Z-Vent Gas Venting Products by Z-Flex

Z-flex brand stainless steel venting pipe, fittings and parts - approved for for installation with Category III (standard efficiency/non-condensing, power-vented) and Category IV (high efficiency/condensing, power-vented) gas fired appliances.
Recommended for Takagi and other brand tankless & storage-type water heaters, as well as wall-hung and floor-standing boilers.
Made in the USA from AL29-4C steel and meets UL 1738 standard.
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Z-Vent Concentric Vent Kit w/ 3" Fresh Air Intake and 4" Exhaust Z-Flex
Z-Vent Concentric Vent Kit w/ 3" Fresh Air Intake and 4" Exhaust
Part#: 2SVSHTC43S Brand: Z-Flex
In Stock
(2)
$205.95 / each
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Z-Vent Concentric Vent Kit w/ 3" Fresh Air Intake and 3" Exhaust Z-Flex
Z-Vent Concentric Vent Kit w/ 3" Fresh Air Intake and 3" Exhaust
Part#: 2SVSHTC03S Brand: Z-Flex
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$205.95 / each
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Z-Vent Concentric Vent Kit w/ 4" Fresh Air Intake and 4" Exhaust Z-Flex
Z-Vent Concentric Vent Kit w/ 4" Fresh Air Intake and 4" Exhaust
Part#: 2SVSHTC04S Brand: Z-Flex
In Stock
$205.95 / each
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4" Z-Vent Horizontal Vent Kit w/ Backflow Preventer Z-Flex
4" Z-Vent Horizontal Vent Kit w/ Backflow Preventer
Part#: 2ZVWB04 Brand: Z-Flex
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(2)
$245.95 / each
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4" x 1ft Z-Vent Single Wall Pipe Z-Flex
4" x 1ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0401 Brand: Z-Flex
In Stock
$27.95 / each
$155.70 box of 6 + Free Shipping
($25.95 each)
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4" Adjustable Z-Vent Single Wall Pipe (4"-12" Length) Z-Flex
4" Adjustable Z-Vent Single Wall Pipe (4"-12" Length)
Part#: 2SVSALS4 Brand: Z-Flex
In Stock
(1)
$49.95 / each
$281.70 box of 6 + Free Shipping
($46.95 each)
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4" x 2ft Z-Vent Single Wall Pipe Z-Flex
4" x 2ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0402 Brand: Z-Flex
In Stock
$45.95 / each
$256.50 box of 6 + Free Shipping
($42.75 each)
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4" x 2ft Nova-Vent Single Wall Pipe Z-Flex
4" x 2ft Nova-Vent Single Wall Pipe
Part#: 2NVP42 Brand: Z-Flex
In Stock
(1)
$38.95 / each
$215.10 box of 6 + Free Shipping
($35.85 each)
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4" x 3ft Z-Vent Single Wall Pipe Z-Flex
4" x 3ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0403 Brand: Z-Flex
In Stock
$59.95 / each
$335.70 box of 6 + Free Shipping
($55.95 each)
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4" x 3ft Nova-Vent Single Wall Pipe Z-Flex
4" x 3ft Nova-Vent Single Wall Pipe
Part#: 2NVP43 Brand: Z-Flex
In Stock
$50.95 / each
$281.10 box of 6 + Free Shipping
($46.85 each)
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4" x 4ft Z-Vent Single Wall Pipe Z-Flex
4" x 4ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0404 Brand: Z-Flex
In Stock
$83.95 / each
$467.70 box of 6 + Free Shipping
($77.95 each)
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4" x 4ft Nova-Vent Single Wall Pipe Z-Flex
4" x 4ft Nova-Vent Single Wall Pipe
Part#: 2NVP44 Brand: Z-Flex
In Stock
$73.95 / each
$407.70 box of 6 + Free Shipping
($67.95 each)
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4" x 5ft Z-Vent Single Wall Pipe Z-Flex
4" x 5ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0405 Brand: Z-Flex
In Stock
$104.95 / each
$587.70 box of 6
($97.95 each)
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3" x 1ft Z-Vent Single Wall Pipe Z-Flex
3" x 1ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0301 Brand: Z-Flex
In Stock
$21.95 / each
$122.70 box of 6 + Free Shipping
($20.45 each)
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3" Adjustable Z-Vent Single Wall Pipe (4"-12" Length) Z-Flex
3" Adjustable Z-Vent Single Wall Pipe (4"-12" Length)
Part#: 2SVSALS3 Brand: Z-Flex
In Stock
$49.95 / each
$278.70 box of 6 + Free Shipping
($46.45 each)
Add to Cart
3" x 2ft Z-Vent Single Wall Pipe Z-Flex
3" x 2ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0302 Brand: Z-Flex
In Stock
$41.95 / each
$233.70 box of 6 + Free Shipping
($38.95 each)
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3" x 3ft Z-Vent Single Wall Pipe Z-Flex
3" x 3ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0303 Brand: Z-Flex
In Stock
$54.95 / each
$305.70 box of 6 + Free Shipping
($50.95 each)
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3" x 4ft Z-Vent Single Wall Pipe Z-Flex
3" x 4ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0304 Brand: Z-Flex
In Stock
$71.95 / each
$401.70 box of 6 + Free Shipping
($66.95 each)
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3" x 5ft Z-Vent Single Wall Pipe Z-Flex
3" x 5ft Z-Vent Single Wall Pipe
Part#: 2SVEPWCF0305 Brand: Z-Flex
In Stock
$98.95 / each
$551.70 box of 6 + Free Shipping
($91.95 each)
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4" Z-Vent 90-Degree Elbow, Single Wall Z-Flex
4" Z-Vent 90-Degree Elbow, Single Wall
Part#: 2SVEEWCF0490 Brand: Z-Flex
In Stock
(1)
$62.95 / each
$353.70 box of 6 + Free Shipping
($58.95 each)
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4" Nova-Vent 90-Degree Elbow, Single Wall Z-Flex
4" Nova-Vent 90-Degree Elbow, Single Wall
Part#: 2NVE490 Brand: Z-Flex
In Stock
(1)
$52.95 / each
$287.70 box of 6 + Free Shipping
($47.95 each)
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Frequently Asked Questions

Q: Which Vent Category does Z-Vent cover?
A: Z-Vent is designed specifically for Category III and IV vented appliances.
Z-Vent is code-specified for all Category III water heaters, boilers, unit heaters & furnaces which are power-vented (fan-assisted flue exhaust) and are non-condensing (standard efficiency type). These include many gas tankless water heaters, power vent storage type water heaters and power vent cast iron boilers.
Z-Vent is also a good choice for Category IV appliances, which are power-vented and are high-efficiency (produce condensate during normal operation), however, due to high cost, in Cat. IV venting applications, poly vent pipe (such as Innoflue by Centrotherm) is often used instead due to a significantly lower cost.
Category I & II venting - while technically compatible with these appliances, Z-Vent is rarely used due to high costs, as much lower priced alternatives are available.

Q: What is the maximum allowed operating temperature for Z-Vent?
A: It is 480°F (249°C)

Q: What size nut driver is needed for the hex nut on Z-Vent gear clamp?
A: 5/16"

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