Top land drains Secrets
The size with the soakaway must be a minimum of 1m x 1m sq. x 1m deep beneath The underside of the incoming pipe. The stone infill ought to encompass the pipe and finish close to 100mm higher than it. An impervious layer must then be placed on the stone like thick polythene, tarpaulin, or even a mattress of concrete (A1 during the diagram over).In