??????? yu meen max slope av sewer pipe ?????????
???? pipe start at hite=89.25 & end at hite=89.42 ????? so it go uphill ???????
gotta go downhille, so me assume yer numbers bakward
delta hite=89.42-89.25=0.17
run=29
slope=0.17/29=0.00586206896 more or less
1/85=0.011764705
yes, slope < 1/85