Rheem PH20R-(IFSN)(IFSP)(OFN)(OFP), PTG2-42(PVN)(PVP) Vent Horizontal Wall Thimble Installation

Installing the water heater:

Vent Horizontal Wall Thimble Installation

Inner Thimble	Outer Thimble
Section	Section

Side View

An approved 3 inch (7.6 cm) Vent Horizontal Wall Thimble must be used.

The Wall Thimble requires mechanical support from the wall sufficient to support any incidental loads on the system. If the wall is not sufficient enough to support the Wall Thimble, then appropriate additional framing and/or blocking is required.

sheathing is particle board or other composite material. Use four (4) #10x1-1/4” wood screws for plywood, solid wood sheathing or members. Use suitable masonry anchors when passing through solid masonry walls. Reinstall the decorative sheathing around the Wall Thimble. This assembly may be painted to match the exterior decor.

		Inner Wall
				Outer Thimble
	Inner Thimble				Section
	Section
90˚ Elbow
		Vent
		Pipe			90˚ termination
		Outer
		Wall			with screen
Appliance
Vent Adapter				Caulk for
			weather seal

Water

Heater

Outside Wall

Mounting

Brackets

Side View

Side View

WARNING: Use UL approved Category III vent material only. No other vent material is permitted.

INSTALLATION PROCEDURE: Prepare an opening for the Wall Thimble in the wall. The opening must be 6-1/2” (16 cm) in diameter for a 3” (7.6 cm) vent system.

If there are not sufficient support members to secure the Wall Thimble or if there is a semirigid foam insulation layer under the sheathing, appropriate fasteners must be used to secure the Wall Thimble to the support members.

The Wall Thimble is designed to adapt to any wall thickness from 3-1/2” (9 cm) to 6” (15 cm) thick. If the wall is thicker than 6” (15 cm), the Wall Thimble may be extended using a piece of 6” (15 cm) diameter snaplock or welded seam galvanized pipe up to 6” (15 cm) long.

Select the larger diameter half of the Wall Thimble for the outside of the wall.

●Apply a continuous bead of high quality silicone or silicone/latex caulk on the inside of the outer flange. This will be the only weather seal to keep moisture outside the building. Ensure a sufficient seal is made.

● Attach a Rheem approved 3” (7.6 cm)

screened, 90° elbow termination to the

female end of a vent section or slip

connector. Use the method described in the

Venting installation instructions provided

with the vent. Slide the vent in through the

outside of the Thimble and seal the annular

space with a thick bead of caulk.

● Slide the interior portion of the Thimble

into the inside hole. Be certain the interior

and exterior Thimble halves overlap at least

1” (2.5 cm). If insufficient overlap exists,

extend the interior portion with single wall

galvanized pipe.

● Secure the Wall Thimble to the interior

sheathing using suitable fasteners.

● Secure the vent section or slip connector

that protrudes through the Wall Thimble

to the rest of the vent system as described

in the Venting installation instructions

provided with the vent.

● Proper support must be provided for the

vent pipes as mentioned in the venting

section.

CAUTION: Follow the vent manufacturer’s installation instructions as design might vary from manufacturer to manufacturer.

●Position this portion of the Wall Thimble into the prepared hole from the outside. Secure the assembly into the prepared opening using fasteners as indicated by sheathing or structural members, sealing the screw heads with more caulking.

Use four (4) hollow wall anchors, at least 1/8” (.32 cm) in diameter and of appropriate length for the thickness of the sheathing, if

● Support method used should isolate the

vent pipe from floor joist or other structural

members to help prevent the transmission

of noise and vibration.

● Do not support, pin or otherwise secure the

venting system in a way that restricts the

normal thermal expansion and contraction

of the chosen venting material.

	1/4" per foot downward slope				1/4" per foot upward slope
				3" (8 cm)
3" (8 cm) Clearance
				Clearance
2'				2'					Support
(61 cm)				(61 cm)
			Support						Hanger
Max				Max
			Hanger				Condensate Trap
						Vent		To Drain. Dispose of
		Vent						condensate in accordance
						Adapter		with local codes
		Adapter

Example A: Typical Horizontal Termination	Example B: Typical Horizontal Termination
w/ 1/4” per foot DOWNWARD Slope	w/ 1/4” per foot UPWARD Slope

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