Cut Sheet

Catalog No./Item Description/Specifications
829CK-1 Cover Plate – Flush brass
communication cover plate
(2 5/8" and 1" diameter trade
size screw plugs) with four
mounting screws.
828SPTC Cover Plate – Flush brass
communication cover plate.
1 1/2" diameter trade size
screw plugs.
437 Attaching Ring – Attaching
Rings for Source I (Preset or
Afterset) zinc die-cast. 4"
[102mm] O.D. Add suffix to
Cat. No. to indicate ring
depth: 7/8", 1 1/8", 1 1/2", 2",
2 3/8", or 3 1/8".
S1MC Mudcap – For Source I 437
Attaching Ring. 4" [102mm] O.D.
S1MC-MS Mudcap – For Source I
Attaching Ring with marker
screw. 4" [102mm] O.D. Use
with 437 Attaching Rings only.
4" [102mm]
Diameter
Catalog No./Item Description/Specifications
439 Attaching Ring – For
polycarbonate afterset use
only. No adjusting ring required.
4" [102mm] O.D. Four #6-32
hold-down screws provided.
897AR Adjusting Ring – Adjusting
ring (with three adjusting
screws) for use with 437
Attaching Rings – power for
brass fitting only. 3 25/32"
[96mm] O.D.
898AR Adjusting Ring – Adjusting ring
(with three adjusting screws)
for use with 437 Attaching
Rings – communication only
(brass and polycarbonate
fittings) and power for
polycarbonate fitting only.
3 25/32" [96mm] O.D.
S1ER Attaching Ring Extension –
Extension ring – mounts on top
of 437 Attaching Ring. Includes
extension ring and three
mounting screws. 4" [102mm]
O.D. Add suffix to indicate ring
height: 7/8", 1 1/8", 1 1/2", 2",
2 3/8", 3 1/8". We recommend
using a shallow Attaching Ring
and deep extension ring
whenever possible.
3
3 1/8"
[80mm]
4 1/8"
[105mm]
3 1/8"
[80mm]
4 1/8"
[106mm]
Source I Series Flush Activations Ordering Information (continued)
4" [102mm] Diameter
4" [102mm]
Diameter
7/8
[22.2mm]
1/2"
[12.7mm]
4" [102mm] Diameter
3 3/4" [95mm] Diameter
3/4"
[19.1mm]
3 3/4" [95mm] Diameter
3/4"
[19.1mm]
S1MC Mudcap
437 Attaching Ring
No. 2 Duct
Carpet Flange S124BLK/BRN
439 Attaching Ring
Duplex Plate with
Membrane S130BLK/BRN
439 Afterset Insert & Polycarbonate Source I Fitting
437 Preset Insert Installation Guidelines
NOTE: 437 Attaching ring can be
used as a preset or afterset.
Drill 2 1/2" [64mm] hole in duct
where activation is desired. Install
attaching ring in hole in raceway
before concrete is poured. Attaching
ring is secured by tightening
locking tabs. Be sure the locking
tabs are oriented lengthwise with
the raceway. The mudcap should
be securely in place before the
concrete pour. After the pour, chip
away concrete and remove mudcap.
Attach 437 Ring, 897/898AR Ring
and Service Fitting (not shown).