How to drill the cast iron pipe for sewerage, my house has no bathroom on the first floor, but there

You can play, option 1; Draw the hole to be opened on the pipe, use a hand drill to drill the hole little by little, the connection between the holes is as small as possible, drill a hole in the middle of the plate to be dropped, tie a thin wire to prevent it from falling into the pipe, and use a hammer and chisel to tap the connection between the hole and the hole until it is all smashed. option 2; Cut with electric welding. option 3; It is cut with an angle grinder.

Prepare before playing, entrust the metal processing personnel to make a hoop, the hoop has been prepared to connect the pipe with the same diameter of the pipe, draw a circle in the iron pipe, drill the row of holes with a pistol, the smaller the hole spacing the better (not easy to damage the main pipe).There will be a gap in the middle of the main pipe on the hoop, so there needs to be a seal (eraser) in the middle.

Don't be eye-catching, then the dirty water from the upper floors may pour back into your house.

Besides, even if you take an eye at the lowest position, you can't clean the water in your own house.

It's troublesome.

If you have to fight, just cut a section of the sewer pipe against the ground and install a tee.

It is best to find a construction project in the middle of the night when everyone is sleeping, otherwise there will be too much sewage on it.

I've been a plumber for 20 years in a water company, and I've done a lot of that.

First draw a circle with chalk on the cast iron pipe (the size and diameter should be slightly larger than the sewer pipe to be installed) to make a mark, and then use a drill bit electric drill (remember that it must be the kind of electric drill that can drill iron, and it is not possible to drill concrete) drill an hole every 1cm on the mark line (the denser the eye, the better), and be sure to drill through; After all the holes on the ring are drilled, hit inward with a hammer hammer in the center of the ring (the force is moderate), because the cast iron is fragile, after a few blows, it will break according to the eye circle, and a round hole appears.