Sewage pipes must slope down 1/4 centimetre in order to drain properly. What is the required slope? Calculate the percentage grade of the slope. - Quora
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Sewage pipes must slope down 1/4 centimetre in order to drain properly. What is the required slope? Calculate the percentage grade of the slope. - Quora
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![How To Calculate Gradients [Easy To Follow Guide]](https://www.ths-concepts.co.uk/wp-content/uploads/2018/10/pipe_fall_gradient_ratios.png "How To Calculate Gradients [Easy To Follow Guide]")
How To Calculate Gradients [Easy To Follow Guide]
Connecting soil and waste pipes to below ground drainage
