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Tighten plastic stem nut to fully closed position and then 

loosen slightly using tools to allow for free rotation

Strut Nut 

without insert

Strut Nut  

with insert

Step 1-1:

Rotate lock nut counter 

clockwise until reaches 

the fully extended 

position on both sides

to enable/free CADDY 

ROD LOCK Mechanism

Step 1-2: Hand tighten the plastic 

stem nut to the bottom housing.

Push CADDY ROD LOCK to engage threaded rods

Threaded rod

Threaded rod

Step 4-3 (Optional): Tighten the top stem nut an additional 1/2 turn 

clockwise with 5/8" [16mm] wrench.  Hold the bottom housing with 

15/16" [24mm] wrench during tightening. 

Step 4-2:

Rotate the hex housing to finely tune the strut height

Clockwise = Adjust assembly down

Counter-clockwise = Adjust assembly up

Step 4-1:

Tighten lock nut 

on both sides

Step 1

Install CADDY  ROD LOCK Strut Nut on to strut

Step 3

Step 4

Step 2

Note:   Once Step 2 has been completed, the top and bottom parts are tightly held together, which enables 

the assembly to spin/slide in the slot without disassembling during transportation. This will preserve the ability of 

fine height adjustment in the field.  

TECHNICAL SUPPORT:

www.erico.pentair.com

CFS500_D

INSTRUCTION SHEET

2 OF 2

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Pentair, CADDY, ERICO CADWELD, ERICO CRITEC, ERICO, ERIFLEX, and LENTON are owned by Pentair or its global affiliates. All other trademarks

are the property of their respective owners. Pentair reserves the right to change specifications without prior notice.

CADDY ROD LOCK Strut Nut

3/8", M8, M10

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