Paul Somlo
New Member
I'm replacing a Takagi T-KJr tankless with, most likely, another Takagi, their smallest condenser. Current one is not a condenser and I'm using stainless steel Z-Vent (4"). The first Z-Vent section above the heater is a combination backflow preventer/condensate drain. Do I need a backflow preventer on the new condenser? I've got a 5 to 6 ft. vertical run through the roof, plan is for indoor intake air. I would just reuse the current venting, but the exhaust on the new heater is farther out from the mounting surface. Which means, I may ditch my Z-Vent and go with PVC. Of course, I don't even know if backflow prevention is offered in PVC, maybe it's not. So, not sure where to go with this - I could go with some sort of Z-Vent offset, I suppose, expensive stuff. Not sure if there's compatibility between Z-Vent and PVC, size-wise. If so, could do the offset in PVC. And moving the vent pipe is not an option - I just had a $20,000 flat roof put on last winter.
Hoping some of you can throw out ideas on this. Climate is Colorado.
Paul
Hoping some of you can throw out ideas on this. Climate is Colorado.
Paul