Detail for connection between pressure and gravity pipe
Detail for connection between pressure and gravity pipe
(OP)
Hi,
I have connection between gravity sewer pipe (GRP 800 mm) and pressure pipe (Ductile 800 mm) and the output gravity (GRP 1200 mm), as you can see in attached file. I want to know the principles who to design the connection between pipes, or drawing for similar case.
I have connection between gravity sewer pipe (GRP 800 mm) and pressure pipe (Ductile 800 mm) and the output gravity (GRP 1200 mm), as you can see in attached file. I want to know the principles who to design the connection between pipes, or drawing for similar case.





RE: Detail for connection between pressure and gravity pipe
In general, you want the force main to enter on the opposite side of the MH discharge. That way there will be no change in the direction of flow.
The force main entrance elevation should be within 2 ft of the MH discharge pipe. Otherwise, you should consider a drop manhole.
Note that the force main piping should be restrained before the nmanhole. Use a flexible compression connector where the pipe enters the manhole wall.
RE: Detail for connection between pressure and gravity pipe