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Model Number Designation
Type Key
Example:
Circulator Pump
Circo for Open Circulation (Bronze)
Classic for Closed Systems (Cl)
S = Multiple Speed
Maximum head [ft]
Pump housing
Pipe connection
(Circo) Classic Star S 16 ( ) FX
= constant speed (no letter)
= Cast iron (no letter = cast iron)
= Bronze
= Flange
= Flange rotated 90
= Union connection
= ½” Internal sweat
= ¾” Internal sweat
B
F
FX
U
S5
S7
WILO Check Flange
Fits all WILO residential flanged circulators
Easy to clean
Easy to remove air locks
Cost effective
Farther away from turbulent water
WILO Check Flange
FX
“F” Configuration
F
“FX” Configuration
(Flange rotated 90°)
t
ors
WILO C
h
e
ck
WILO USA LLC
1290 N 25th Ave.
Melrose Park, IL
60160
1-866-WILO-USA
www.WILO-USA.com
WILO Canada Inc.
Bay #7 - 2915 10th Ave. NE
Calgary, Alberta
T2A 5L4
1-866-WILO-CDN
Www.WILO-CANADA.com