Frequently Asked Questions
HOW CAN I OBTAIN FRICTION LOSS DATA?
Friction loss data is included in our Sidewinder™
Data Sheets. See our Technical Data Sheet for FM models.
WHAT MATERIALS ARE USED IN THE FABRICATION
GATEWAY'S SIDEWINDER™ DROPS?
Tube and braided outer covering: AISI 304
Tube: AISI 304 stainless steel
Nut which connects to nipple: SS41 stainless steel with zinc
Square bar: SS41 stainless steel with zinc plating
Ceiling grid clamps and reducer clamp: SS41 stainless steel
with zinc plating
Nipple: SPP carbon steel with zinc plating
Yellow plastic isolation ring: Nylon 66
O-ring: NBR (nitrile butadiene rubber), which is a high
quality nitrile elastomer commonly used in demanding applications such
as aircraft carburetor gaskets and fuel pump O-rings.
WHAT HOLDS THE REDUCER TO THE FLEXIBLE TUBE?
The reducer is brazed to the flexible tube. Brazing is
of joining metal to metal by filling the joint with a different, melted
metal at temperatures over 840°F. The melted metal is drawn into
the joint between the reducer and the flexible tube by capillary
action. The brazing process assures a leakproof, corrosion-proof
connection between the reducer and tubing.
WHAT IS THE PURPOSE OF THE YELLOW PLASTIC
THE NUT AND FLEXIBLE TUBE?
The plastic prevents the zinc plated stainless steel nut
contacting the 316L stainless steel flexible tubing, preventing
WHAT IS ANNEALING?
After the flexible tubing is corrugated, it is annealed,
that the corrugated tubing is slowly passed through a high temperature
furnace, eliminating residual stresses in the steel resulting from the
corrugation process. The annealing process toughens the steel and
allows it to withstand the repetitive fatigue tests mandated for
WHERE CAN I BUY SIDEWINDER™ SPRINKLER DROPS?
Gateway Tubing distributes its premier sprinkler drops
trusted distributors throughout the United States and Canada. Contact Gateway Tubing or one of our
distributors for current pricing and availability.
WHAT KIND OF TESTING HAS THE PRODUCT
Sidewinder™ drops for FM have passed all tests mandated by FM Standard
here for more details.
CAN I USE SIDEWINDER™ DROPS IN RECESSED HEAD
Our standard mounting assembly allows the installation
CAN I USE SIDEWINDER™ DROPS IN A DRY PIPE
Yes. Gateway’s Sidewinder™ drops are listed for use in
wet and dry fire sprinkler systems.