Selkirk 8''-18'' QC Increaser 8x18 - 108318 - 8RV-I18QC

Almost never undersold. If you find a better price e-mail us their quote and we'll likely beat it. Let us quote your pipe. Our NFI Master Hearth Certified Technician will evaluate your pipe installation project and give you a customized quote. Whether it is one piece or a larger project we can help. Call or e-mail us today!

Selkirk 8''-18'' QC Increaser 8x18 - 108318 - 8RV-I18QC

Used to increase pipe diameter
The QC line of MetalBest vent pipe and fittings is designed for large residential, industrial and commercial applications. Round vents for smaller appliances will be found in the preceding RV section.
NOTE: Size refers to the inside diameter of the pipe or fitting. The outside diameter is approximately 1'' larger. Many QC components larger than 24'' are not listed. Please have customer service contact manufacturing if you have special requirements. 18'' and larger QC is build to order/No Returns

Lead time on all Selkirk product is 5 working days plus ship time. Most pipe will deliver within 7-10 business days. If you have any questions or concerns about delivery, please e-mail us at:

Click to see the Selkirk RV QC OVAL Type B Gas Vent Catalog

Click to see the Selkirk Type B Gas Vent Installation Sheet

Click to see the Selkirk Gas Vent Submittal

Click to see the Selkirk Gas Vent Warranty Information

Click to see the Selkirk Gas Vent Sizing Handbook

Click to see the Selkirk QC Type B Products

Click to see the Selkirk Type B Gas Vent Buyers Guide

Selkirk MetalBest was formerly known as Selkirk Metalbestos.

Part Number / Product Code: 108318 8RV-I18QC

California residents please click on the link for information on Proposition 65 BEFORE purchasing.

Tags: 8RVI18QC Selkirk QC Type B Gas Vent 18 - Chimney Pipe / Venting Pipe

Supply chain disruptions have greatly impacted inventory levels in our industry, as well as in many other organizations across the globe. We want to personally acknowledge these shifts in supply levels have affected our ability to surpass your expectations in many situations for prompt delivery of your order. Should you not be able to wait for supply delays, please contact us about stock levels before ordering. As always, we thank you for your business!