Questions and Answers for Rheem 3 in. PVC Horizontal or Vertical Concentric Vent Termination Kit for High Efficiency Tankless Gas Water Heaters

A:  Yes, there is another pipe inside the main pipe.

A:  Hi Cesario and thank you for your question. Yes at the termination.

A:  Hi Donald and thank you for your question. Yes it can.

A:  I dont think you should switch the direction of the Y because the left and right go to two separate channels inside that pipe, one specifically for exhaust and one specifically for intake. If the wrong one is on each, you might end up in a situation where on the outside of your house you are pulling exhaust in through the outside of the intake because the heat from the exhaust is rising and then getting sucked into the intake. Better to find a way to mount it the way they intended or run two separate pipes as per the directions in the water heater instruction book.

A:  Not sure if I can answer your question as I returned this and used the one that is included with the unit (oval shaped) since it was easier to run out the side and not deal with penetrating the roof. I believe the Y has to be connected as shown due to the fact the the straight piece is double walled so that one is incoming fresh air and the other is outgoing exhaust

A:  Thank you for your question, It would have to be a precise cut or it could possibly cause issues like the exhaust being sucked back into the intake.

A:  Hello Mike, thank you for your question. You will need to contact your furnace manufacture or HVAC tech for the correct venting requirements.

A:  Hi alex and thank you for your question. Yes you can.

A:  The top cone can be removed with ease. It comes loose fitted with 4 or 5 parts that you have to cement together. As far as how far over your roof, I believe you have to follow the building code in your area.

A:  Yes the top slides off for installation and then right back on.

A:  Yes you can, hight 24”inches 

A:  If you look at the installation manual there is shown a long sweeping 90 which is supposed to be for vertical installations.  I did not see it installed in the direct venting instructions which for this part but is shown for the case where intake and exhaust piping is used.   I believe not showing  this for the vertical concentric termination kit instructions is a mistake-  Call Rheem to confirm.

A:  Hi Fred and thank you for your question . Fluid coming into the exhaust will come out of the bottom of the unit.

A:  This is design to install horizontal not vertical

A:  It's a vent as long as there is no obstruction you should be good.

A:  Hi Meme and thank you for your question. Please call the number on your unit or in your user manual.

A:  The vent and exhaust are seperate to the base y, then they exit the roof/wall together. How you route prior to the y is up to you.

A:  Hi Greg and thank you for your question. No, they must run parallel to each other all the way to the termination.

A:  Yes!  Don’t purchase this concentric pipe.  Just purchase individually fittings to fit your installation.  

A:  Yes they allow the vent and intake to run separately 

A:  Hi maxtulsa and thank you for your question. Yes it can.

A:  You might be able to use the same hole through your roof that the old vent pipe went through, but unless the old and new pipes are nearly the exact same diameter you're going to have a very hard time getting that to work. I'd recommend against going that route

A:  No.  It serves as both an exhaust and intake for combustion.  There are two tubes that are concentric and the end needs access to the exterior of the structure.

A:  Hi charles taylor and thank you for your question. The venting system needs to run from the unit all the way to the outside.

A:  No