Rodding access help needed

[James1979]

Hi, I need to add rodding access into my soil pipe (under the floor boards downstairs). Unfortunately the current pipe is cast iron and I'm told by my plumber is 5 inch or 130mm diameter. I'm having a nightmare trying to find the best way of doing this with this diameter pipe. Do I cut a section out then piece it in with plastic and use a flexi coupling at each end, do I cut and piece a cast iron access piece. Can anyone advise on the best way to add access into this cast pipe? For some reason this diameter is very hard to find fittings to suit. The only plastic access I can find is 4 inch and will therefore reduce the pipe at this point which could lead to potential blockage issues?? Any help or thoughts would be appreciated.
Thanks!
James

 

[snowhead]

How has the figure of 5" been arrived at?

 

[rocketmanbkk]

& also why are you doing it & not your plumber?

 

[ShaunCorbs]

usa or uk?

 

[James1979]

UK, also, both very good questions. The figure 5 inch is what my plumber has told me but I will check this as I'm finding it very difficult to source 5 inch pipe so I'm not confident it is exactly 5 inch. Also, my plumber will be doing the fitting, however I'm really up against time with this so am trying to source the materials so he can do the job urgently. As the diameter of the pipe is unusual he is also trying to work our the best way without having to use any reducers to slim this area of pipe to normal 4 inch pipe due to potential blockage issues. If anyone has an idea on what they would use to solve this I'd be pleased if you could share. Many thanks again!

 

[rocketmanbkk]

110mm pipe with access panel with a ds103 coupler at each end to connect plastic to iron? That's what I'd do with clay. Never seen cast iron underground.

 

[ShaunCorbs]

5inch fernco couplings

 

[rocketmanbkk]

5inch fernco couplings

Yep.

 

[Unregistered]

Neither had my plumber that's what's confused the issue, appreciate your comments, the flexi couplers with 110mm plastic access piece is what I've got so far, but he had concerns reducing the internal diameter of the pipe could cause a block. Without cutting the pipe I can't be sure what the internal diameter of the cast is but at that stage I'm kind of commited!

 

[ShaunCorbs]

Neither had my plumber that's what's confused the issue, appreciate your comments, the flexi couplers with 110mm plastic access piece is what I've got so far, but he had concerns reducing the internal diameter of the pipe could cause a block. Without cutting the pipe I can't be sure what the internal diameter of the cast is but at that stage I'm kind of commited!

just get a piece of 5" steel pipe (will be thiner than the cast) so wont reduce the dia