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![Filename=concrete_rings.jpg
Filesize=47KiB
Dimensions=320x225
Date added=Apr 04, 2007 concrete_rings.jpg](albums/userpics/10489/thumb_concrete_rings.jpg)
Concrete rings for sewerThese come in various sizes. These are 75cm inside dia., 50cm deep, hold 220 litres each and cost 90 baht each. Calculate ?€ x radius?² x depth, to get the volume. We use two silos of four of these rings; the silos are linked for 1st and 2nd stage processing. They will be sealed inside with bitumen paint. That gives us a total of 1,760 litres which is more than enough for a small household. Ready made glass fibre tanks of this capacity cost about 8,000 baht. Another $200+ saved!jazzmanApr 04, 2007
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![Filename=septic_holes.jpg
Filesize=251KiB
Dimensions=637x480
Date added=Apr 03, 2007 septic_holes.jpg](albums/userpics/10489/thumb_septic_holes.jpg)
septic tanks 1Digging the holes for the septic tanks. These are not seepage tanks - the treated water will be piped to a leach (soak away) system on the land about 35 metres away.jazzmanApr 03, 2007
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![Filename=grease_trap.jpg
Filesize=196KiB
Dimensions=640x452
Date added=Apr 03, 2007 grease_trap.jpg](albums/userpics/10489/thumb_grease_trap.jpg)
Grease TRapThe grease trap is an essential part of a well designed waste water system. They cost nearly 3,000 baht to buy. Jazzman's cost less than 100 baht to build - another $100 saved!jazzmanApr 03, 2007
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