Sioux Chief 525-P2M LockBlock Face Plate User Manual
Stub out bracket
 
STUB OUT BRACKET
525-P2M
SPECIFICATION
Sioux Chief’s LockBlock Face Plate is designed support ½" or ¾" CTS tube
when penetrating a wall or floor. The plate is used in conjunction with either 
the LockBlock or PEX Bend Support compression devices from Sioux Chief. 
Compression devices shall be compatible with copper, PEX or CPVC tube. The face 
plate shall be made from 20-gauge, corrosion resistant galvanized steel. Design 
shall include alternating holes around the perimeter of the plate allowing installer 
to use self-tapping screws when securing to metal stud or metal bracket. Design 
shall include a formed rib to provide additional strength once plate is mounted. The 
face plate shall include a large center hole that allows CTS tube to pass through 
the hole and penetrate the wall or floor. Minimally, there shall be two smaller holes 
located near the large center hole, that align with and are used to secure either 
LockBlock or PEX Bend Support compression devices. Screws pass through the 
face plate and penetrate into plastic compression device on the backside of plate. 
The LockBlock Face Plate may be used in new construction or retrofit/re-piping jobs.
INSTALLATION
Using two #6 × 1" coarse thread, corrosion resistant screws (provided with 
compression devices), loosely mount the LockBlock or PEX Bend Support 
compression device to back side of the plate. Using at least two additional 
common screws or nails, secure the face plate to vertical stud, wood sub floor or 
preexisting horizontal brace located between the vertical studs. Insert ½" or ¾" 
CTS tube into the back of the LockBlock, penetrating through the center hole of the 
plate. If using the PEX Bend Support, insert ½" PEX tubing through the back of the 
blocks penetrating through the center hole of the plate. Bend the PEX tubing until 
it locks into the end of the plastic elbow. Securely tighten the screws penetrating 
through the front of the plate and through the plastic LockBlock or PEX Bend 
Support to complete installation.
MATERIALS
20-gauge galvanized steel
SAFE WORKING LOAD
25 lbs.
DIMENSIONS
A:
height
3.450"
B: width
4.200"
C: center hole
1.125" diameter
D: large outer hole
0.190" diameter
E: small outer hole
0.100" diameter
F:
LockBlock mounting hole
0.160" diameter
G: PBS mounting hole
0.190" diameter
H: center hole to horizontal outer hole distance
1.505" on-center
I:
center hole to vertical outer hole distance
1.880" on-center
J:
LockBlock mounting hole distance
1.375" on-center
K: PBS mounting hole distance
1.630" on-center
525-P2M
LockBlock Face Plate
™
Item Number
525-P2M
Made in USA
B
I
C
D
E
F
G
A
H
J
K
Sioux Chief Manufacturing Company | P: 1.800.821.3944 | F: 1.800.758.5950 | www.siouxchief.com
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