well we have installed the gravity lateral to force main and it is working just fine...I kinda appreciate your replies but none were really based on engineering just fear. check valve is not even active since it is above force main outlet elevation.
The manhole that the the force main pumps to is well below the house and will be below the check valve. The check valve will only be needed if the force main collapses between the residential connection and the manhole.
Existing 6 inch force main ties into manhole . From that manhole there is a 8 inch gravity sewer. Fl elevation at manhole is 59. Manhole lid is at 62.5 only 3.5 feet deep. There is a single family home at elevation about 76. It is currently piped into the manhole.
This will no longer be...
I am using a 6 inch pipe...No need for a larger pipe...other than ease of TV. Will depend on upstream MH and downstream to hold pipe in place and and hope to channel flow in manhole into downstream pipe that has less grade ( will reduce slope to 20% prior to entering downstream manhole. No cost...
thread161-90643
I am going to have sewer constructed with directional drilling at grade increasing all the way to 70%! It will be a 6 inch with commercial flow from a 911 center..i.e not much flow. I do not see much of an issue although some engineers say there is a max flow for solids...
