22L NG/LPG DP – 45 HI _ 4″ HORIZONTAL VENT KIT

22L NG/LPG DP – 45 HI _ 4″ HORIZONTAL VENT KIT
According to ANSI code, gas tankless water heaters normally require stainless steel, category II/III vent pipe. This is due to the fact that gas tankless water heaters actually burn at a higher BTU rating. As such, the gas is extremely hot when it leaves the water heater, but cools quickly. This cooling process results in condensation which could eat through regular galvanized pipe.

We carry the Z-Flex vent pipe.
For tankless water heaters, it is single walled for model units like the 22L NG DP – 45 HI.

Stainless Steel Z-Vent Wall Hung Water Heater Vent Kit For 22L NG DP – 45HI.
4″ Horizontal Z-Vent Water Heater Vent Kit with Backflow.
Made of AL-294C stainless steel, this full vent kit is comes with all the necessary components for a quick and seamless installation.


It includes the following pieces :
(1) ___ Termination Hoodwith Backflow Preventer
(1) ___ 4″ x 90 Degree Elbow
(1) ___ 4″ x 1′ Pipe
(1) ___ 4″ x 1.5′ Pipe
(1) ___ 4″ Wall Thimble
(1) ___ 4″ Appliance Adapter

HORIZONTAL Termination INSTALLATION Requirements
We always recommend a horizontal installation when it is possible.
It requires less pipe and as such, less expensive.
When doing a horizontal run, your maximum lengths are as follows:
►1 Elbow: 47′ 6″

►2 Elbows: 42′ 6″

►3 Elbows: 37′ 6″

Each Elbow is equivalent to 5′ of Straight Pipe.