Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.


hey guys

just want to know when traps should be used in ac/r refrigerant lines.

and i replaced a compressor on a r-22 refigeration system the condensor is on the roof about 12 feet above 2 evaporators(the 1 condensor feeds 2 evaps) should there be traps on the suction line??
ASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
[email protected]


  • Techman
    Techman Member Posts: 2,144

    From the outlet of the evap to the suction line where it goes horizontal on the roof is what distance? What tonage? Capacity control?What size  is the common suction line? Are the two evaps coils side by side to each other ? Does each evap work independently or both evaps on/off at the same time? Usually there are traps @ the evap coils and [depending] there might be an inverted trap at the roof .Usually w/ this short of a riser an oil trap is not required.
This discussion has been closed.