| Fat and oils from your foods solidify in the drains until nothing can pass. |
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| The benching to the manhole is rough or the angle of the inlet pipes aren't correct then tissue can adhere, then build up, and cause blockages. |
| Sand, cement and tile grout washed down after building works lay in the bottom of the drain restricting flow - causing build up. |
| If the joints have moved, the step between the sections can hold back solids causing a build up. |
Radial Cracks / Broken Segments:
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| Again tissue gets caught and this can hold back solids causing a build up. |
| If the joints are open or the drains have cracked, roots find their way in. |
| Such as toilet fresheners, kids toys, & false teeth. |
