Stormwater drainage pits are designed to prevent large amounts of waterborne debris from entering the public sewerage system. The drainage pits are fitted with grids or bars that are wide enough to permit the entry of water, although leaves, mower clippings, and small sticks may enter too. Over time, this accumulation of debris can encourage the proliferation of bacteria that will eventually become smelly and could harbour diseases.
If your stormwater drain pit becomes clogged it can overflow during a heavy downpour, causing flooding to your home and to public highways. If you allow your stormwater drainage pit to become blocked so that it overflows resulting in damage to your neighbours' home, you could find yourself liable for compensation claims.
For these reasons, it's very important that you keep your stormwater pit and associated drains clean and clear.
Tips on keeping your stormwater pit and drains clear
It's important to keep on top of the job of keeping your stormwater pit drain clear; don't leave the task until there's a storm when a torrential downpour could cause flooding.
Make clearing the drains a weekly maintenance task, especially during storm season and in the autumn when leaves are falling. This is particularly important if you have a lot of deciduous trees and shrubs growing on your land. You should also clear your stormwater pit drains immediately following a severe storm.
When you come to rake away leaves and twigs from the stormwater pit drain grate, don't attempt to take the grate off. Removing the grate could allow even more debris to fall into the drain pit and you might not be able to refit it securely. All you should do is pick up all the rubbish that has gathered on the top of the grate, leaving the cleaning of the pit itself to a professional.
A good method of trapping debris and preventing your stormwater pit drain from becoming overloaded during a downpour is to have gravel socks fitted. These fences act as simple filter devices, separating sediment, heavy metals and other undesirables from the water run-off.
Although you can keep the stormwater pit drain grate clean and clear yourself, a professional sanitation company should be called to periodically clean out your stormwater pit and associated pipework. They will also be able to set up gravel socks and other water diversion systems to relieve the pressure on your stormwater pit drains during storm season.
For more information, contact a business such as Able Liquid Waste Pty Ltd.