ECR UTICA BOILERS SVB II Series, Installation, Operation & Maintenance Manual

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C.  For Flex-L StaR-34 stainless steel vent pipe use 

a high temperature silicone sealant rated for 

550°F. Before applying silicone, the outside of 

the male end and inside of the female end of the 

pipe must be cleaned using a cleaner, such as 

methyl ethyl ketone (MEK) or naphtha. For 3” 

vent pipe runs, begin with the male end of the 

vent pipe over the boiler’s induced draft blower 

outlet. For 4” vent pipe runs begin with a StaR-34 

3” to 4” increaser 

fi

 tting over the boiler’s induced 

draft blower outlet. For both 3” and 4” vent pipe 

runs, apply a bead of silicone sealant around the 

blower outlet and around the  inside of the male 

end of vent pipe going over the blower’s outlet.                                                                                            

When using the Tjernlund VH-1 vent hood, 

the female end (

fl

 ared end) of the vent pipe 

will be connected to the termination hood.                                                                             

Apply high temperature silicone in an even ¼” 

bead approximately ¼” from the end of the vent 

hood’s connecting vent pipe. Also, run a similar size 

bead of silicone sealant down the seam weld of the 

vent pipe. Then push the female end over the vent 

hood’s connecting vent pipe. Now 

fi

 ll in the channel 

inlet with silicone sealant. Do not try to insert the 

joiner band, instead fasten the vent pipe to the 

vent hood’s pipe with a steel gear clamp.
1.  Apply the high temperature silicone around 

the male end of the pipe in an even ¼” bead. 

Silicone bead should be approximately ¼” from 

the end of the male end. Also, run a similar size 

bead of silicone sealant down the seam weld at 

the end of each joint.

2.  The seams on the vent pipe should be aligned 

and oriented upward in all horizontal vent pipe 

runs.

3.  Insert the male end of one into the female end 

of the other. Push the pipe together so the 

female end rests up against the stop bead of the 

male end.

4.  Insert a StaR-Joiner Band into the inlet of the 

beaded channel. Feed the Joiner Band in so 

it makes its way around the pipe, back to the 

channel inlet and it overlaps itself by about ½”.

5.  Cut the excess Joiner Band so it lays 

fl

 at in the 

beaded channel. Fill the inlet of the beaded 

channel with high temperature silicone. Smooth 

out the silicone over the channel inlet and the 

silicone between the female end and the stop 

bead of the male end.

6.  Horizontal venting shall have a slope not less 

than ¼” every 12 inches (21mm/m) downward 

away from the boiler to prevent collection of 

condensate throughout the assembly.

7.  Allow the sealant to cure for 24 hours before 

operating the appliance.

D.  For ProTech Systems FasNSeal stainless steel 

vent pipe no cleaning 

fl

 uid is required. For 3” 

vent pipe runs on 2, 3, 4 and 5 section boilers, 

begin by locating the FasNSeal Ametek Adapter 

over the boiler’s induced draft blower. Continue 

the vent pipe run with 3” FasNSeal vent pipe.                                                                                           

For 6 and 7 section boilers, begin by locating the 

FasNSeal Ametek Adapter over the boiler’s induced 

draft blower. Then connect a FasNSeal 3” to 4” 

increaser to the 3” adapter outlet. Continue the 

vent pipe run with 4” FasNSeal vent pipe. Other 

than the Ametek Adapter and increaser 

fi

 tting, DO 

NOT use 3” vent pipe on 6 or 7 section boilers. 

FasNSeal vent pipe is joined and sealed by the 

use of an internal sealing gasket and a locking 

band on the female end of each vent pipe. All 

components should be examined for possible 

shipping damage prior to installation. Align all vent 

pipe seams and orient upward in all horizontal 

applications. Adjustable vent lengths are available 

for 4” diameter vent piping. For 3” diameter vent 

piping, square cut male end at the desired length. 

For 2, 3, 4 and 5 section boilers using the VH-1-

3” vent hood, connect the FasNSeal Vent to the 

VH-1-3” vent hood using FasNSeal Adapter #FSC-

DUN-3. This adapter has no internal sealing gasket.                                                                      

To attach the adapter to the vent hood, crimp 

the 3” vent hood pipe, apply a ¼” bead of high 

temperature silicone sealant around the outside 

of the vent hood’s crimped connecting pipe and a 

similar bead of high temperature silicone around 

the inside of the FasNSeal adapter. After pressing 

the two pipes together and tightening the locking 

band, 

fi

 nish creating a complete seal by 

fi

 lling 

the FasNSeal adapter’s notched hole with high 

temperature silicone.      For  6 and 7 section 

boilers using the VH-1 - 4” vent hood, an adapter 

is not required. The 4” FasNSeal vent pipe connects 

directly to the VH-1- 4” vent hood, and is joined 

and sealed by the internal gasket and locking band.

To join and seal the FasNSeal vent pipe:

1.  Insert male end into female section.
2.  Push the units together as far as possible.
3.  Firmly tighten locking band with a nut driver.
4.  DO NOT penetrate the FasNSeal vent pipe with 

fasteners.

5.  Horizontal venting shall have a slope of not less 

than ¼” every 12 inches 21mm/m) downward 

away from the boiler to prevent the collection of 

condensate throughout the assembly. 

HORIZONTAL VENTING INSTRUCTIONS