Dock
Bubblers & Deicers
Simple ways to
protect your dock from pack ice damage and heaving winter lake ice.
Ever since I moved
out to Thousand Island country and was surrounded by lakes with pond
owners or lake cabin owners with docks and boat cribs I have been
asked about protecting docks from ice damage. What I have learned
over the years about installing a simple do it yourself dock system
is that there are many different systems available that do basically
the same thing.
The idea
behind keeping ice away from the dock, boathouse or pilings is to
reduce the damage caused by heaving ice floes and ice pressure buildup
that can actually shift dock pilings and boat house structures resulting
in some expensive repairs. I am often asked if it is possible to build
or put together a cheap dock bubbler system and the answer is always
"Yes!"
The principle
of a keeping a dock or marina clear of ice is to ensure that the natural
crushing pressure of ice is not able to squeeze the structure. Ice
is so powerful that it can literally lift lake bed pilings out of
their footings and toss them about like sticks. I have seen large
yachts tied up in large Eastern Seaboard marinas suffer thousands
of dollars of damage due to ice.
The sad part is that almost all cases of ice damage and dock damage
are a result of negligence by eh owner or sheer laziness; installing
a homemade dock deicer or dock bubbler is not really difficult but
the key is to start preparing components and supplies early enough
in the season, October or November, to not get caught without a viable
system when the cold snap first falls and often surprises!
While ice usually forms in shallow or areas in lakes and ponds without
circulation it is important to remember that early ice formations
can occur in November in some areas.
While typical ice thickness will not maintain a constant spread until
December in most Northern Latitudes the freezing of ponds can occur
without warning so it is better to buy an inexpensive dock bubbler
or build a dock deicer before it is in January and the ice is thicker
than you'd like!
Types
of deicers, ice eaters and Bubblers
The principal types of automatic systems for protecting marinas
and docks from ice damage can be broken down into two main types:
the submersed thruster or agitator and the dock bubbler.
Agitators involve placing a heavy-duty submersible motor that drives
a rugged propeller in continuous duty to draw warm waters from the
depths of the pond or lake towards the surface.
The warmer waters at the bottom of the pond usually maintain a temperature
of around 4 degrees Celsius or 39 Fahrenheit and by bringing them
rapidly to the surface in a directed thrusting stream they can keep
large areas of open water even in the coldest of winter temperatures.
I have seen this sort of ice-eater literally open up solidly frozen
areas in only a few hours.
Kasco Agitator Thrust Deicers
Mounted in either a vertical or
horizontal position, the de-icer circulates water to the
surface, causing turbulence that reduces or eliminates
ice formation.
Affiliate link: More
info |
3/4
HP 3400D - 25' cord
Kasco
3/4 HP with 25 foot cord
More
info |
1
HP 4400D - 25' cord
Kasco
1 HP with 25 foot cord
More
info |
Bubbler
Hose
Weighted
de-icer airhose/bubbler tube for deicing small and large
areas. Weighted 1/2" I.D. tubing requires only 1 CFM per
100 feet (0.01 CFM per foot). Single runs of up to 200'
can be used with even bubble flow. Flexible tubing has
a lead-wire encapsulated in poly to act as a weighted
keel, keeping the deicer tubing firmly on the bottom.
More
info. |
125'
Bubbler De-Icer Hose
One-hundred twenty-five feet of weighted
deicer bubbler tubing
Price
and options |
250'
Bubbler De-Icer Hose
Two-hundre-fifty feet of weighted deicer
bubbler tubing
Price
and options |
Dock
Bubbler Packages
Price
Includes USA Shipping
Using the proper diffuser or perforated
hose for bubbling makes all the difference in protecting
a boat or a seawall.
. More
info |
Medium
Dock Bubbler
Includes
125' weighted bubbler hose, 1/3 HP piston compressor,
50' weighted feeder line, clamps and connectors included
More
Info |
Large
Dock Bubbler
Includes
250' weighted bubbler hose, 1/2 HP piston compressor,
100' weighted feeder line, clamps and connectors included
More
info |
|
This sort of
deicer works best when you have deeper waters around the dock but
keep in mind that even an agitator aimed at the shallow shoreline,
if it originates in waters of say 12 feet deep, can create a large
opening under the entire dock structure.
The size of the opening in the ice depends on the overall ambient
air temperature but typically even a 1/2 HP or 3/4 HP device can
open up a hole in the ice up to 60 feet in diameter.
When it is desirable
to prevent ice damage in large marinas or yacht clubs over winter
several units can be combined together to create a huge current that
will open upon incredibly large amount of water.
These units can either be suspended below the dock or pilings by nylon
mooring ropes or can be attached to some sort of dock mount system.
Several manufacturers, like Kasco Marine, offer high quality dock
mount apparatus that allow you to strictly control the angel of attack
of the deicer unit by using a graduated bracketing system.
When a dock
is in shallow waters the popular deicer or ice eater may not work
as well because this sort of motor needs to push warmer waters to
the surface in order to be effective. When waters are 6 feet deep
or less there is less temperature stratification in the water and
even the water at the very bottom can be too cold to effectively melt
surface ice. While the agitation of the water will keep a small hole
open even when trying to deice a shallow area the diameter of the
hole is typically smaller.
In shallow waters the most popular system is called a bubbler or a
dock bubbler. This sort of system involves an air compressor on the
dock or shore mounted that blows air into diffusers or a diffuser
line like a diffuser line, de-icing hose or bubbler line or deicer
tubing which is a weighted perforated tubing that releases tiny bubbles
down the length of the tubing.
The long linear length of bubbles creates a constant movement of water
and this steady flowing curtain of bubbles ensures that there is no
ice formation along the dock structure or boat slips.
Previous generations
of weighted tubing were lead-lined stiff plastic PVC tubing with die
cut slits ever 12 to 18 inches. I have found this tubing to be susceptible
to kinks and ruptures not to mention the lead metal keel that was
designed to keep the tubing on the pond bottom actually used a poisonous
metal which has since fallen out of favor with anyone concerned about
the potential health effects of heavy metals in our water.
Newer developments in diffuser tubing have seen improvements in efficiency
and safety by using all PVC diffuser tubing that contains zero metals.
PVC is a polymer of vinyl chloride and is insoluble in most organic
solvents. Such diffuser line, de-icing hose or bubbler line, being
constructed of vinyl resins, which are used in soft flexible films
for food packaging and in molded rigid products, such as pipes, fibers,
upholstery, and bristles, is a more environmental choice. Plus, the
ability of such new diffuser tubing to remain flexible in cold temperatures
makes it's use as a deicer tubing much more practical.
While the installation of such a dock bubbler system can be more labor
intensive than the relative ease of installing a dock deicer, there
are advantages.
A dock bubbler,
because it uses an air compressor or regenerative blower, will cost
less in electrical consumption compared to an ice eater agitator.
Submersible motors run from 3 amperes to over 20 amperes depending
on the horse power of the motor. An air compressor for a dock bubbler
will run between 2 and 10 amperes.
When using
diffuser lines to protect your dock from ice damage there will be
some fairly common installation procedures: place the air compressor
in a ventilated cabinet or shed.
Some turnkey deicer systems come standard with a lockable cabinet
designed to resist salt water and rust but some cheap deicers or homemade
deicers do not include or even mention the need for a protective housing
for the compressor.
In our northern climates where winter temperatures near the Great
Lakes can be a bone chilling minus 30 degrees for weeks on end it
is essential to protect the compressor.
I have seen some inexpensive dock Bubblers that appeal to the do it
yourself deicer types that claim that the compressor can sit on the
dock without worry but that is a recipe for disaster!
The compressor could be damaged by severe weather or in the case of
a power failure could be destroyed by the freezing of any condensation
in the compressor housing so don't be fooled into thinking a small
dock can use a small linear air pump that sits on the end of the dock.
From the blower or air pump a weighted line runs into the water. The
line can be buried but if you are using a thick walled and high bore
airline you can often get away with surface layout.
At the end of your airline you attach the diffuser line, de-icing
hose or bubbler line or diffuser line which typically runs the length
of the dock in need of protection. I sometimes recommend running multiple
lines of tubing or a perimeter loop depending on the layout of the
boathouse and boat slips involved.
Remember that variations in depth can affect the bubble flow of the
diffuser tubing so it is better to use multiple lines if there are
major deviations in depth around the marine or private dock. Sometimes
even a variation of a few feet can inhibit the correct flow of air
in a tubing. Since one PSI is equivalent to 2.3 feet of depth a difference
of few feet could mean that air flow in the weighted tubing is restricted
in the deeper areas and no bubbles are being released.
I have seen dock bubbler systems that include single lengths of tubing
meant to be placed in a loop of over 400 feet and I have often seen
large areas with no bubbles in such installations especially when
undersized linear compressors are used. The temptation to buy a cheap
bubbler are everywhere on the Internet but it is important to understand
the limitations of the technology before leaning towards buying the
cheapest system.
Of course, in larger marina projects, where hundreds of boat slips
are involved and the dock structure is hundreds of feet of complex
maze-like boat stalls a larger, more professional grade system is
required. In projects like these we will install large high pressure,
high CFM compressors to feed multiple lengths of 1/2 inch or 3/4 inch
diffuser tubing. 3 HP to 5 HP compressor are not uncommon using a
series of control manifold valves to control the airflow into multiple
lines of diffuser bubbler hose.
Regardless of the system you choose it is wise to control the operation
of the dock deicer or dock bubbler with a thermostat control that
will only initiate operation of the motor when freezing temperatures
warrant operation: usually when the air temperature is gist below
the freezing threshold.
These inexpensive thermostats measure the outside air temperature
and engage the air compressor or submersed thruster only when it is
required. Another benefit of using a thermo control unit are the savings
in electricity costs associated with the deicer.
Building
your own deicer, do it yourself dock Bubblers
Send us
an email describing your
dock, marina or boathouse and our design team will submit an affordable
bubbler plan or deicing strategy or
take a look at our dock
bubbler packages
Saving
money is something most of us want to do and when confronted with
the cost of a commercial de-icer I often hear people ask how they
can build a cheap deicer or as me how to build a dock bubbler. It
can be done but before you consider taking on the task ask yourself
if it is really worth the time and effort to buy the parts required
and, of course, the actual labor it entails to build a pond bubbler.
Industrial
& Commercial Deicing
Our
deicing experts have years of experience with design and installation
of bubblers and de-icers in mining, stormwater, gas and oilsands
and tailings ponds, ski hills, municipal docks and marinas
and dam deicing and pumphouse deicing.
Using the most efficient systems we can design or recommend
the ideal deicing or bubbler system for any job, large or
small.
Please contact
us by email for industrial deicing jobs.
|
If your goal is
to protect your dock and eliminate costly repairs from winter ice
damage then you should weigh the cost benefits of purchasing a pre-designed
system from a local expert.
If you are gung-ho about doing it yourself it is really not rocket
science! Building a dock bubbler involves buying a cheap pump, adding
some airline, and then adding a diffuser hose or even diffuser discs
at strategic points under the dock or boat slips.
I've seen small deicers built for less than $600 dollars but I've
also seen such systems fail due to poor design and costly boat and
major dock repairs resulting!
Using standard PVC plumbing pipes and drilling holes with a hand drill
is one way to avoid buying professional grade diffuser tubing but
one errant drilling of a hole can result in catastrophic failure of
the system. Pumping air through an open ended pipe, creating large
coarse bubbles, will work to an extent but often the results are hit
and miss.
Today's systems have undergone years of testing and while the temptation
is often there to build a homemade bubbler is often nagging at our
thrifty instinct I have seen such desires lead to more expenses that
would have been involved in buying a dock bubbler from a reputable
and experienced supply store.
Buying
a dock bubbler or a de-icer
Buying a dock bubbler or a de-icer requires a certain level of expert
knowledge. The Internet is full of websites that sell dock Bubblers
and promote their simple systems and most claim that they do the
job without issue. I have seen disappointment in many purchases
because the retailer was more keen on selling their product than
actually customizing a bubbler system to meet the specific needs
of the clients particular situation.
In my years in helping solve pond issues I have seen my share of
deicing projects. I don't sell de-icers; I leave the final shopping
to those with the hard earned money.
There are so many options when it comes to dock deicing that it
is crucial to use due diligence and to look for the best deal. But
beware, the best deal isn't always the cheapest. I have seen some
people save a few hundred dollars by buying a cheap deicer on eBay
but then they got no service or tech support when things go wrong.
My advice has always been: deal with a company that does more than
sell products; make sure they have an actual store, with experienced
technicians and a track record of knowing what they are doing.
There is more to doing the right thing than saving a few dollars;
getting good advice and information is worth much more in the long
run.
Shallow Dock
Bubbler Systems
When using surface agitaors or linear bubbler hose as a bubbler system
is not practical or too costly the diffused air de-icing systems can
be installed eaily and provide effective protection from ice damage.
Instead of long lengths of bubbler hose these systems use a more standard
diffuser that sits on the bottom near the structure needing protection
that releases larger coarse bubbles to the surface which can create
less ice buildup and open waters to mitigate ice pressure damage to
pilings or boathouses.
More
info on diffused air dock protection systems

Dock
Bubbler & De-Icer Product & Website Reviews
We've seen
all manner of websites and products and here are some reviews of popular
products and websites from companies you have likely heard of. All
website reviews are based on our reviewers experience with the websites
being reviewed that offer Bubblers or deicers and their overall knowledge
of deicer systems and should be considered as opinions and not scientific
or even valid. May the buyer beware in all cases and ask questions
before you buy.
Kasco Marine,
Inc. De-Icers
Kasco has been
a leader in submersible deicers for years and this website was popular
amongst our testers. Good source of information on deicing docks and
all specifications for the products.
They have dealers throughout North America and our review panel found
it easy to contact them to find a reliable dealer in any area in Canada
or the United States. No pricing, typical of a manufacturers website,
but overall it instilled confidence in our test subjects.
Kasco Deicers are available pretty much everywhere from Ebay to just
about every mom-and-pop website on the web.
A little digging by the consumer can find some incredibly low prices
on these systems. Make sure you purchase from a reputable company
so you will have after sales service in the event of warranty issues
or problems with your deicer.
From
the website: http://www.de-icer.com/
"Kasco De-Icers have been trusted to protect property and equipment
for over 40 years. Kasco De-Icers have been proven to prevent ice
formation around docks, boats, equipment, etc. from areas with minimal
ice formation to over 300 miles north of the Arctic Circle.
You can rest assured, your Kasco Marine De-Icer will protect your
property during the harsh winter months. Kasco De-Icers are also used
during non-winter months for improved water quality and water movement.
Kasco De-Icers can eliminate stagnant water areas and keep trash and
debris from entering your marina, boat house, or dock area. Use your
Kasco De-Icer year round for improved water quality during summer
months and for preventing ice damage during the winter months."
Amazon Affiliate Kasaco Link: Special
pricing on Kasco deicers at Amazon
Ice
Eater
The range of websites
offering the ice eater shows that it is a popular low-cost deicer
system and our review team was quite impressed by the construction
presentation of the ice eater system.
Bearon (formerly IceEaters were made by The Power House, Inc). uses
only the finest materials in our patented product. By example, the
end bell is made of solid brass, our housings are stainless, and the
venturi shroud, which not only directs water flow, but protects the
unit if it's dropped is made from schedule 40 PVC. The Ice Eater is
actually more efficient to operate than Kasco.
The Bearon Ice Eater can clear a larger area than Kasco hp. for hp.
The units don't require a dock mount, a cost saving feature. The material
used in these products are superior to many other vertical lift unit.
They one of have the best warranty return histories in the industry
with some units still in operation after 20 years of use (i.e.. Cutter
Marine in Maryland). They have established over the last 28 years
a strong dealer-distributor network throughout North America.
"Ice Eater's 3/4HP Ice Eater propeller
draws up warmer subsurface water and deflects it to the surface creating
a constant circulation of warmer water that prevents ice formation.
Ice Eater will melt existing ice.
Unlike other de-icing units, Ice Eater requires no additional hardware
in order to obtain the desired deicing pattern. Ice Eater is shipped
complete with suspension lines. It can be taken out of the box, hung
in place and plugged in.
Ice Eater may be hung from a pier or boat. Two to three feet is the
average operating depth. For optimal use and placement contact your
Local Ice Eater Distributor by clicking the link above.
DESIGN FEATURES: The design of the Ice Eater's venturi shroud (housing)
with outwardly flared ends draws warmer water from greater depths
than other conventional de-icers. The shroud is submersible below
the surface either vertically or angled from vertical. A set of mounting
holes at opposed positions on the flange allows the lines to be attached."
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