Installation guide
DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 41
Table 41-1: 
Pitch of dispersion tube(s) and interconnecting piping for single tube or multiple tube evaporative dispersion units*
Condensate drain
Type of
interconnecting piping
Diameter of
dispersion tube and
interconnecting piping
Pitch of
interconnecting piping
Pitch of
dispersion tube(s)
Pitch of
condensate drain
Without drain
Vapor hose
1½" (DN40)
2"/ft (15%)
toward humidifier
2"/ft (15%) 
toward humidifier
No drain
2" (DN50)
Tubing or pipe
1½" (DN40)
1/8"/ft (1%)
toward humidifier
2" (DN50)
With drain
Vapor hose
1½" (DN40)
2"/ft (15%) 
toward humidifier
1/8"/ft (1%)
toward
condensate
drain
¼"/ft (2%)
toward floor drain or 
toward humidifier if 
humidifier is below 
dispersion unit
2" (DN50)
Tubing or pipe
1½" (DN40)
½"/ft (5%)
toward humidifier
2" (DN50)
¼"/ft (2%)
toward humidifier
Notes:
* When piping over an obstruction, see the drip tee installation illustration on Page 39.
•  Assemble multiple dispersion tubes or use a Rapid-sorb or Ultra-sorb dispersion assembly where necessary to accommodate maximum humidifier load. 
•  The smallest GTS humidifier steam outlet is 2" (DN50). Install an adaptor manifold if using multiple 1½" (DN40) dispersion tubes. See also Table 37-1.
Dispersion:
Single tube and multiple tube
Installation










