Tee's – 90°      

     Plain Tee, 180° Cross Tee & 135° Cross Tee
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plain tee Plain Tee
(T-1)
Dimensions to be listed in order of A, D  
cross tee 180° Cross Tee
(T-2-180)
Dimensions to be listed in order of A, C, D  
135 degree cross tee

135° Cross Tee
(T-2-135)

Typical radial angle shown.
Any angle available.

Dimensions to be listed in order of A, C, D  

       Double Parallel Tee, 90° 4-Branch Cross Tee’s – 90°
       & 135° 4-Branch Cross

      Tee's – 90°
double parallel tee Double Parallel Tee
(T-2-P)
Dimensions to be listed in order of A, C, D  
90 degree 4 branch cross tee

90° 4-Branch Cross
(T-4-90)

Typical radial angle shown.
Any angle available.

Dimensions to be listed in order of A, C, D, E, F  
135 degree 4 branch cross tee

135° 4-Branch Cross
(T-4-135)

Typical radial angle shown.
Any angle available.

Dimensions to be listed in order of A, C, D, E, F  
Tee's – 90°      

     180° 4-Branch Cross Tee, Reducing Tee
     & 180° Reducing Cross Tee
180 degree 4 branch cross tee

180° 4 Branch Cross
(T-4-180)

Typical radial angle shown.
Any angle available.

Dimensions to be listed in order of A, C, D, E, F  
Reducing Tee
(T-1-R)
Dimensions to be listed in order of A, B, D  
180 degree reducing cross tee

180° Reducing Cross
(T-2-R-180)

Typical radial angle shown.
Any angle available.

Dimensions to be listed in order of A, B, C, D  

       Airflow Tee & Reducing Airflow Tee

      Tee's – 90°
airflow tee

Airflow Tee
(AFT-1)

Engineering Note
Recommended for HVAC only.
Close coupling of elbows and branch fittings should be avoided if at all possible. The total pressure loss of two close-coupled fittings will generally be greater than the sum of the individual fitting losses. For example: both the 45° lateral and 45° elbow individually are
proved to be low loss fittings. However, when they are joined to form a 90° branch, the combined performance is not as good as a conical tee or the airflow tee. This is a particularly important point to consider because the airflow tee (this page) or conical tee (next page) is less expensive and
is more compact than the combination lateral-elbow. For best economy, the designer should use the conical tee or combination tee when low branch losses are important; and the straight 90° tee should be used when a higher
loss fitting can be tolerated.

Reducing Airflow Tee
(AFT-1-R)

Dimensions to be listed in order of A, D


Dimensions to be listed in order of A, B, D
 
Tee's – 90°      

     Conical Tee, Conical Reducing Tee
     & Bullhead Tee
conical tee

Conical Tee
(T-1-C)

Dimensions to be listed in order of A, D,  
conical reducing tee Conical Reducing Tee
(C-1-C-R)
Dimensions to be listed in order of A, B, D  
Bullhead tee

Bullhead Tee

Dimensions to be listed in order of A, B, C,  
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11419 Yellowpine St. NW - Minneapolis, MN 55448 - Ph: 763-755-7677 - 1-800-426-3643 - info@spiralmfg.com