How to install drainage pipes with the correct fall? OHOB Training Academy

The importance of calculating the correct fall gradient for pipes when installing underground drainage is major. If your fall gradient is too steep solids may not pass through, and if the fall is too level then blockages may occur. In this video Cristian, a ground worker for O’Halloran & O’Brien, demonstrates and explain how to calculate and install drainage pipes with the correct fall gradient.

This video is in our 'How to install underground drainage' series. Watch all of the videos in the series to get a good beginner's understanding of how drainage systems should be installed in the UK.

Here at Drainfast, we have partnered with the OHOB Training Academy to produce a series of videos to show how to install underground drainage for beginners and how to begin a career in the construction industry.

The O’Halloran & O’Brien Construction Training Academy is a world-class training facility tailored to deliver excellence and replicate a construction environment, providing multi-dimensional skills training interventions to the highest standards.

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[marctronson]

Once you have measured the fall from.one end to the other, just pull a string line on the top of the pipes from collar to collar to make sure the fall is consistent. Easier and quicker tha n trying to guess with a spirit level

[bakker]

So what happens when the ground sags? Will the gravel stay in place?

[lIII]

Why does the pipe need the flexability? You stated at the elbow to place a material to prevent the concrete from sticking to the pipe.

[jugpuvo]

Don't you think slope is too much. I use 2 inches for 6 metre pipe

[roybatty]

So you want to lay it at a slope but check it's flat with a level?

[hanshichen]

should make slope from base then lay the pipe

[Boxingfanatic-fbzg]

Isn't it Better practice to use mf elbows and pipe with collars. So the male end of elbow can go into the collar end of pipe and so on.. less chance of getting a leak.. the was you've piped that up the rubber seal is under stress from passing water.

[vigalway]

If some inspector passes this ….he doesn’t know what he is at either .
Don’t be said by this video .

[qdiqjpm]

No you set a Lazer set fall in the Lazer do it right these lads haven't a clue