Z-Flex 3" Termination Options for Bosch 2700ES/2400ES Tankless Water Heaters

We stock the full line of Z-Flex Z-Vent 3" and 4" stainless steel vent pipe. There are a variety of termination options for both the 3" and 4" venting.

All of our termination pieces come with a built-in bird screen to ensure that birds and other critters cannot get into your venting system.

The AQ3ES Side Wall Vent Kit for the Bosch 2700ES and 2400ES tankless water heaters comes with the 3" Termination Box with a 10" sleeve (2SVSTB03). This special OEM part is exactly the same as the Z-Flex part 2SVSRTF03. The 2SVSTB03 and the 2SVSRTF03 can both also be used for intake air.

If you have vinyl siding then you do not want to use the 2SVSTB03 or 2SVSRTF03 Termination Box as the hot exhaust gases may melt your vinyl siding. The recommended part for vinyl siding is the 3" Termination Hood (2SVSHTX03). This part can also be used for intake air.

We also sell the 3" Termination Hood with Damper (2SVSHTD03), but this part is not approved for either the Bosch 2700ES or Bosch 2400ES tankless heaters. The concern is that if the damper gets frozen shut then the exhaust gases cannot escape. The 3" Termination Hood with Damper cannot ever be used for intake air!

We carry the 3" Termination Coupling (2SVSTPF03). This will exhaust the gases straight out from your house, so safety is a concern when using this part for exhaust. This part can be used for either exhaust or intake.

The 3" Termination Tee (2SVSTTF03) exhausts the gases out in two directions. This part can also be used for intake air.

The 3" Termination Elbow (2SVSTEX0390) will shoot the exhaust gases out in a single direction. This part can also be used for intake air.

The Z-Flex Z-Vent 4" stainless steel vent pipe part numbers are as follows:

• 4" Termination Box 2SVSRTF04
• 4" Termination Hood 2SVSHTX04
• 4" Termination Hood with Damper 2SVSHTD04
• 4" Termination Coupling 2SVSTPF04
• 4" Termination Tee 2SVSTTF04
• 4" Termination Elbow 2SVSTEX0490

Steve