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Useful Facts And
Figures
1 Cubic Foot = 6.25 Gallons = 62.5 Ibs
1 Cubic Foot = 25 kilos
1 Cubic Metre =35 Cubic Feet
1 cubic Metre = 220 Gallons =2200 Ibs Or 1 Ton
1 cubic Metre = 1000 Kilos
10 Litres = 2.2 Gallons
1 Gallon = 4.5 Litres
1 Gallon = 10 Ibs
1 Gallon = 4.5 Kilos
Pump running costs, 100 watts @ 20p KWH per week
100w x 24hrs x 7 days = 17 KWH
ie, 17 KWH units of elec cost £3.40
ie, 1 watt costs 3 ½ P per week
continuous pumping,
Measuring Liner Size,
(Length of hole +Double depth +1 foot) By ( Width of
hole + double depth + 1foot)
eg, Hole 6x4 Depth 2 feet
= ( 6 + 4 + 1) By ( 4 + 4 + 1)
= 11 feet By 9 feet
To calculate cost at cost per square foot, eg, 60P
Multiply cost by total length of liner by total width,
is, 11x9 = 99 by cost per square foot
= 99 x60P
= £59.40
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