User Guide
Jet-Set JM-2900™
4
HOSE SELECTION GUIDE
Hose Size
(ID*)
Pipe Size Typical Applications Available Hose
Lengths
3/8” 4” - 8” Floor drains, septic
lines, long runs
100 ft., 200 ft.
1/4” 2” - 4” Kitchen sinks, laundry
drains, clean outs
100 ft., 150 ft.,
200 ft.
1/8” 1-1/2” - 2” Small lines, bathroom
sinks, tight bends
30 ft., 50 ft., 75 ft.
* Inside Diameter
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 ad-
visable 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.
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 pres-
sure, 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.
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.
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 pre-
dominantly straight run since they are
longer than regular nozzles and may
get caught in tight bends.
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.
Wide spray flushing nozzle cleans
inside of pipe thoroughly.
Powerful penetrating nozzle cuts
through grease and ice.
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 di-
ameter pipes.