Xylem MM 414B Series 150E and 157E Low Water Cut-Off/Pump Controllers For Steam Boilers and Other Level Control Applications - Manual (Page 5)

b. Install a water gauge glass (J).
Note: Gauge glass and tri-cocks
not included with product.
J
5
F
E
D
a. Mount and pipe the low water cut-off (D) on a
vertical equalizing pipe (E) at the required ele-
vation level, as determined in Step 1.
Install blow down valves directly below the
lower cross of the water equalizing pipe (F).
STEP 2 - Installing the Low Water Cut-Off
J
H
a. Install a water column (H) (not included with
product) for all models except Series 157E,
(with integral water column).
STEP 3 - Installing a Water Gauge Glass (Required on all steam boilers)
Series 157E All Other Models
GAUGE GLASS
(TYPICAL)
TRI-COCK
(TYPICAL)