Missing drainage vent?

[Ron Benchetrit]

Hi all,
My A/C works mostly fine delivering cold air as expected, but the air handler does gurgle quiet a bit. I also see very little water coming out of the drain line outside. I see a capped drain vent right of the trap, shouldn't there be one on the left of the trap? Does my setup look correct?
Thanks for any tips,
Ron

 

[RetiredInGueydan]

There needs to be an vent downstream of the trap to prevent these noises and the secondary drain line needs to be lowered to function properly.

 

[Sponsor]

 

[Ron Benchetrit]

There needs to be an vent downstream of the trap to prevent these noises and the secondary drain line needs to be lowered to function properly.

Thanks for confirming, I will add a vent downstream of the trap for the primary.
The secondary is the vertical pipe right? Can I reroute this horizontally into the pan? Does it also need a trap?
(btw, the pan does indeed have a kill switch in case it overflows.)

 

[Fitter30]

Piped totaly wrong. At coil that air vent take it out put a plug that hole. Still have the plastic one use it. Other coil fitting trap comes right off coil if it doesn't clear the drain pan short piece of pipe then trap(don't glue the trap for ease of cleaning or use unions). Since trap will be higher than drain line use a tee instead of a ell after the trap( straight through is vertical) The open end put a short piece of pipe for a air vent. Drain pan doesn't need a trap would run a separate line than the coil. If coil line stops up pan could overflow wipeout your ceiling. Test that overflow switch. If the drain line runs into a plumbing vent might get sewer smell in winter when condensate trap drys out. Need a diagram just ask.

 

[Ron Benchetrit]

Hi eveyone, thanks for all the tips. I replumbed the drainage and added a bit of duct tape to the housing and now have a silent air handler! No more gurgling and no more whistling. The drain outlet outside is a consistent light flow, no sudden rush after the unit stops running.
Thanks!