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© Copyright 2018 Caleffi

Function

The Caleffi SEP4™ combination separator is a device that 
incorporates four critical functions for hot or chilled water systems. 
It combines high performance air and dirt (magnetic and non-
magnetic) removal into the hydraulic separation function which makes 
the primary and secondary circuits connected to it hydraulically 
independent. The SEP4™ features an internal coalescing element 
that continuously and automatically eliminates air micro-bubbles with 
the simultaneous removal of dirt particles as tiny as 5 microns. The 
air discharge capacity is very high, with the capability of automatically 
removing all the air present in the system down to the micro-bubble 
level. The 4-in-1 high performance functionality of the SEP4™ saves 

system installation and maintenance costs as there is no need to 
include separate air and dirt separators. In addition to removing solid 
impurities in the system without isolating the separator or shutting 
down the system, the added powerful removable external magnet 
belt (union) or probe(s) (flanged) in the lower body removes up to 

100% of the ferrous impurities, including magnetite, that can form in a hydronic system. The SEP4™ 
has 2½ times the ferrous impurities removal performance of standard air and dirt separators.
These items are designed for use in closed hydronic systems. Do not use in plumbing applications. These 
items do not meet the low-lead plumbing standards of U.S. and Canada.

 SAFETY INSTRUCTION

This safety alert symbol will be used in this manual to draw attention to safety related instructions. 

When used, the safety alert symbol means 

ATTENTION! BECOME ALERT! YOUR SAFETY IS 

INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD.

CAUTION: 

All work must be performed by qualified personnel trained in the 

proper application, installation, and maintenance of systems in accordance 

with all applicable codes and ordinances.

SEP4™ 4-in-1 hydraulic, air, dirt 

            and magnetic separator, ANSI flanged

38712.07

5495, NA549_AM Series

Installation, commissioning and servicing instructions

Product range

5495 series

       SEP4™

 hydraulic, air, dirt and magnetic separator in steel

     

with flanged connections, drain and insulation

 

connections 2” – 4” ANSI

NA549_M series

  SEP4™

 hydraulic, air, dirt and magnetic separator in steel with flanged

     connections and drain, ASME 

connections 2” – 14” ANSI

-pre-formed insulation shell included on 2” – 4” sizes.
-CRN approval for  2” – 8” sizes; consult factory for 1

2

-14” sizes.

www.caleffi.com

WARNING:

 

This product can expose you to chemicals including lead, which is known 

to the State of California to cause cancer and birth defects or other reproductive harm. 

For more information go to www.P65Warnings.ca.gov.

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