Selkirk - 12" to 30" Pipe Increaser (Round Large - Type B Gas Vent)

SelkirkSKU: 10RIX12-S

Sale price$377.29
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Size: (12" Pipe) Increaser 10" to 12"
⛟ Estimated Delivery Date: Between and to all states excl. Alaska & Hawaii.


Selkirk presents a breakthrough in venting technology with our 12" to 30" Pipe Increaser. Ideal for multi-family and commercial applications, this increaser stands out for its quick and easy installation. Crafted with a double-wall design featuring an aluminum inner liner and galvanized outer wall, it ensures optimal venting action and minimal condensation. The snap lock ends make assembly a breeze, while its Smart Choice warranty underscores our commitment to quality.


  • Enhanced Ventilation: Increase vent size effortlessly.
  • Industrial Durability: Ideal for commercial and multi-family applications.
  • Quick Installation: Snap lock ends for easy assembly.
  • Minimal Condensation: Aluminum inner liner for efficient venting.
  • Versatile Sizing: Increases up to 4 sizes.
  • Smart Choice Warranty: Confidence in quality components.
  • Compliance Assurance: Listed to UL 441 in the U.S.A.


  • Aluminum Inner Liner: Facilitates quick vent action.
  • Galvanized Outer Wall: Ensures long-lasting durability.
  • Double-Wall Design: Maintains a 1/2" uniform airspace.
  • Easy Assembly: Snap lock joints for a hassle-free setup.
  • Size Range: Increases vent size from 12" to 30".
  • Clearance to Combustibles: 1" for diameters 10"-30".
  • Compliance: Listed to UL 441 in the U.S.A.


  • Model: R Double Wall Type B Gas Vent
  • Diameters: 10" to 30"
  • Inner Liner: Aluminum
  • Outer Wall: Galvanized
  • Airspace: 1/2" uniform airspace
  • Clearance: 1" for diameters 10"-30"
  • Assembly: Snap lock joints
    Product Code
    Part No Size
    2003619 10RIX12-S (12" Pipe) Increaser 10" - 12"
    2003620 10RIX14-S (14" Pipe) Increaser 10" - 14"
    2003638 12RIX14-S (14" Pipe) Increaser 12" - 14"
    2003621 10RIX16-S (16" Pipe) Increaser 10" - 16"
    2003639 12RIX16-S (16" Pipe) Increaser 12" - 16"
    2003676 14RIX16-S (16" Pipe) Increaser 14" - 16"
    2003622 10RIX18-S (18" Pipe) Increaser 10" - 18"
    2003640 12RIX18-S (18" Pipe) Increaser 12" - 18"
    2003677 14RIX18-S (18" Pipe) Increaser 14" - 18"
    2003694 16RIX18-S (18" Pipe) Increaser 16" - 18"
    2003821 12RIX20-S (20" Pipe) Increaser 12" - 20"
    2003678 14RIX20-S (20" Pipe) Increaser 14" - 20"
    2003695 16RIX20-S (20" Pipe) Increaser 16" - 20"
    2003712 18RIX20-S (20" Pipe) Increaser 18" - 20"
    2003679 14RIX22-S (22" Pipe) Increaser 14" - 22"
    2003696 16RIX22-S (22" Pipe) Increaser 16" - 22"
    2003713 18RIX22-S (22" Pipe) Increaser 18" - 22"
    2003730 20RIX22-S (22" Pipe) Increaser 20" - 22"
    2003697 16RIX24-S (24" Pipe) Increaser 16" - 24"
    2003714 18RIX24-S (24" Pipe) Increaser 18" - 24"
    2003731 20RIX24-S (24" Pipe) Increaser 20" - 24"
    2003748 22RIX24-S (24" Pipe) Increaser 22" - 24"
    2003715 18RIX26-S (26" Pipe) Increaser 18" - 26"
    2003732 20RIX26-S (26" Pipe) Increaser 20" - 26"
    2003749 22RIX26-S (26" Pipe) Increaser 22" - 26"
    2003766 24RIX26-S (26" Pipe) Increaser 24" - 26"
    2003733 20RIX28-S (28" Pipe) Increaser 20" - 28"
    2003750 22RIX28-S (28" Pipe) Increaser 22" - 28"
    2003767 24RIX28-S (28" Pipe) Increaser 24" - 28"
    2003783 26RIX28-S (28" Pipe) Increaser 26" - 28"
    2003751 22RIX30-S (30" Pipe) Increaser 22" - 30"
    2003768 24RIX30-S (30" Pipe) Increaser 24" - 30"
    2003784 26RIX30-S (30" Pipe) Increaser 26" - 30"
    2003799 28RIX30-S (30" Pipe) Increaser 28" - 30"

    Warranty: Lifetime Limited Warranty

    Refer to the Smart Choice Warranty for full warranty details.


    About The Manufacturer:


    Selkirk products set themselves apart from the competition with their proven quality, safety, ease of installation, and lasting performance.  Selkirk is one of the most trusted brands in the industry because we stand behind everything we do.  From assisting with product selection, providing education and installation assistance, to our industry-leading warranties, we ensure your success every step of the way.

        Order Confirmation:

        Upon placing your order, you will promptly receive an email confirmation. Subsequently, we will conduct a thorough inventory check to ensure all items are in stock and available for immediate shipment. If your order aligns with the advertised delivery timeframe, we will promptly process it for shipment to our warehouse. In cases where the expected delivery time extends beyond the advertised timeframe, we will reach out to you via email and/or phone for confirmation.

        Order Shipment:

        Within one business day of your item being shipped, you will receive an email confirmation containing a tracking number. If you do not receive tracking information within six business days of placing your order, please don't hesitate to get in touch with us for assistance.

        Estimated Time of Arrival:

        Our typical delivery timeframe ranges from 2 to 10 business days. Custom-made products generally require 3 to 5 weeks for delivery. If the expected delivery date for your order would fall outside of the advertised 2-10 business day time frame, our customer service team will contact you to ensure your agreement with the revised timeline.

        Covered Areas:

        Please note that all estimated delivery dates and shipping costs advertised on our website apply exclusively to the Contiguous United States. For inquiries regarding shipping to Hawaii or Alaska, kindly reach out to our customer service team. While we do not offer direct shipping to Canada, we are more than willing to ship your order to the freight carrier of your choice.


        It is very important that you inspect the packaging of your items when they arrive and check if you received all boxes listed on the delivery receipt. If you notice any damage or shortage of packages, you must make note of it on the bill of lading, take pictures, and refuse delivery. Your note should say "refused due to damage". You must also take photos of all sides of the box and send them to us within 2 days. If there are no damages visible before opening the box, you must note "subject to further inspection may contain concealed damage". If you notice any damage after receiving the delivery, do not throw the box away, and contact us with the photos. After we receive information from you about the refused delivery or concealed damage, we immediately initiate a claim with the shipping company or with the manufacturer. After the claim is fully processed, we ship all replacements at absolutely no cost to you.

        Cancellations & Refunds:

        We offer free order cancellations before the shipping label or Bill of Lading is generated, or prior to the commencement of production for custom orders. Please note that custom-made items are not eligible for refunds once production has begun. To be eligible for a return, the item must be unused and in its original condition, with all packaging intact and in perfect condition. Orders delivered outside of the United States are not eligible for refunds. If your order arrives damaged, please refer to the "Damages" section. Our refund policy extends for 30 days. If 30 days have elapsed since your purchase, regrettably, we cannot process a refund. Prior to returning an item, please contact us to discuss shipping details. All refunds will be credited to the original credit card or PayPal account used for the purchase, within two days of receiving the returned items at our warehouse.

        Please contact for any questions regarding shipping time.

        At Belleflame, we're committed to providing our customers with the best prices on the market. That's why we offer a 110% best price guarantee. If you find a better deal on the same product somewhere else, just let us know and we'll beat it by an additional 10%.

        We believe that shopping should be easy, convenient, and most importantly, affordable. That's why we work hard to bring you the lowest prices on the products you love. But if you do happen to find a better deal elsewhere, we'll go the extra mile to make sure you get the best deal possible.

        Here's how it works:

        • Find a lower price on the same product from another retailer.
        • Contact us with the details of the offer, including the website or store name, product name, and price.
        • We'll verify the price and beat it by an additional 10%.

        It's that simple! Our 110% best price guarantee ensures that you'll always get the best deal possible when you shop with us. So, why wait? Start shopping now and experience the difference of shopping with Belleflame.

        At Belleflame, we believe that shopping should be simple, stress-free, and most importantly, enjoyable. That's why we work hard to bring you the best products, prices, and customer service in the industry.

        Here are just a few reasons why you should choose us:

        • Wide Selection of Products: We offer a vast selection of top-quality products from the leading brands in the industry. No matter what you're looking for, we have something for everyone.
        • No Sales Tax, no Hidden Fees: just the lowest prices on the market. When you shop with us, you can rest assured that the price you see is the price you'll pay. No matter where you live, you can enjoy tax-free shopping with us.
        • Fast and Free Shipping: We understand that you want your products as soon as possible. That's why we offer fast and free shipping on all orders.
        • Easy Returns: We want you to be completely satisfied with your purchase. If for any reason you're not happy, just let us know and we'll make it right.

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