Complex problem

[pianopete]

Hello again,

I have uncovered the other end of the drain that connects to the T junction i was talking about in my previous post. I have posted the pictures at .... drain photos

The first photo shows the WC joining onto a branch. The outlet goes roughly right to left. The other branch goes to a drain gully with a U bend trap. All in glazed clay.

Another pipe on top of the WC line connects into the gully. This carries rain water from the gutters and the kitchen/bathroom sink waste.

The first problem is the WC junction is cracked, it is joined to cast iron. I need to put a plastic joint in here. I am proposing to cut the cast iron below the t joint and put a plastic soil adaptor with a rodding point.

I need to extend the main drain line to the wall and fit a rodding point so that i can get a straight rod into the covered T junction i talked about before.

I need to remove the existing gulley and put a new plastic one in. I am proposing to put this away from the wall because i'm not sure there will be enough clearance. I will do this using a 87.5 tee on the main line.

I need to connect the waste outlet to this gulley. I was going to reduce the clay and connect into the gully. (a marley ug40x).

Once the extension is complete it will no longer serve the gutters and a new gutter line will be connected to the gully. It will only serve kitchen and bathroom waste.

I have made a diagram to show this.

Can you experts please comment on this and if there is a better way. I don't want to create a load more work for myself !!

[seanandruby]

it looks like it all goes into the same run, am i right? i would open them up and put in channels, slippers etc and turn it into a manhole then you can run your gullies to it. bench it up nice. please dont use "T junctions" with fowl, use oblique ( y junctions ). good luck.

[Tony McC]

Is this a combined system or are there separate Foul and Surface water systems on the property?

[pianopete]

hi, Its combined.

I have worked out another configuration to deal with this.

The waste outflow (light brown pipe on top) is taken into a straight through gully using a 45deg bend. The gully is needed because the pipe goes straight to the gutter. The gully outflow then makes a 180 turn on itself using 2 87.5 bends. It also descends on this bend to the level of the outlet pipe. A 45 oblique junction is inserted between the connection to the outflow. The 45 bend sticks up vertically and forms a rodding point. The connection to the WC remains as it is.

I can then rod straight through the outlet pipe. The short connections can be rodded at the gully.


here is a picture
v
\
<-----\-------*------ \
\ |
\ -----O-----/


O = gully
* = 45 junction with inlet pointing up for rodding