Just bought a house that had a new furnace installed this summer. Vent number 1 in the image is for the furnace (2 is the water heater and 3 is sump). As you can see in the image, 2 and 3 both would require water (rain/snow/whatever) to travel up before getting into the pipe, but the vent for the furnace doesn't. I am worried that a winding raint or snowy day, and moisture could blow right into this vent. From there is a straight and down path into the furnace.
Can I (or should I) install some type of flap or add another bend to the PVC to point it down?
I did notice that both neighbors seem to have the exact same setup as mine, and this is the first house I have owned so I just am not sure.