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Tubos Vent Pipe Extension, 2 in., 3 in. and 4 in. Sizes, Cast Iron and PVC Compatible
Regular price $68.50Orders start at $399 — combine any items to reach the minimum. Learn more
Tubos Vent Pipe Extension, 2 in., 3 in. and 4 in. Sizes, Cast Iron and PVC Compatible
Tubos vent pipe extensions raise vent stacks back to code-required height above the roof when added insulation layers bury them too low. Available in 2, 3 and 4 in. sizes, they fit both cast iron and PVC vent pipes. Installation takes just three steps: measure, cut to length, and seal in place with caulk, a simple 3- to 5-minute project.
Key Features:
- Restores code height: Raises vent stacks to the height required by national and local building and plumbing codes.
- Three pipe sizes: Offered in 2, 3 and 4 in. sizes to accommodate the majority of vent pipes.
- Material compatible: Compatible with both cast iron and PVC vent pipes.
- Cut to length: Cut to the needed length on site for a custom fit.
- Quick install: A simple 3- to 5-minute measure, cut and seal installation.
- Meets code: When installed per instructions, the extension meets code height requirements.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Tubos |
| Sell unit | 1 piece |
| Product line | OMG Tubos vent pipe extension |
| Available sizes | 2 in., 3 in., 4 in. |
| Dimensions | 2 in., 3 in., or 4 in. pipe size; cut to length on site |
| Material | fits cast iron and PVC vent pipes |
| Assembly | Measure, cut to length, seal in place with caulk |
| Intended use | Extending vent stacks above roof insulation to meet code height |
| Compatibility | Cast iron and PVC vent pipes |
| Available colors | Not stated |
Coverage & How Much You Need:
Not applicable; each extension is one piece sized to the vent stack diameter and cut to the required height.
Fit and Compatibility:
Available in 2, 3 and 4 in. diameters, compatible with both cast iron and PVC vent pipes. Choose the size matching your stack; caulk/sealant and the finished pipe flashing are used in the installation.
Frequently Asked Questions (FAQ):
Q: Why do I need a vent pipe extension?
A: When additional insulation layers are added to the roof, vent stacks can fall below the code-required height; Tubos restores that height.
Q: What sizes are available?
A: 2, 3 and 4 in. sizes, covering the majority of vent pipes.
Q: Does it work with PVC and cast iron?
A: Yes, the extensions are compatible with both cast iron and PVC vent pipes.
Q: How is it installed?
A: Measure, cut to length, and seal in place with caulk, typically a 3- to 5-minute project.
Q: Does it meet code?
A: Properly installed, the extension brings the vent stack back into code compliance for height above the roof.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Check the code-required stack height above the insulation surface before re-roofing or adding insulation, then select the 2, 3 or 4 in. Tubos matching the pipe diameter. Cut squarely and seal the joint thoroughly with an appropriate caulk so the connection stays watertight under the pipe flashing. It is an easy fix to complete before the new flashing boot is set.
Work on roofs requires fall protection; also confirm stack height requirements with your local building and plumbing code authority before installation.
Get the Tubos vent pipe extension sized for your stack and bring your vents back to code.
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