Install Instructions

RAPID INSPECTION PROCEDURE
DEFECT DETECTED
CAUSE
REQUIRED ACTION
OPERATION
Close downstream
shut-off valve
-Permanent leakage
-No leakage
Upstream valve or
discharge valve
leaking
Dismantle and
inspect
Close upstream
shut-off valve and
open upstream
pressure control cock
-Discharge does not
open. Leakage is
minimal and lasts
more than 1 minutes.
-Discharge opens
abruptly, emptying in
less than 1 minute.
Discharge blocked
Dismantle and
inspect
Open downstream
shut-off valve
-Continuous discharge
-No discharge
Downstream valve
leaking
Dismantle and
inspect. Put back
into operation.
7