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Description
2 in. / 4 in. x 19.5 in. Plastic Condensing Vent Pipe Extension KitPrecisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to 8 tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor, and longer vent lengths than ever possible with single unit tankless water heater venting. California residents see Prop 65 WARNINGS Concentric venting reduces install
Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to 8 tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor, and longer vent lengths than ever possible with single-unit tankless water heater venting.- California residents
- Concentric venting reduces install time and costs
- Water heater accessories
- Easy assembly/adjustment
- Concentric venting allows for secure connection
- 2 in. / 4 in. condensing vent pipe extension 19.5 in.
- For use with Sensei Se+ tankless water heaters (condensing) and m-series boilers
- White finish
- Package quantity: 1
- Plastic construction
- 1-year limited warranty
- *Note. Rinnai is changing the language in its warranty terms and conditions found in the current User Installation manuals. The existing statement will be replaced by the following: “This Limited Warranty applies only to products that are installed in the United States and Canada. Improper installation may void this Limited Warranty. It is recommended that a trained and qualified professional who has attended a Rinnai installation training class complete your installation.” All warranties (old or new manual) will be honored as written above.
Features
| Item Weight | 1.65 |
| Includes | No Additional Items Included |
| Pack Size | 1 |
| Finish Family | White |
| Returnable | 180-Day |
| Vent Part Type | Straight Vent |
| Product Weight (lb.) | 1.65 |
| Material | Plastic |
| For Use With | Gas Tankless |
| Product Height (in.) | 4.33 |
| Product Depth (in.) | 20.08 |
| Product Width (in.) | 4.52 |
| Manufacturer Warranty | 1 Year limited warranty |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
100% worth the money
Size: 16'' x 43'', Size: 16'' x 43''
Great product. They look good and function well.
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Reviewed in the United States on February 6, 2026
★★★★★ 5
Cheaper than the supply house.
Size: 42'' x 28''
I used black pipe similar to this to build some shelves in my man cave. I went looking to build a studio desk and found that Lowe's wanted $8 per floor flange (~$96 just for flanges and not including the pipe, tees, or the other fittings). Even supply house dot com wanted $4 per flange (~$48, but was still missing the other parts AND they didn't offer them because of supply chain issues). For about $65, this was a great buy. Yes everything is greasy. This will be the case regardless of where you buy it. I used some gloves, shop towels, and acetone and it cleaned up easily. For a top, I used a pre-made countertop from Lowe's (~$100) and a 1x4 piece of poplar I had sitting around.
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Reviewed in the United States on January 7, 2023
★★★★★ 4
Pipes don't assemble square, nice stand though.
Size: 42'' x 28''
These arent standard SCH40 pipe for starters. Significantly lighter. Easier to move around and sturdy enough to support a table, but this isnt pipe. As such, when I threaded it together, it wasn't square. I was able to flatten it mostly, but I had to use a clamp to bend the assembled piping to sguare so it would attach to the table runners. It's fine, but it surprised me. It looks nice, and it provides plenty of support for the table. All good. Several folks complained that the pipes are oily. They are supposed to be to prevent rust. I wiped them down with a few cleaner wipes, and they are fine. Be aware that this doesn't come with instructions or the wood screws you may need for your table top.
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Reviewed in the United States on February 8, 2023
★★★★★ 5
Sturdy & Tuff going on 6 months +
Size: 28'' x 14'', Size: 28'' x 14''
I mounted a thick heavy piece of butcher block to these legs and made a desk. Easy to assemble and install. Mark the holes, pre drill pilot holes and screw them in. I will say I knew they were going to be greasy out of the box. They grease them in the factory to prevent rusting so just wipe them off with an old rag and your good to go. They haven’t felt wobbly or anything like that and butcher block is pretty heavy. I have to say I love them and much cheaper than buying from the hardware store. I’m thinking about building a second one and I would definitely purchase again. Again very sturdy and easy to assemble. People mad about the grease need to realize it’s done as an anti rust measure and it wipes right off and zero rust thus far.
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Reviewed in the United States on March 6, 2023
★★★★★ 1
Absolutely not.
Size: 28'' x 14'', Size: 28'' x 14''
Truly terrible product. If you're wanting extreme DIY, aka cleaning it repeatedly, no instructions, and still not impressive quality, this is the item for you.
After much time spent trying to remove the nasty oily substance all over the pipes and some sort of weird dirt coming out of the pipes as well, it still hadn't fully come off. When cleaning off the grease, it also took the color off of the item and created a weird, lined look on the pipes, like it was some legit oil rubbed crud on it, instead of paint to look oil rubbed.
There is also what appears to be rust on some of the pieces. If someone actually wanted to use the desk and actually bumped into one of the pipes, it would without doubt leave oily residue on clothing. Pictures included of the box without pieces in it as it beautifully captures just how much crud was all over.
100% do not recommend and would give zero stars if it was allowed, but alas.
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Reviewed in the United States on August 4, 2025