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PVC Pipes Blocked by Hills Weeping Fig
The Hills weeping fig (ficus microcarpar var.) is a beautiful tree which in some areas provides a shady archway for many streets in our Sydney Eastern suburbs.
But why are the residents of these streets pulling out their hair?
The Hills weeping fig is like Jekyll and Hyde.
Dr Jekyll brings shade in summer; tree lined streets become a breezeway, cooling our homes as their majestic branches cast shade and protect us from the searing summer heat, attracting birds to feed on their fruit twice a year.
But, Mr Hyde is lurking. Those same fruit bring flying foxes…and other mysteries.
My interest in this tree is the power of its root system. Their reach is widespread, sometimes 3 or 4 or more times wider than they are high. The root system will move stone walls, lift concrete footpaths and driveways and of course invade sewer and stormwater pipes. The roots from this tree just keep on coming after they are internally pruned with an electric eel or “Rattlesnake” high pressure water drain cleaner.
Last week we attended to 4 tree root sewer blockages directly caused by the Hills Weeping fig.
The 2 blocked sewer pipes that particularly interested me were PVC sewer pipes.
Why is that interesting, I hear you ask?
Well… tree roots don’t grow into PVC pipes! …..or do they?
The Kensington blocked drain was in an established housing estate about 10 – 15 years old. The townhouse in question had no previous blocked drain history. The Hills weeping fig was about 30 metres away. Its root system had grown up to this house and had actually grown into the PVC pipeline through a screw-on cap that we plumbers call a cleaning eye. The fine roots had grown into the cap thread and multiplied inside the pipe thus causing the sewer blockage.
The Bellevue Hill blocked sewer was similar.
This house was built during the year of Sydney’s 2000 Olympic games after the long term owners, were tired of having blocked sewer pipes every 3 months, and tree roots “growing up through the back of the toilet”, amongst other reasons.
During the rebuild all the pipelines were installed in PVC pipes and fittings. The house finish was state of the art plumbing fixtures, with beautiful sandstone tiles around the outside of the house. All the pipes were concealed! No cleaning eyes! Why would we need access to the pipes as they have all been installed in tree root proof PVC? The nearest fig tree was 30 odd metres away.
Well, what started as a simple blocked floorwaste, grew to removing that beautiful toilet suite to clear the blocked sewer pipe. We used the “Rattlesnake” high pressure water drain cleaner to remove tree roots from the blocked pipeline. When the blockage was cleared we carried out a camera survey of the pipeline. About 14 metres downstream the camera showed the remnants of the cut tree roots, but just as important, our drain camera survey showed the PVC pipe had been squashed. What was a round internal pipe, was now oval shaped with a crack in at least 1 of the fittings.
Who said tree roots don’t grow in PVC sewer pipes?
Beware Mr Hyde!
https://www.thelonedrainerandpronto.com.au/vaporooter.php
Hills Weeping Fig Tree
Vaporooter Guarantee
Blocked drains are a major problem – any way you look at it!
Tree root invasion of sewer lines is a common cause of such blockages — BUT, when left unattended, tree roots will cause major damage to your sewer pipes (which, as you might imagine, can be far more troublesome than just any old blockage, not to mention the resulting sewerage backflow).
Replacing broken or collapsed sewer pipes can be a VERY expensive exercise…
Thankfully, there is a solution!
The best solution available is Sanafoam Vaporooter. When applied to sewer lines correctly, the foam coats the interior of the affected pipes, seeping through any fine cracks which may have been created by the invading tree roots, and killing off any roots it comes into contact with. Vaporooter is so effective, that we guarantee the results for 12 months…
Vaporooter: The BEST solution for tree roots in sewers!
https://www.thelonedrainerandpronto.com.au/vaporooter.php
What Happens When Tree Roots Grow In Sewer Pipes
The intrusion of tree roots in sewer pipes is probably the most destructive single element that faces those maintaining a sewer collection system today.
Sewers are ageing expensive assets that only attract public attention when they fail. There are more than 35,000 kms of water and sewer pipes in Sydney and 60% of all collection systems are made up of pipes with a diameter of 9 inches (225 mm) or smaller. The potential for tree root intrusion to inhibit flows, produce blocked drains and damage valuable pipes, is enormous.
Tree roots normally do not grow underwater and seldom cause problems where ground water covers the pipe. But in most areas, this is not the case.
Tree Roots Grow One Cell at a Time
When a seed germinates, it adds one cell at a time toward the best environment from which it might extract nutrients and moisture. The growing point of a tree moves best through loosely cultivated soil.
The most common practice used to lay sewer pipes is in an open trench. The back-filled soil offers a good growing medium for tree roots. Because the flow in sewer pipes is a higher temperature than the soil, this causes a condensation to appear on the crown of the pipe.
As the warm moisture from the sewer pipe evaporates up through the soil, the vapours offer an excellent trail for the tree roots to follow. If a vapour leak exists in the pipe, the roots concentrate its efforts at that point. Since some pipe joint compounds are of nutrient based material themselves (like rubber rings or sand cement mix), the root may entirely girdle before entering the pipe.
Roots Allow Accumulation of Debris
Once inside the sewer pipe, the root takes on the appearance of a “veil” or “horse tail” type structure. If flows in the pipes are fairly constant, the root mass hangs down like a veil to the normal flow level where they accumulate deposits of grease, slime and other debris.
Conventional methods of removing tree roots by cutting with an electric eel or a “Rattlesnake” high pressure water drain cleaner tend to increase regrowth; similar to pruning a tree. Removing tree roots inside the pipe solves the immediate problem of clearing the blocked drain, but does nothing to retard the tree root regrowth or destroy the tree roots outside the pipe.
This removal, regrowth and removal cycle of cutting and tearing roots can destroy the structural integrity of the pipe.
Herbicide Fumigants
Herbicide fumigants present the most effective method to destroy tree roots and inhibit their regrowth without affecting the above ground plant life. Vaporooter is a root control herbicide that enters the sewer as a foam. Only tree roots within the pipe and a short distance outside the pipe are affected. Trees and shrubs immediately above ground are not harmed in any way.