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Form No. FX_012798 18.12.04 Rev 18.1
© 2018 | Minimax Fire Protection | 321 Industrial Park Dr. | Hastings, MI 49058 | www.minimax-fire.com
4. INSTALLATION
Installing the MG-4 or MG-5 Sprinkler Guards
NOTICE
The MG-4 and MG-5 Sprinkler Guards are NOT designed to be used on sidewall sprinklers, or sprinklers installed in recessed escutcheons.
Refer to the appropriate sprinkler Technical Data Page for warnings and additional installation instructions. Then install units
according to the following steps.
The Model MG-4 or MG-5 Sprinkler Guards can be retrofitted onto sprinklers that have already been installed on the system.
However, it is recommended to install the guard onto the sprinkler prior to installing the sprinkler on the system and prior to
applying any pipe-joint compound or tape to the external threads of the sprinkler. Consider ordering the guard factory installed on
the sprinkler used.
1. Loosen the screws in the brackets at the base of the sprinkler guard.
2. Spread and hold the two bracket halves (at the base of the sprinkler guard) apart just enough to place the guard over the
deflector and wrench boss of the sprinkler.
3. With the sprinkler inside the sprinkler guard, position the guard so the two halves of the bracket grip the sprinkler just below
the wrench boss, but above the threads.
NOTICE
Orient the sprinkler guard so the screw openings in the base of the guard are located at the ends of the sprinkler wrench boss
(where the sprinkler frame arms contact the wrench boss). See Figure 1.
4. Thread both screws into the openings provided in the opposite bracket half and tighten to secure the base of the guard to
the sprinkler.
5. Apply a small amount of pipe-joint compound or tape to the external threads only, taking care not to allow a build-up of
compound in the sprinkler orifice.
6. Install the sprinkler on the piping using the special sprinkler wrench. DO NOT use the guard to start or thread the sprinkler
into the fitting.
Installing the Dry Sprinkler Guard:
Dry sprinklers must be installed on the system prior to installing the guard onto the dry sprinklers.
NOTE:
When installing the Dry Sprinkler Guard on recessed Dry Pendent, the Recessed Escutcheon Cup must be removed and the
sprinkler centered in a minimum 2-1/8” (54 mm) diameter hole prior to installation of the Dry Sprinkler Guard.
1. Remove the retaining ring from the Dry Sprinkler Guard.
2. Spread and hold the two “C” shaped halves of the bracket (at the base of the guard) apart just enough to place the guard
over the deflector and wrench boss of the sprinkler.
3. With the sprinkler inside the guard, position the guard so the “C” shaped bracket halves of the guard grip the sprinkler in
the slot provided just below the wrench boss.
NOTICE
Orient the sprinkler guard so two of the four guard wires align with the frame arms of the sprinkler. See Figure 2.
4. Push the retaining ring over the guard toward the base of the sprinkler until the ring snaps firmly into the depression
provided on each of the four wire members of the guard.
5. For recessed dry pendent sprinklers, re-install the Minimax Fire Protection recessed escutcheon cup.
Figure 1 - Model MG-4 Sprinkler Guard Installed on Sprinklers
Figure 2 - Dry Sprinkler Guard
Installed on Sprinkler
