5
MAINTENANCE MANUAL MODELS 825Y, 825YA, 825, 825D, 825YD & 826YD
1. If the unit is installed where vandalism may be a problem, the
assembly should be protected and secured. On 3/4–2" units
the handles of shutoff valves can be removed to discourage
tampering. On 2
1
/
2
–10" units a chain can be looped between
shutoffs and locked in position to prevent tampering with
shutoff valves. Test cock handles can also be removed. On
backflow prevention assemblies installed in conjunction with
fire sprinkler systems, an alarm can be placed on the OS&Y
shut-off valves that will sound if unauthorized closure should
occur.
2. A protective cage can be installed over the unit to discourage
vandals. If a cage is used, it should be installed so that ade-
quate clearance is available for maintenance and testing or it
should be completely removable. Also allow for any discharge
from the relief valve to fully drain from the protective cage.
3. Some units include screw driver adjusted test cocks for vandal
resistance.
Vandalism Protection Procedure
