Can you install 3" type b pipe in 4" stainless steel fasnseal single wall pipe

Home Maintenance Questions and AnswersCategory: Water Heater VentingCan you install 3" type b pipe in 4" stainless steel fasnseal single wall pipe
Question by Rob Butterfield

I currently have a tankless gas water heater that has 3″ type b intake venting and 4″ stainless steel fasnseal single wall type bh exhaust venting.  I am replacing it with a 50 gallon gas tank hot water heater.  Can use the existing 3″ type b intake vent to vent the tank hot water heater if I cap the existing 4″ exhaust vent or because 3″ is lower on the roof line than the existing 4″ exhaust vent could it cause exhaust fumes to come back in the garage?  As an alternative can I run new type b 3″ inside of the existing 4″ single vent all the way to the roof?   

Your Answer

1 + 17 =

Pin It on Pinterest

Share This

Share this post with your friends!

I'm selling my checkthishouse.com domain and this website.

I created it in 2001 for my home inspection business so it's a well established property with around 150 home improvement related posts. It also comes with a Youtube channel and a Q&A forum.

Website can be easily adopted for any home inspection / home improvement related business. Makes money on daily basis without even being touched, although it could make much more, I just don't have time to maintain it.

If you're an Illinois based home inspector I'll add http://homeinspectorillinois.com domain to this deal.

Inquiries and legitimate offers ONLY -

 Click HERE

BUY THIS WEBSITE!