Product Overview

Description
The Caleffi NA553 Boiler Trim Kit is available in 12 configurations
and combines 8 boiler installation components into one
box. This kit matches the necessary components for boiler
installations into a simple package.
The NA553 takes all the guess work out of selecting
components for a simple installation.
The kit includes:
-1 Caleffi DISCAL
®
air separator
-1 Backflow preventer (R=ASSE 1013,
otherwise ASSE 1012)
-1 AutoFill™
-1 Expansion tank check valve
-2 Brass nipples
-1 Brass tee
Boiler trim kits
NA553 series
Product Information - PI 101 - Issue date 12/2018
Kit code number NA553369 NA553379 NA553369R NA553379R
DISCAL
®
551028A
1” sweat
551035A
1¼” sweat
551028A
1” sweat
551035A
1¼” sweat
AutoFill™ /
Backflow combo
573009A
½” sweat
573009A
½” sweat
574002A
½” FNPT
574002A
½” FNPT
Check valve 561402A 561402A 561402A 561402A
Tank 4.4 gallons 4.4 gallons 4.4 gallons 4.4 gallons
Nipples 3” brass 3” brass 3” brass 3” brass
Tee NPT brass NPT brass NPT brass NPT brass
Kit code number NA553362 NA553372 NA553362R NA553372R
DISCAL
®
551006A
1” NPT
551007A
1¼” NPT
551006A
1” NPT
551007A
1¼” NPT
AutoFill™ /
Backflow combo
573002A
½” NPT
573002A
½” NPT
574002A
½” FNPT
574002A
½” FNPT
Check valve 561402A 561402A 561402A 561402A
Tank 4.4 gallons 4.4 gallons 4.4 gallons 4.4 gallons
Nipples 3” brass 3” brass 3” brass 3” brass
Tee NPT brass NPT brass NPT brass NPT brass
Air separator with NPT connections
Kit code number NA553366 NA553376 NA553366R NA553376R
DISCAL
®
551066A
1” press
551067A
1¼” press
551066A
1” press
551067A
1¼” press
AutoFill™ /
Backflow combo
573007A
½” press
573007A
½” press
574002A
½” FNPT
574002A
½” FNPT
Check valve 561402A 561402A 561402A 561402A
Tank 4.4 gallons 4.4 gallons 4.4 gallons 4.4 gallons
Nipples 3” brass 3” brass 3” brass 3” brass
Tee NPT brass NPT brass NPT brass NPT brass
Air separator with Press connections
Air separator with Sweat connections