Aprilaire 1150 - Manual (Page 26)

DISTRIBUTION DRIP TEE INSTALLATION
If the humidifier cannot be mounted below the steam distribution tube, such that there is a minimum 2”/ft (15%) pitch along the
entire hose length, a drip tee as shown below must be installed. Failure to follow the recommendations on this page, when the
humidifier is mounted higher than the distribution tube, can result in excessive back pressures on the humidifier. This may lead to
distribution tube spitting, steam blowing through the P-trap before the plumbing system, or leaking gasket.
IMPORTANT: Steam hose must be supported to prevent sagging or low spots.
OM-4009
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Humidifier
Funnel or floor drain.
Refer to governing codes for
drain pipe size and maximum
temperature requirements.
1” (25 mm)
air gap
8” (200 mm)
minimum
6” (150 mm) recommended
To distribution
tube
Dashed lines indicate
provided by installer.
¾” (DN20)
Steam hose
or hard pipe
Insulate tubing and
hard pipe to reduce
steam loss
Copper tubing or pipe drip tee,
by installer
FIGURE 23 – Drip Tee Installation
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