| All indoor tankless gas water heaters must be vented vertically or horizontally to the outdoors using Category III stainless steel venting material (No other venting material is permitted). RTG-42PV indoor models require 3" stainless steel venting. RTG-74PV and GT-199PV indoor models require 4" stainless steel venting. Venting details, including clearances and diagrams, can be found in the "Use & Care Manual" of Rheem indoor tankless water heaters. NOTE: Rheem outdoor tankless water heaters do not require venting materials.
When choosing an indoor location, you should consider the shortest venting distance to the outdoors. Consult your professional installer or contact us for maximum venting distances.
Rheem offers all necessary venting materials, accessories and expertise to make your tankless water heater installation easy - including horizontal vent kits listed below.
Vent Kits for Horizontal Venting
Rheem horizontal vent kit (RTG20003) for RTG-42PV series indoor gas models includes:
- (1) Adapter
- (2) 90 degree elbows
- (1) 12" length vent pipe
- (1) Two-piece 6" - 19" adjustable length pipe
- (1) Two-piece horizontal wall thimble
- (1) 90 degree termination elbow with vent screen
- (1) Pressure relief valve
Venting diagrams shown are for illustrative purposes only.
Rheem horizontal vent kit (RTG20007) for RTG-74PV and GT-199PV series indoor gas models includes:
- (1) Adapter
- (2) 90 degree elbows
- (1) 12" length vent pipe
- (1) Two-piece 6" - 19" adjustable length pipe
- (1) Two-piece horizontal wall thimble
- (1) 90 degree termination elbow with vent screen
- (1) Pressure relief valve
- 18-AWG, 2-conductor thermostat wire for remote control
Rheem horizontal vent kit (RTG20066 ) for RTG-53DV series indoor gas models includes:
- (1) Adapter
- (1) 90 degree elbows
- (1) Horizontal termination
- (1) 12" length vent pipe
- (1) Pressure relief valve
- (1) 18-AWG, 2 conductor thermostat wire for remote control
Rheem Direct Vent Kits For the RTG-74 and GT-199 Direct Vent
All indoor tankless gas water heaters must be vented vertically or horizontally to the outdoors using Category III stainless steel venting material (No other venting material is permitted). RTG-42PV indoor models require 3" stainless steel venting. RTG-74PV and GT-199PV indoor models require 4" stainless steel venting. NOTE: Rheem outdoor tankless water heaters do not require venting materials. All Rheem tankless water heater venting material is made from Category III stainless steel for durability and safety. All components are UL 1738 certified. Manufactured using AL29-4C® advanced ferritic stainless steel with unmatched corrosion resistance for use with condensing furnaces and boilers. Utilizing a fail-safe gasket connection. No sealant is required. Rheem Tankless Water Heater
For Venting your Rheem Tankless Direct Vent, Rheem offers three Sweet Termination Direct VentKits For quick and Easy side wall vent Terminations:
RTG20058 5 to 9 Sweet Vent Term
RTG20059 9 to 13 Sweet Vent Term
RTG20060 13 to 17 Inch Sweet Vent Term
RTG20033VHT Rheem Vertical Concentric Vent Kit
1 36" Length - 4"/7" Concentric Pipe
1 Vertical Termination Adapter
1 Air Intake Tee-Heat Fab
8 Self Tapping Screws
1 Vertical Outlet Termination
RTG20066 3", Horizontal Vent Kit Features:
• (1) Adapter
• (1) 90 degree elbows
• (1) Horizontal termination
• (1) 12" length vent pipe
• (1) Pressure relief valve
• (1) 18-AWG, 2 conductor there
3" Tankless Vent Components
RTG20000BM Vent Adapter
RTG20001C 90 DegreeElbow
RTG20001J 45 Degree Elbow
RTG20001D 12" Length Vent Pipe
RTG20001K 24" Length Vent Pipe
RTG20001E " Length Vent Pipe
RTG20001F 2-piece 6"-19" Adjustable Length Pipe
RTG20001B 2-piece Horizontal Wall Thimble
RTG20001H 90 Degree Termination Elbow with vent screen
RTG20001A Horizontal/Vertical In-Line Condensate Trap
RTG20001G Screen Termination
RTG20001M Support Clamp
RTG20001L 2" Clearance Horizontal Support
RTG20001N Pitched Cone Vent Flashing for vertical termination
RTG20001 P Roof Jack Support System for vertical termination on flat roof
RTG20001R Storm Collar
RTG20001S Rain Cap w/ storm collar for vertical vent termination
RTG20001T 16" x 16" Fire Stop
RTG20001U Conduit Tee
RTG20001V Tee Cover with drain fitting
4" Tankless Vent Components
RTG20002B Vent Adapter
RTG20002E 90 Degree Elbow
RTG20002R 45 Degree Elbow
RTG20002C 12" Length Vent Pipe
RTG20002S 24" Length Vent Pipe
RTG20002D 37.5" Length Vent Pipe
RTG20002L 2-piece 6"-19" Adjustable Length Pipe
RTG20002N Round Face 2-piece Horizontal Wall Thimble
RTG20002F 90 Degree Termination Elbow with vent screen
RTG20002K Horizontal/Vertical In-Line Condensate Trap
RTG20002M Screen Termination
RTG20002U Support Clamp
RTG20002T 2" Clearance Horizontal Support
RTG20002V Pitched Cone Vent Flashing for vertical termination
RTG20002W Roof Jack Support System for vertical termination on flat roof
RTG20002X Storm Collar
RTG20002Y Rain Cap w/ storm collar for vertical vent termination
RTG20002Z 16" x 16" Fire Stop
RTG20002G Conduit Tee
RTG20002J Tee Cover with drain
3 by 5" Concentric Vent Components
RTG20049 Appliance Adapter
RTG20075A 90 Degree Elbow
RTG20075B 45 Degree Elbow
RTG20069 12" Vent Length
RTG20075C 24" Vent Length
RTG20075D 36" Vent Length
RTG20075E 12-19" Adjustable Length Pipe
RTG20075F Condensate Drain
RTG20050 Horizontal Termination
RTG20075G Support Clamp
RTG20075H Vertical Support Leg
RTG20075J Flat Roof Flashing
RTG20075K 6/12 Pitched Roof Flashing
RTG20075L 12/12 Pitched Roof Flashing
RTG20061 Vertical Termination
RTG20075M 5" Storm Collar
RTG20001S Rain Cap
RTG20068 12 x 12 Fire Stop
RTG20073 Condensate Drain Tube
Other Tankless Components
RTG20009 18 AWG Thermostat Wire for remote control connection
RTG20002A 10 ft. Condense Drain Tube Hose Kit
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