General Pipe Cleaners JM-2900 Installation Manual
JM-2900™ Gas Jet
Operating Instructions
Your JM-2900 Jet-Set gas-powered
water jet is designed to give you years of
trouble-free, profitable service. However,
no machine is better than its operator.
Read, understand and follow all safety
warnings and instructions provided with
the product. Failure to follow the warnings
and instructions may result in electric
shock and/or serious injury. Save all warnings and instructions for future reference.
SAVE THESE INSTRUCTIONS!
Jet-Set JM-2900™
WARNING! Read and understand all instructions.
Failure to follow all instructions listed below may result in
electric shock, fire and/or serious personal injury.
Replacement manuals are available upon request at no
charge, or may be downloaded from our website,
www.drainbrain.com. Instructional videos are available
for download on our website, and may be ordered. If you
have any questions or problems, please call General’s
customer service department at 412-771-6300.
SAVE THESE INSTRUCTIONS!
These instructions are intended to
familiarize all personnel with the safe operation
and maintenance procedures for the JM-2900.
Serious injury or death may occur
from inhaling engine exhaust or dangerous vapors. Use this product only
in a well ventilated area. This water jet
is designed for outdoor use only. Always
make sure there is adequate ventilation
(fresh outside air) for breathing and combustion.
Do not operate power tools in explosive atmospheres, such as in the
presence of flammable liquids, gases,
or dust. Power tools create sparks which
may ignite the dust of fumes.
Do not spray flammable liquids. Risk
of explosion. Flammable liquids can create fumes which can ignite causing property damage or severe injury.
SAFETY SYMBOLS
This is the safety alert symbol. It is used
to alert you to potential personal injury
DANGER indicates a hazard with a high level of risk which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazard with a medium level of risk which, if
not avoided, could result in death or serious injury.
hazards. Obey all safety messages that
follow this symbol to avoid possible
injury or death.
Do not direct discharge stream at people. This equipment can produce a high
pressure stream of fluid that can pierce
skin and its underlying tissues, leading to
serious injury and possible amputation or
death.
Always wear safety glasses and rubber soled, non-slip shoes. High pres-
sure spray can cause paint chips or
other particles to become airborne
and fly at high speeds. Use of this
safety equipment may prevent serious
injury.
WARNING
This product contains lead, a chemical known to the State of
California to cause birth defects or other reproductive harm.
Wash your hands after handling this product.
CAUTION indicates a hazard with a low level of risk which, if not
avoided, will result in minor or moderate injury.
WARNING
This product contains one or more chemicals known to the State
of California to cause cancer and birth defects or other reproductive harm.
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Jet-Set JM-2900™
GENERAL SAFETY RULES
WARNING
Read and understand all instructions. Failure to follow all instructions listed below may result in electric shock, fire, and/or
serious injury.
SAVE THESE INSTRUCTIONS!
WORK AREA SAFETY
1. All installations must comply with local codes. Contact your
plumber, utility company or the selling distributor for specific details.
2. Risk of explosion. Do not spray flammable liquids or operate
in an area where flammable or explosive materials are used
or stored. Power tools create sparks which may ignite dust and
fumes.
3. Keep bystanders, children, and visitors away while operating
machine. Distractions can cause you to lose control.
PERSONAL SAFETY
1. High pressure developed by jet machines will cause personal
injury. Water spray should not be pointed at any person. High
pressure spray can result in serious injury. If fluid seems to have
penetrated the skin, seek emergency medical attention at once.
2. Grip jet hose or spray wand securely with both hands before
starting the machine. Failure to do so could result in injury from a
whipping hose or wand.
3. Always wear eye protection and rubber gloves. Safety equipment, eye safety devices, non-skid safety shoes and protective
clothing must be worn when using this equipment.
4. Do not touch engine during operation. The muffler and other
parts of the engine get hot and can cause severe burns.
5. Do not smoke while filling engine fuel tank. Fumes can ignite
causing property damage and severe injury.
6. Stay alert, watch what you are doing and use common sense
when operating a power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or medication. A mo-
ment of inattention while operating power tools may result in serious personal injury.
7. Dress properly. Do not wear loose clothing or jewelry. Con-
tain long hair. Keep your hair, clothing, and gloves away from
moving parts. Loose clothes, jewelry, or long hair can be caught
in moving parts.
SERVICE
1. Tool service must only be performed by qualified service
personnel. Service or maintenance performed by untrained per-
sonnel could result in injury and damage to the equipment.
2. When servicing tool, use only identical replacement parts.
Follow instructions in maintenance section of this manual.
Use of unauthorized parts or failure to follow maintenance instructions may cause injury or damage to equipment.
JET SAFETY
1. Do not operate jet above rated pressure or above 140 degrees
(rated water temperature). Operating jet above rate specifica-
tions risks damage to the pump and related components, and will
void the warranty.
2. Do not operate jet with the output valve in the off position for
extensive periods of time. This will cause the water to overheat
and damage the pump.
3. Never run pump without water in it. Operating the machine
without water will cause the pump to fail and void the warranty.
4. Check for worn hose and components before each use.
Check that all fittings are secured before using jet. Worn or
lose fittings can cause damage to the machine and injure the operator.
5. Protect machine and pump from freezing. Storing or operating
the jet in temperatures below freezing can damage pump, hose
and other jet components. Store unit indoors or protect with antifreeze when not in use.
6. General Wire Spring Co. will not be liable for any changes
made to our standard machines or any components not purchased from General Wire Spring Co.
JM-2900 SPECIFICATIONS
200 ft. Capacity Hose Reel
Pressure
Gauge
Pump
Pulse Valve Inlet Filter Output Valve
Tool Box
Engine
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Jet-Set JM-2900™
JET HOSE
1. When selecting hose size, consider that pressure is lost as the
water travels down the length of the hose. As the length increases,
the pressure decreases. In addition, the smaller the diameter of
the hose, the greater the loss of pressure per foot will be. As an
example, at 4 GPM, a 3/8” hose will lose 90 lbs. of pressure over a
100 ft. length. The gauge reflects pressure from the pump only,
not pressure at the end of the hose. It is important to select the
largest possible hose size in order to have as much pressure as
possible at the end of the hose.
2. Hoses of the same diameter may be coupled together using the
CC-1 coupling, but it is not recommended for use in lines smaller
than 8” in diameter. The long length of the hose connectors and
coupling together can get caught in bends in the line. It is not advisable to have two different hose sizes coupled in a drain line.
There is a tremendous loss of pressure when combined, aside
from the difficulty of getting around bends.
HOSE SELECTION GUIDE
Hose Size
(ID*)
3/8” 4” - 8” Floor drains, septic
1/4” 2” - 4” Kitchen sinks, laundry
Pipe Size Typical Applications Available Hose
Lengths
100 ft., 200 ft.
lines, long runs
100 ft., 150 ft.,
drains, clean outs
200 ft.
4. Use the nozzle selection guide to determine what nozzle you will
need for various applications. Examples: If a nozzle is stamped
#52, it is a JN-52, drilled for 4 GPM @ 3000 PSI with several 15°
rear jets and one forward cutting jet.
Powerful penetrating nozzle cuts
through grease and ice.
Wide spray flushing nozzle cleans
inside of pipe thoroughly.
SPECIALTY NOZZLES
Spring leader nozzles and down head
nozzles are special nozzles to help
hose travel through the pipe when
there are a lot of Tee’s, curves, and
bends.
1/8” 1-1/2” - 2” Small lines, bathroom
sinks, tight bends
* Inside Diameter
30 ft., 50 ft., 75 ft.
JET NOZZLES
1. A variety of jet nozzles are available for drain cleaning. Each has a
different spray pattern and purpose. Some nozzles may have an
orifice in the front to cut through the stoppage. All will have holes
in the back to drive the hose down the line and clean the walls of
the pipe. A tight spray pattern (15°) has more driving power for
long runs, a wide spray pattern (40°) does a better job of cutting
the grease off of the walls of the pipe. A combination of nozzles
may be required to clear a line. Always turn off the machine and
turn off output valve before changing nozzles.
2. Make sure the nozzle you are using matches the pump size. A
3000 psi pump requires a different nozzle orifice than a 1500 psi
pump. Mismatching nozzles with pump size will either cause too
little pressure, which may not clear the drain, or too much pressure, which may damage the machine.
3. Check nozzles before and after each use for clogged holes which
can cause pressure to increase to dangerously high levels and
damage the pump. A clogged hole can be cleared by simply using
the NCT Nozzle Cleaning Tool.
ROTARY NOZZLES
Rotary nozzles are useful as a finishing
tool. After the line has been cleared,
you may switch to the rotary nozzle to
more thoroughly clean the walls of the
pipe. Use these nozzles only in a predominantly straight run since they are
longer than regular nozzles and may
get caught in tight bends.
CHAIN SAW NOZZLES
Chain saw nozzles spin at up to 10,000 rpm to
rip through roots. Lengths of chain can be
quickly and easily switched for different diameter pipes.
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Jet-Set JM-2900™
NOZZLE SELECTION GUIDE
HOSE SIZE 1/8” 1/4” 3/8”
CAT # CAT # CAT #
15° Rear Jets w/No Forward Jet JN-31 JN-41 JN-51
15° Rear Jets w/One Forward Jet JN-32 JN-42 JN-52
30° Rear Jets w/No Forward Jet JN-33 - -
40° Rear Jets w/No Forward Jet - JN-44 JN-54
Spring Leader JNSL-4 JNSL-5 JNSL-6
Rotary Nozzle (Optional) - JNRB-4 JNRB-6
Chain Saw Nozzle (Optional) - - JCSN-6
JET ASSEMBLY
Upon arrival, inspect the shipping crate for damages. Uncrate and
examine all parts. Note any damage to machine or components
for claims against freight carrier.
Jet must be stored and operated in horizontal position. Never
store in upright position or oil may leak from pump. If low, fill with
SAE 30 weight non-detergent oil.
Gas jets are shipped with oil in the engine. Consult motor manu-
facturer’s guide for oil requirements.
Jet machines are meant to be used at or near the working area
and under operator supervision. If machine must be located out of
sight of operator, special controls may be required for proper machine operation and operator safety
6. Connect one end of a water supply hose (not included) to the
water supply and the other end to the water inlet of the jet machine. Water supply must be a minimum of 20 psi and not to
exceed 100 psi. Caution: Water temperature must not exceed
140 degrees or damage to the pump can occur. Use only heavy
duty 3/4” hose of no more than 50 ft. in length. If run without an
adequate water supply, the pump will cavitate. Cavitation causes
the pump to vibrate, causing damage to the pump. Note: Lack of
water supply can lead to seal damage, causing a loss of pressure and will void the warranty to the pump.
7. Maximum temperature from the water source should not exceed
140°F (60°C). Using water hotter than 140°F (60°C) can cause
damage to the pump and void the warranty. If jet is being used to
clear ice blockages, see instructions on Ice Blockages.
8. Select the proper hose diameter for the line to be cleaned. When
using new hose, run water through it to clean it out before attaching the nozzle.
OPERATION
NEVER POINT THE END OF THE JET HOSE AT A
PERSON WHILE OPERATING.
1. Select the correct jet hose size to match the line size you are
clearing. (See Hose Section Guide) Check all hoses for wear and
damage. Tighten all connections securely.
2. Select the correct nozzle and attach to the end of the hose. (See
Nozzle Selection Guide) Note: If you are using a new jet hose, run
water through it to flush out debris before connecting a nozzle.
3. Insert the jet hose 2 to 3 feet into the drain line before turning on
machine.
4. Turn on the water supply valve fully to allow for maximum flow.
5. Turn on the jet output valve and allow water to run through the
supply hose, jet, and jet hose to purge air from system before
turning on the machine.
6. Make sure that the output valve is turned on and the water is flow-
ing.
7. Start the engine using the Engine Start-up procedures listed be-
low.
OPERATION
SET-UP
1. Locate the jet near the drain line on a level surface with drainage.
Tip: Ideally, the drain line should be cleared from the downstream
side, that is, from the street back toward the house. If you must
clear the line from the drain toward the street, you may need to
use a siphon pump to clear away excess water.
2. Check the oil level in the pump. If low, fill with SAE 30 weight nondetergent oil.
3. Check the oil level in the engine. If low, fill with the oil weight recommended in the motor manufacturer’s manual.
4. Check the inlet filter to make sure it’s clean before each use. To
clean, unscrew filter cap, remove the screen and rinse thoroughly
with water. Then, replace screen.
5. Check that incoming water supply is clean and free of debris.
Turn the water source on for at least 15 seconds to remove any
possible debris in the water before connecting hose to water inlet.
GAS ENGINE START-UP
1. Make sure that the ball valve is turned on and water is flowing.
2. Move choke lever to the closed position. Note: Do not use choke
if engine is warm or ambient air temperature is high.
3. Move throttle lever to the midpoint position.
4. Turn the engine switch to the ON position.
5. Pull the starter grip lightly until resistance is felt, then pull briskly.
6. As the engine warms up, gradually move the choke lever to the
open position.
7. Position the throttle to the desired engine speed.
OPERATION CONTINUED
9. Guide the jet hose into the drain line. Do not feed the hose continuously, but rather, move the hose forward and back to allow the
pressure to break up the stoppage and the water flow to flush it
away. If you are clearing the line from the upstream side, this may
take more time. Clearing the line from the downstream side allows
debris to flow away easily.
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