Install Instructions

2
REMOVE 1"
INSULATION
CUT MUST
BE CENTERED
IN CONVOLUTION
NUT ISOLATION
RING
SILICONE
RING
FITTING
4-5 CORRUGATIONS
1. Remove the nut and check that the  tting internal
components are in place (silicone ring and isolation ring).
2. Replace the loosened nut and internal components as shown in
the illustration to the right. Turn the nut clockwise two revolutions
on the threads. Before tightening the nut, insert the tubing
completely in the  tting to the tubing stop until it meets the
internal wall. If done correctly, the tubing should be approximately
one inch, or four to  ve corrugations inside the  tting.
3. Hold the  tting on the pipe and tighten the nut onto the  tting
using the appropriate torque as shown in the table below.
Tube Size (Inch) 3/4" 1" 1 1/4"
Torque Value (Ft./lb) ≈44–48 ≈72–76 ≈120–140
Specifi cations & Preparing for Installation
(not applicable to all kits)
To Cut Tubing (If Desired)
IMPORTANT!
Tighten End Connections
The amount of Hydro-Core Flex Piping provided is suitable for wide range of boilers.
However, tubing may be cut to suit the needs of your speci c installation if so
desired. Retaining excess length will not effect the performance of the system.
1. Remove end connections.
2. Measure the desired pipe length and mark this point on the insulation.
3. Remove the insulation beyond this mark – DO NOT CUT THE TUBING.
4. Measure one inch of exposed pipe above the insulation. This is the cut point.
5. Using a metal tube cutter, cut the tube at the cut point.
Cut MUST be centered in a valley between corrugations.
6. Insert tube into the  tting, then tighten end connections.
Warning:
• To avoid crimping the pipe, DO NOT use excess force.
• Cut must be a clean cut. A rough cut with irregular edges can perforate the silicone ring and cause leakage.
• Caution should be used when handling the  ex piping with the end  ttings removed due to potential for injury on a sharp edge.
• Included in select Complete
Near Boiler Piping Kits
• Flexible Supply/Return
lines designed to
accommodate a wide variety
of boiler installations
• Tubing may be cut for
installations in close quarters
PATENTS PENDING
Flex Pipe Conforms
to NSF/ANSI 61,
ASTM A 312/312M,
IAMPO, IGC-233
3/4" 1" 1 1/4"
Inner Diameter 0.83" 1.03" 1.26
Max Operating Temperature 212° 212° 212°
Max Cold Working Pressure 176 PSI 147 PSI 110 PSI