SETTING PROCEDURE
Steps 1 through 10 are to be performed when initially fill-
ing the fire sprinkler and domestic system piping with
water or after a fire sprinkler operation (Ref. Figure 2).
1. Close the Main Control Valve.
2. Close the Domestic Control Valve, and all water outlets
in the domestic piping system.
3. Close all drain valves in addition to the Drain and Flow
Test Connection in the fire sprinkler system, and replace
all operated sprinklers as necessary.
4. Partially open the Main Control Valve until the sound of
flowing water just begins, and then leave the Main Con-
trol Valve in the partially open position.
5. After the fire sprinkler system pressure gauge indicates
approximately the same pressure as the supply pres-
sure gauge, fully open the Main Control Valve.
6. Open the Inspector’s Test Connection. After trapped air
has been relieved, close the Inspector’s Test Connec-
tion.
7. Open the highest elevation outlet on the domestic sys-
tem.
8. Partially open the Domestic Control Valve until the
sound of flowing water begins. Allow the domestic pip-
ing to slowly fill with water.
9. Close the highest elevation water outlet on the domestic
system when unaerated water begins to flow.
10. Completely open the Domestic Control Valve, and then
check that the domestic system is properly pressurized
by verifying that at least three water outlets in the do-
mestic system can flow full at the same time.
If the water outlets flow full, the S370 Valve is set and
ready for service and the water outlets on the domestic
system may be closed.
If the water outlets do not flow full, reclose the Domestic
Control Valve, wait a minimum of ten seconds, and en-
sure that there is no flow from the fire sprinkler system
piping. Reopen the Domestic Control Valve and then re-
check that the water outlets are flowing full.
MAINTENANCE AND SERVICE
The Model S370 Automatic Residential Domestic Shutoff
Valve does not require any regularly scheduled mainte-
nance. However, proper operation of the S370 Valve
should be verified at least annually (preferably quarterly)
during system alarm inspections. Any impairment must
be immediately corrected.
It is also recommended that fire protection systems be in-
spected by a qualified Inspection Service.
NOTES
No attempt is to be made to repair any S370 Valve com-
ponent in the field.
The operational test and flow test procedures will result in
operation of the associated alarms, as well as an interrup-
tion of the domestic water supply service. Consequently,
notification must be given to the owner and the fire depart-
STAR SPRINKLER INC.
Page 4
2-7.1.10
FIGURE 4
NOMINAL PRESSURE LOSS VERSUS FLOW
FLOW RATE IN GALLONS PER MINUTE (GPM)
FIRE
SPRINKLER
PORT
DOM
EST
IC
PORT
10
5
20
30
40
70
100
150
IN
POUNDS
PER
SQUARE
INCH
(PSI)
NOM
INAL
PRESSURE
DROP
1.0
2.0
3.0
OBSOLETE
