Vermont Castings DBT33, Installation Instructions & Homeowner'S Manual

DBT33/DBT36/DBT39 

-14- 

10002789/0

STEP 6

Use appropriate length of pipe sections - telescopic or xed - 

and install the horizontal vent sections.  The sections which go 

through the wall are packaged with the starter kit, and can be 

cut to suit if necessary. (Fig. 26).

Sealing vent pipe and restop gaps with high temperature 

sealant will restrict cold air being drawn in around replace.

STEP 7

Apply high temperature sealant to 4" (100 mm) and 7" (175 

mm) collars or the termination one inch away from crimped 

end. Guide the vent terminations 4" and 7" collars into their 

respective vent pipes.  Double check that the vent pipes over-

lap the collars by 2" (50 mm).  Secure the termination to the 

wall with screws provided and caulk around the wall plate 

to weatherproof, Fig. 27.  As an alternative to screwing the 

termination directly to the wall you may also use expanding 

plugs or an approved exterior construction adhesive.  You may 

also attach the termination with screws through the inner body 

into the 4" vent pipe however for this method you must extend 

the 4" pipe approximately 6" (150 mm) beyond the outer face 

of the wall.

Support horizontal pipes every 3' (91 cm) with 

metal pipe straps.

Check replace to make sure it is levelled and 

properly positioned.

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NSTALLATIONS

When it is not possible to meet the required vent terminal 

clearances of 12" (305mm) above grade level a snorkel vent 

kit is recommended.  It allows installation depth of down to 

7 " (178mm) below grade level.  The 7" is measured from 

the centre of the horizontal vent pipe as it penetrates through 

the wall.

If venting system is installed below ground, we recommend a 

window well with adequate and proper drainage.

Ensure sidewall venting clearances are observed.

If installing a snorkel a minimum 24" vertical rise is necessary.  

The maximum horizontal run with the 24" vertical pipe is 36" 

(915mm).  This measurement is taken from the collar of the 

replace (or transition elbow) to the face of the exterior wall.  

See the Sidewall Vent Graph for extended horizontal run if the 

vertical rise exceeds 24".
1.  Establish vent hole through the wall (Fig. 22.
2.  Remove soil to a depth of approximately 16" below base 

of snorkel.  Install drain pipe.  Install window well (not 

supplied).  Rell hole with 12" of coarse gravel leaving a 

clearance of approximately 4" below snorkel. (Fig. 28)

3.  Install vent system.
4.  Ensure a watertight seal is made around the vent pipe 

coming through the wall.

5.  Apply high temperature sealant caulking (supplied) 

around the 4" and 7" snorkel collars.

6.  Slide the snorkel into the vent pipes and secure to the 

wall.

7.  Level the soil so as to maintain a 4" clearance below 

snorkel. (Fig. 28)

Fig. 26

Fig. 27