Bio-sand dihydrogenmonoxide filter I made a bio-sand water filter today.
I'm going to connect the rain water down pipe to it,
so the dust, bird poo, etc will be filtered out by the filter.
Swing top bin 60 cm tall x 30 cm side at the top.
Tap - just to be swanky. Actually it was easier to fit the tap than to bend the pipe.
Water head - 10cm water depth from lip of bin to tap outlet,
which is 5cm above the sand level inside.
http://www.cawst.org/index.php?id=128
Excellent site for information on low tech filter and pumping of water (IMHO)
with pdf's available to make yer own filter.
Filter diagram - my poor version of the diagram on the above site
I used the swing top bin because I couldn't find anything 90cm high,
except a 2metre clay drainage pipe in the builders yard for £62.
The sand cost £1.60 : the gravel cost £1.60 and a few pebbles from me garden
to cover the pipe end in the bin. Total cost - as in money spent today - £3.20.
The pipe could have been pvc, but I had the 15ml pipe handy,
the neighbour isn't back till saturday, so I've got the tap until then!!!.
The pipe was put through a 15mm hole in the bin,
but I glue-gunned a piece of thin pvc (gravy granule lid) to each side as well
to ensure a leak-proof job.
The flow rate is, at present, exactly 600ml per minute,
which is what the people of CAWST say their filters give too.
I suspect this is a standard flow rate through sand (can anybody confirm this please),
which is 36 litres per hour (864 litres/190 gall per day).
I'm going to connect the rain water down pipe to it,
so the dust, bird poo, etc will be filtered out by the filter.
Swing top bin 60 cm tall x 30 cm side at the top.
Tap - just to be swanky. Actually it was easier to fit the tap than to bend the pipe.
Water head - 10cm water depth from lip of bin to tap outlet,
which is 5cm above the sand level inside.
http://www.cawst.org/index.php?id=128
Excellent site for information on low tech filter and pumping of water (IMHO)
with pdf's available to make yer own filter.
Filter diagram - my poor version of the diagram on the above site
I used the swing top bin because I couldn't find anything 90cm high,
except a 2metre clay drainage pipe in the builders yard for £62.
The sand cost £1.60 : the gravel cost £1.60 and a few pebbles from me garden
to cover the pipe end in the bin. Total cost - as in money spent today - £3.20.
The pipe could have been pvc, but I had the 15ml pipe handy,
the neighbour isn't back till saturday, so I've got the tap until then!!!.
The pipe was put through a 15mm hole in the bin,
but I glue-gunned a piece of thin pvc (gravy granule lid) to each side as well
to ensure a leak-proof job.
The flow rate is, at present, exactly 600ml per minute,
which is what the people of CAWST say their filters give too.
I suspect this is a standard flow rate through sand (can anybody confirm this please),
which is 36 litres per hour (864 litres/190 gall per day).