Direct vent tankless water heater

Here is the vent for the tankless water heater. What do you see? What comments would you make?

Looks to me like he lost the manufactures instructions .
I sure would not want this amateur installation in my home .

Please specify Roy. This is a teaching thread. Thank you.

There should be an upward pitch not a downward pitch as it appears in this foto. But 2 points for that installer for not cutting out that support beam to make it have an upward pitch. Must ve had some knowledge i assume

Is that even Schedule 40? Looks like thinner wall drainage pipe PVC to me.

Originally Posted by rcooke http://nachi.cachefly.net/forum/images/2006/buttons/viewpost.gif
Looks to me like he lost the manufactures instructions .
I sure would not want this amateur installation in my home .

Please specify Roy. This is a teaching thread. Thank you.

Sorry.
Looks like wrong slope fore vent should be 1/4 inch per foot up to out side .
Is it approved gas vent pipe??? no printing visible
Looks like wrong glue good installer’s use blue cleaner then glue .
Should have mounted heater lower to get proper vent slope.
Would like to see a pipe support .
Not sure of the outside does it exhaust to close to a window ???

just another halfast install that requires immediate reorientation for proper vent function to avoid CO poisoning occupants
ubbink rolux vent system

Horizontal Termination Installations

A condensate collector MUST be installed on the vent system for any horizontal
termination with a total vertical rise greater than 5 feet. (1,5 m)

Slope horizontal venting 1/4 inch per foot (25 mm/m) either toward the appliance with a
condensate collector or toward the exhaust terminal
(Ubbink prefers pitching the vent
1/4 inch per foot (25mm/m) towards the appliance with a condensate collector).

If a condensate collector is NOT used for horizontal terminations, it is permitted to pitch
the vent 1/4 inch per foot (25 mm/m)** toward the termination under the following**
conditions:

If the water heater is in that little closet, the pitch is most certainly improper. In addition, the connections are of an improper orientation - female connection should be toward the appliance.

I don’t see many tankless heaters with PVC vents, so I would be looking to verify the proper vent-materials. Most of the one’s I see are stainless vents, although I have seen a few that allow PVC.

Now i can take measurement by myself.