Entering an inspection hole from Sink

[Mirez]

Hi all! I've a project that I've meaning to get to for some time but I keep coming back to exactly how I should do the job.

The situation is that a previous owner converted the garage into a laundry room / gym. The exit from the sink and washing machine is taken through the side of the garage in regular waste pipe and then tacked along around the side of the house to a drain at the front - around 15m in total and somewhat ugly.

Now right outside the garage is a manhole / inspection pit which is about a meter deep and carries the bathroom waste on to the front where it joins up with the other drain. So, how's best to enter into the pit? It's in the middle of the driveway so I'll have to chop out some concrete and go in from the side but do I need to meet any regulations on doing this? My plan is to bore in about halfway up the side, any problems with this?

Edit: The old picture and a thousand words lol: Here you can see the white waste pipe running around the side and the inspection hole I want to bore into:

View media item 53603
The aim would be to sink as much of the pipe as possible so it would exit the plastic of the garage and drop strait into the concrete, entering the pit on the "top" side when viewing the pic.

 

[Hugh Jaleak]

If the pipe from the manhole goes back virtually straight under the plastic boards of the garage then you could dig there, expose the drain, fit a T and a gulley immediately outside the garage, adjacent to step. Redirect waste into new gulley.

Alternative, you could sink the waste under the concrete, and run it to the manhole, but it's not an ideal method and I doubt it'll comply with regs.

 

[Mirez]

Hi Hugh, thanks for the reply. The pipe from the manhole comes up from the bottom of the picture and does a 90 degree into the house at the manhole so there is nothing to T into unfortunately, I did consider your suggestion to the right of the hole but I don't much fancy digging down that far right next to my foundations!!

If burying the pipe breaks regs, can anyone suggest an alternative?

 

[Hugh Jaleak]

Ah, blows that idea. Other option then is to lay a new 110mm run from the chamber to outside garage, fit a gulley and drop waste into that. If it's just a gulley connection then BCO might not worry about having the pipe discharge over the benching in the chamber.

However, if you just run the waste (40 or better 50 mm pipe) under the concrete, and dont tell anyone then thats up to you! (It'll work, but may flag up as a problem on a survey if you wanted to sell the property in the future.)