
Blair Toilet. Image credit thestandard.co.zw
ZIMSEC O Level Combined Science Notes: Blair toilet
- This was developed by the Blair Research Laboratory

The Blair Toilet.
- It is a refinement of the pit latrine
- They use either a spiral/rectangular shielded door design to ensure the interior is dark and to ensure privacy
- There is a vent pipe which keeps the toilet ventilated making sure flies are not attracted to it
- The vent pipe also traps flies that enter into the toilet using a fly screen
- The lining is deeper to prevent burrowing by rats and other vectors
- The blair toilet is suitable in areas where water supply is limited
- They considerably reduce the fly and smell problem
- The lifespan of such a toilet depends on factors such as
- The depth of the hole, number of users and amount of water available
To access more topics go to the Combined Science Notes page
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