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d) With a twisting motion, assemble the reducing tee adapter onto the boiler vent collar.
e) Push the adapter onto the vent collar, using care to avoid damaging the appliance collar or the
adapter (Figure 8b).
f) Keep the sampling port in the 12 o’clock position and align the prepunched slots in the
reducing tee adapter to the threaded holes on the vent collar.
g) Secure the reducing tee adapter to the vent collar with (3) 1/4-20 x 1/2” stainless steel cap screws
inserted into the three tapped holes in the vent collar and tighten. (Figure 8b).
h) Apply red silicone sealant to the end of the adapter and anchoring screws. (Figure 8b).
i) After testing and burner adjustments have been made, apply red silicone sealant to the
supplied 3/8” sampling port plug screw and install the screw in the sampling port (Figure 8b).
j) Maintain clearances to combustibles. If the reducing tee adapter is within 18” of combustible
material, wrap minimum 1-1/2” ceramic insulation (installer-supplied) around the exposed
portion of the reducing tee adapter.