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B. Wall Penetration Framing/Firestops
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield firestop(s). The wall shield
firestop maintains minimum clearances and prevents cold
air infiltration.
• The opening must be framed on all four sides using the
same size framing materials as those used in the wall
construction.
• SLP pipe - A wall shield firestop must be placed on each
side of an interior wall. A minimum 1-1/2 in. (38 mm)
overlap of attached heat shields must be maintained.
• DVP pipe - A wall shield firestop is required on one side
only on interior walls. If your local inspector requires a
wall shield firestop on both sides, then both wall shield
firestops must have a heat shield (refer to Section 12.A.)
attached to them.
• See instructions included with PVLP-SLP and PVI-SLP-
B for clearance information.
• See Section 7.F. for information for regarding the instal-
lation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by non-com-
bustible materials such as concrete, a hole with diameter
one inch greater than the pipe is acceptable.
Whenever a non-combustible wall is penetrated, the wall
shield firestop is only required on one side and no heat
shield is necessary.
Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. Z • 3/19
26
26
26
DO NOT PACK WITH
INSULATION OR
OTHER MATERIAL
13 in.
10 in.
MODEL
PRIMO
PRIMOST
*
Shows minimum vertical vented PVLP-SLP: Factory-
installed DVP pipe, SLP90 elbow and included DVP-
2SL.
1-1/2 IN. CLEARANCE
(BACK)
ZERO CLEARANCE
(TOP)
ZERO CLEARANCE
(SIDES AND BOTTOM)
See PVLP-SLP installation instructions
for service access information.
Figure 5.4 Wall Penetration (PVLP-SLP)
*
A
13 in.
10 in.
PVLP-SLP
A
44-1/4 in.
1124 mm
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