1615 Too little or too much slope is not good
1616 Trap terminology
1617 Trap cleanout required
1618 No traps for toilets
1619 Trap Primer
1620 Vent terminology |  1621 Soil stack versus waste stack
1622 Stack vent
1623 Proper vent location relative to trap
1624 Direct venting
1625 Wet venting |
