The standard invert depth for the plant must not be exceeded unless the specific ground condition checks have been made and the installation appropriately modified by the use of extension risers
When using an extension, you must follow the instructions for a wet ground installation.
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If you are not satisfied with your purchase you can return it to us within 14 days for an exchange or refund. More info.
600x450MM Single Riser Kit, 600x450MM Twin Riser Kit, 600x450MM Triple Riser Kit