The Blair VIP Toilet - EcoSanRes

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SITING THE uBVIP The site should be chosen by the family with assistance from the Environmental Health Technician and should be at least 30 metres from a well. The toilet site should be: *Down hill from a well or borehole – to reduce possible underground contamination of the water supply. *Where the soil is firm – to avoid possible latrine collapse *On slightly raised ground – so that rainwater can drain away from the site of the toilet *Near the house – for the convenience of the householders *Away from trees – so that air can flow easily over the pipe *The orientation of the structure - to provide the best privacy for the users Stages of construction The stages of construction are as follows: 1. Dig the pit. 2. Make the concrete slab 3. Line the pit with bricks and fit the cured slab 4. Build the superstructure Stage 1. Dig the pit Dig a round pit 2m deep and 1.7m in diameter. Dig the pit with straight sides and a flat bottom. 6
Stage 2. The concrete slab The concrete slab for the uBVIP is 1.2m in diameter and made with a mix of 12litres of Portland cement and 60 litres of clean river sand (1:5 mix). The hole for the vent is 110mm in diameter and the squat hole measures 300mm X 150mm. The vent hole is designed for a 110mm PVC pipe which is placed inside the structure. The 110mm hole is placed 110 – 112mm from the edge of the slab and the vent and squat holes are about 200mm apart. The arrangement of the holes are shown in the photo. The vent hole is made by using a short length (75mm) of PVC pipe as mould. The squat hole in this case is made using a specially designed steel mould. 12m of steel wire or barbed wire is required for reinforcing per (4 X1.1m + 5 X 1m + 4 X 0.6m).The slab is cast over plastic sheet or on levelled ground covered with sand which is wetted down. One level 10 litre plastic bucket contains 12 litres of material. One level 10 litre bucket of cement and 5 level buckets of river sand are used. Details of concrete slab for uBVIP with tubular pipe 7
Page 1 and 2: The Blair VIP Toilet Manual for the
Page 3 and 4: Start simple and upgrade - an expla
Page 5: Materials required The Upgradeable
Page 9 and 10: Stage 3. Line the pit with bricks u
Page 11 and 12: The brickwork is stepped in at each
Page 13 and 14: uBVIP Superstructures The concept b
Page 15 and 16: Finishing off the floor and entranc
Page 17 and 18: A fly trap The screened vent pipe o
Page 19 and 20: Upgrading the simple superstructure
Page 21 and 22: Stages of construction The slab ext
Page 23 and 24: The bricks are laid using the cemen
Page 25 and 26: The wooden frame The untreated and
Page 27 and 28: The vent pipe is added through the
Page 29 and 30: 1. Specialised pit linings Annexes
Page 31 and 32: 1c. Leaky brick wall lining In this
Page 33 and 34: 4. Making a simple hand washing dev

The Blair VIP Toilet - EcoSanRes

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