Should there be a pvc pipe leading to nothing coming out of the side of the unit? it smells like gas when the heat kicks on in the area where the unit is and the odor runs throughout the house. should I be concerned? should this pipe be a vent leading to outside?

Is this a high efficiency furnace with pvc leading outside.
If yes check to see if unit is vent properly with the pipe with the correct pitch .
Dies anyone say wherethe noise might be coming from

ok rocky, the colloid pipe is attached to a rubber elbo that fits on the side of the carburetor it goes to a aluminum pipe that goes to the pvc port. this is why it wont run. the pvc works off the engine vacuum and sucks gas as needed. if it is not hooked up it cant suck. this is why it runs when you pour gas in the carburetor. i hope this gives you an idea.

Hi LaTrice:
Tankless water heaters are essentially little gas fired furnaces that heat water, not air. When natural gas burns, a by-product of the combustion is water vapour. Since the furnaces are very efficient, the exhaust gas temperatures are relatively low, and as they go out the duct, they drop even more and the water vapour present condenses and runs back down to a capture device so that it does not dribble all over your floor.
This drain pipe is supposed to go to your sewer (or building drain) and is also supposed to be protected by a TRAP that needs to have a minimal amount of water present to prevent sewer gases from coming back into the room. In hot dry weather, these traps can dry out as there is not as much condensation present.
It could be that when the unit was installed, it was connected by way of a trap that did not have a means of staying primed.
Hope this helps.
RBO (Retired)

Hi Joe

Is that pex pipe on the right your water supply to the washer?

Your sewer gas smell I believe can be eliminated by putting a P trap in the drain PVC line.

(EDIT)
Where the drain hose from the washer hooks into the PVC pipe is NOT airtight which would allow the sewer gas back into the laundry room!

(EDIT EDIT)
If there is a P-trap in your outflow pipe, the only place left for grey water to collect (and stink) would be between the washer and where the waste hose goes into the drain. We've had to use a little bit of bleach on occasion when we haven't used the washer for a bit.
Hope this helps
-Steve

the switch is a service or emergency switch if the condensation hose / line is not a sealed connection and the trap is empty the sewer smell will be constant either make it a sealed connection or close off the trap and reroute the condensation line --during heat season not condensation so heat will cause water in to evaporate

probably a leaking fuel pipe check under the car near the back of car check around fuel pump as the conections rust and leek eventually check all piping around this area mine has done the exact same thing 1994 c180

Hello Jmranes,
It sound to me like your getting alot of condensation on your exhuast pipe and a weep hole was drilled to "BAND AID" the issue. These is not how 90% plus furnaces are installed. If you are referring to the outside intake and exhaust PVC piping, then there shouldn't be any weep holes. When the furnace is properly installed, the furnace comes with a condensate kit (refer to owners manual) that is mounted on the side of the furnace and all the condensation that collects overflows and should be piped directly into a floor drain. As for the intake and Exhaust for side discharge application, the Exhaust PVC pipe should come out through the side of house and immediate goose neck up (90 degree) with a straight piece of PVC pipe about 2' to 3' or so in length, then a final 90 degree PVC fitting on that so the exhaust blows out. As for the intake, that also comes out the side of the house about 2" to 3" inches parallel to the Exhaust but should only be a 90 degree PVC fitting facing down. The idea here is making sure the furnace doesn't suck in exhaust air. Also, making sure proper size pipe was used. Both outside pipes should be open to atmosphere. I hope this helps.

most furnaces require 4 inch vent pipe to be installed ... you can use pvc as long as it is rated for the temperature... there should be an obvious hole in the furnace where the enducer draft motor pushes the exhaust... if this is a upflow unit in the closet you will need to connect to the bell housing of the exhaust and start running your pipe up and out side .you will need double wall pipe rated for heat and or rated pvc if installing pvc... once outside make sure if on rood you have a roof jack for pipe to go through and a collar around pipe to keep water from running down and then a cap on pipe ....if it is a horizontal unit done the same way except your already in attic and don't have a as far to go it can run vertical and horizontal try to minimize your 90 degree turns and is best to keep it angled to prevent moisture from buiding up in pipe...

Hi, if the unit is leaking and it looks as though it is coming from the PVC pipe, more then likely its leaking at the unit its self where the pipe connects. Water will run down the pipe and drip down line. Dry it off and put your hand around where the PVC pipe screws into unit. Unless the pipe is cracked, this is where the leak is. If the fitting is a male or female threaded PVC fitting and a piece of PVC pipe that goes to the drain, you can repair this very easy. Just cut the pipe near the fitting with a hacksaw. Unscrew the fitting that goes to unit. Go to a hardware store like Home Depot, take the old fitting with you and buy a replacement. Buy a coupling, a small can of clear PVC glue and a small can or tube of pipe dope to put on the fitting threads. Screw the fitting in first and make sure it has pipe dope on it, get it tight with pliers. Take the pipe and coupling and glue it on the pipe. Put glue on the other end and slide it in the fitting that was where it was leaking before. Hold it in place for a few seconds. Once you put the glue on, be ready to put it together as it drys super fast and you cant take it apart once it sets. Very easy to repair and the parts cost pennys. Keep me posted. You can do this and will learn about plumbing! Good Luck.
Shastalaker7

You need to clean the pvc, prime it and reglue it and this should take care of your problem