When installing our MultiDrain M100D channels there is an option to use channels with a built-in fall (slope). WHY? By installing the channels with a slope the velocity of the water within the channels is increased which encourages self-cleansing, which could mean less frequent maintenance. Also, sometimes the gradient of the land requires the channels to have a fall to encourage the water to flow to the outlet.
Our MultiDrain M100D Sloping channels start with a No. 1 channel which is 150mm falling to 155mm deep overall (130-135mm invert) and continue to a No. 20 channel which has an overall depth of 245mm falling to 250mm (225-230mm invert). Each 1000mm long channel falls 5mm (1:200) 0.5% gradient, so a continuous sloping run could be up to 20m long with a maximum 100mm drop over the 20m length. It is possible to extend this length by including constant depth level invert channels at certain points within the run, for example:
2 x M100D 0.0, M100D No. 1 to No. 10, 2 x M100D 10.0, M100D No. 11 to No. 20, 2 x M100D 20.0 would provide a sloping run of 26m.
For an overview of the different invert types available in our MultiDrain range, please refer to our article “Channel Invert Types” for further information.