DW85745
Member
Whoever installed the septic tank installed it backwards -- outlet higher inlet by about 1 inch.
I'm planning on having a new outlet holed cored around 1 1/2 to 2 inches below the current.
Whoever originally plumbed this used 3 inch ABS Schedule 40 both for outlet and inlet piping
and appeared to use hydraulic cement around the pipe where it enters the tank. They also cemented
the 3 inch pipe into the D-Box.
I would like to upgrade the inlet DWV line from 3 inch to 4 inch but only have 2 inches of fall
over about 45 feet and am concerned with possibly causing more problems if the inlet pipe
doesn't get set just right as that will have an impact on outlet..
On the outlet side the new D-Box, which I'm replacing has built in seals which take a 4 inch thin wall DWV.
Questions:
1) Should I upgrade to 4 inch on the inlet side or leave well enough alone.
2) Would it be better to also keep the outlet side at 3 inch (sch40) instead of going to the thin wall pipe
because that is what the D-Box will accept?
This is the outlet end looking from tank to old D-Box
'This looking at outlet tank end. New D-Box is pictured in foreground.
I'm planning on having a new outlet holed cored around 1 1/2 to 2 inches below the current.
Whoever originally plumbed this used 3 inch ABS Schedule 40 both for outlet and inlet piping
and appeared to use hydraulic cement around the pipe where it enters the tank. They also cemented
the 3 inch pipe into the D-Box.
I would like to upgrade the inlet DWV line from 3 inch to 4 inch but only have 2 inches of fall
over about 45 feet and am concerned with possibly causing more problems if the inlet pipe
doesn't get set just right as that will have an impact on outlet..
On the outlet side the new D-Box, which I'm replacing has built in seals which take a 4 inch thin wall DWV.
Questions:
1) Should I upgrade to 4 inch on the inlet side or leave well enough alone.
2) Would it be better to also keep the outlet side at 3 inch (sch40) instead of going to the thin wall pipe
because that is what the D-Box will accept?
This is the outlet end looking from tank to old D-Box
'This looking at outlet tank end. New D-Box is pictured in foreground.
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