Aprilaire 1150 Installation, Operation And Maintenance Manual page 32

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 .
fIgURE 27 – Drip Tee Installation
Insulate tubing and
hard pipe to reduce
steam loss
To distribution
tube
6" (150 mm) recommended
8" (200 mm)
minimum
1" (25 mm)
air gap
32
Steam hose
or hard pipe
Humidifier
Dashed lines indicate
provided by installer .
Copper tubing or pipe drip tee,
by installer
Minimum size ¾" (DN20) rated for
212° F (100° C) minimum
Funnel or floor drain .
Refer to governing codes for
drain pipe size and maximum
temperature requirements .
OM-4050