|“The intrusion of roots in to sewers
is probably the most destructive single element that faces those maintaining
a wastewater collection system,” says the U.S. EPA Environmental Protection
There are more than 2.5 billion feet of sewer pipe in
the United States, and 60% of all collection systems are made up of pipe
with a diameter of 8 inches or smaller.
The potential for root intrusion
to inhibit flows, produce stoppages and damage valuable pipe is enormous.
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.
Roots Grow Once 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 root moves best through loosely
The most common practice to lay sewer pipe is by open
trench. The back-filled soil offers a good growing medium for roots.
Because the flow in sanitary lines 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 root to follow. If even a vapour leak exists in the pipe, the root
concentrates its efforts at that point. Since some pipe joint compounds are
of nutrient material them selves, the root may entirely girdle the joint
before entering the pipe.
Roots Allow Accumulating Debris
Once inside the sewer pipe, the root takes on the appearance of either a
“veil” or a “tail” type structure. If flows in the pipe 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 roots by cutting or tearing tend
to increase regrowth similar to pruning a tree. Removing roots inside the
pipe solves the immediate problem of stoppages, but does nothing to retard
the growth or destroy the roots outside the pipe.
|This removal, regrowth and removal
cycle of cutting and tearing roots generally destroys the structural
integrity of the pipe.
fumigants present the most effective method to destroy roots and inhibit
their regrowth without affecting the above ground plant life.
is a root control herbicides that enters the sewer as a foam. Only roots
within the pipe and a short distance outside the pipe are affected. Trees
and shrubs immediately above ground are not harmed.
The U.S. EPA has stated, “No other method of control approaches the
effectiveness found in…Vaporooter.”
Vaporooter; Prevents Regrowth
Vaporooter can destroy existing sewer roots and prevent their regrowth for
an average of three years without harming trees or plants.
throughout the United States have discovered Vaporooter not only controls
roots, but it is cost-effective compared to other maintenance methods.
analysis of your collection system by and authorized Vaporooter
representative will substantiate the economical and preventative maintenance
advantages of using Vaporooter.
Tree root growth is slow but over
time can often exceed the growth expectations and requirements. This
tree is more than
twice the size of the rest of the original
The tree roots have broken into the sewer and have
two over flows in two years.
Tree roots will destroy
infrastructure. This foot path is 100mm thick and is displaced by
150mm. It has been attended to by council on two previous occasions.
This same power applied to sewer assets creates displacement,
resulting in inflow of ground water hence increased treatment costs,
exfiltration of raw sewerage into the water table and blockages
resulting in performance failures, overflows, inconvenience to
customers and costly repairs to sewer assets
Inappropriate selection of trees
for the beautification of residential landscapes can result in
the premature deterioration of underground assets. The roots on these
trees may be two to three metres deep but may have spread across an area
several times larger than the drip line in search of food and moisture.
||Each time you cut roots, like pruning a tree, they
will "bleed" the
sap to repair the damage and then regrow more