The Art Of Water Extraction
Gordon Hanks
Is there art and skill
involved in water extraction, or is it simply a matter of riding around
on a specialized extraction tool and calling it a day? I think we
can all agree that there is both art and skill involved. No matter
what the equipment, the technician will always do better if he has
training and experience. He will also do better-much better-if he
cares enough to put the proper time into the procedure and uses the best equipment for the job.
Heaven forbid that you or your technicians
work for a company that says "Give the carpet a quick once over
extraction. If we leave some water in, so what, we will get more
money for the equipment rental on the back end." I am afraid this
happens far too often.
As I have been developing drying equipment
over the past few years, I have had occasion to participate in dozens of
water damage restoration jobs with several different restoration
companies. Overall, their biggest weakness was poor water
extraction resulting in extended drying times.
While it may be true that you can pick up
extra money on the equipment rental, to me it is a sad concept when we
don't give the customer our best. Extended drying time results in
greater cost to the insurer, more inconvenience for the customer, and
increased likelihood of secondary damage and dangerous conditions from
the water and related microbial growth.
"In place" drying where the carpet and pad
are extracted simultaneously and the pad remains in place for
drying, is a well established and proven system for drying.
Conventional drying systems using air movers and dehumidifiers, as well
as heat based systems are both effective at drying in these situations
but both require excellent extraction to enhance drying.
Imagine putting a quart of water in a
pan. Blow room temperature air at it and see how long it takes to
evaporate. Now apply heat to it and watch it evaporate much
quicker. Now take your vacuum hose and suck the water out of the
pan - this is about 1,000 times faster than blowing air at it.
Thorough extraction on carpet and pad is like sucking the water out of
the pan and can save many hours or even days in the drying process.
Certainly we don't have space in this article
to describe complete and correct procedures for extraction but since
this is the Gadget Man writing we should at least look at the tools
available. Generally there are five tools currently in use for
flood water extractions;
-
Light Wand
-
Drag Wand
-
Water Claw
-
Hydro-X Xtreme Xtractor
-
Rover HVE
The SCRT W.E.T. study published in
August of 2003 scientifically studied water removal using several
different tools on varying types of carpet and pad. The Hydro-X
came out on top for overall performance with the Water Claw a close
second. However, it is important to note that the Rover HVE had
not yet been invented at the time, so it obviously could not be
tested.
Light wands, or "scrub wands" have been
around for many years. Used on direct glue down carpet as found in
many commercial buildings, the light wand will do a great job of water
extraction. Use it to try sucking water from the pad through the
carpet and you will be wasting your energy.
In years gone by, my preferred tool (and
about the only one available then) for water extraction was the weighted
drag wand. We would start with a 50 pound drag wand and then add
an additional 50 pounds of lead weights. It was somewhat difficult
to move and created a bit of strain on the back. The weighted drag
wand did extract a fair amount of water but never enough to consider
drying the pad in place.
In recent years the restorer's job of water
extraction has become easier and much more effective. Using the
Water Claw is a manual process but has proven very effective at removing
subsurface water from both the pad and the carpet. While i
wouldn't consider it a fast process, it is comparable to the time
required when using the ride on tools. The Water Claw is a needed
addition even if you own the ride on tools. It will fit into tight
places like closets or bathrooms and is more convenient on the very
small water losses.
The ride on tools (Hydro-X & Rover
HVE) have proven very popular and effective. I must say they are
fun to drive and obviously require little effort from the
operator. However they are not race cars and do require
patience. The pace must be slow to accomplish deep and effective
water removal. It is not unusual to need a second, third, or even
a fourth pass in extreme conditions to get maximum water removal.
Run over a corner of the room with the tool and lift the carpet to expose the
pad. Squeeze the pad to see how much water remains. This can
give you an indication of the number or passes it will take for
effective extraction.
None of these tools will work well unless the
extraction equipment hooked up to them is powerful and develops proper
air flow and vacuum lift. The Hydro-X is available with a self
contained vacuum system which is very effective. The other units
must be matched with extraction equipment that complements the
extraction abilities of the tool.
Choosing the best tool for your company can
be a challenge. You must consider your current budget but also
your potential for growth. Pembertons Interlink Supply
will have some or all of the tools for you to look at. They can
guide you and give you information on the features and benefits of
each. Go in and test drive the different tools. Talk to you
friendly competition and see what they are using and what they
like.
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