Tyco RSV-1 User manual

Model RSV-1 Residential Shut-Off Valve,
Dual-Purpose Water Supply,
Domestic and Fire Sprinkler System
Page 1 of 6 MARCH 2022 TFP982
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General
Description
The TYCO Model RSV-1 Residen-
tial Shut-Off Valves are intended for
use in dual-purpose residential water
supply piping that serves both domes-
tic and residential fire protection sprin-
kler system needs. The 1 Inch (DN25)
Valve is intended for NFPA 13D system
needs, whereas the 2 Inch (DN50)
Valve is intended for systems designed
in accordance with either NFPA 13,
13D, or 13R.
When a fire sprinkler operates, the
Model RSV-1 Residential Shut-Off
Valve automatically diverts the avail-
able water supply to the fire sprin-
kler system. Consequently, when the
Model RSV-1 Valve is utilized, the
system designer does not need to
add the domestic flow demand to the
fire sprinkler system flow demand, as
would otherwise be required by NFPA
13D or 13R.
Consider use of the Model RSV-1 Res-
idential Shut-Off Valve when either
the water supply cannot adequately
provide for both the domestic design
demand and the fire sprinkler flow
demand, or it is necessary to increase
the effectiveness of the fire sprinkler
system by automatically diverting the
domestic flow.
The Model RSV-1 Residential Shut-
Off Valve maximizes the effective use
of an existing water supply. There-
fore, in areas with limited water sup-
plies, it may eliminate the need to add
costly pumps, pressurized reservoirs,
or electrically operated domestic shut-
off valves. The Model RSV-1 Valve has
a built-in check valve in the fire sprin-
kler system outlet that eliminates the
need for a separate check valve. Also,
the Model RSV-1 Valve automatically
resets, thereby eliminating the need for
valve disassembly after a fire sprinkler
system test or operation.
NOTICE
The Model RSV-1 Residential Shut-
Off Valves described herein must be
installed and maintained in compliance
with this document, as well as with the
applicable standards of the National
Fire Protection Association, in addi-
tion to the standards of any authorities
having jurisdiction. Failure to do so may
impair the integrity of this device.
The owner is responsible for main-
taining their fire protection system
and devices in proper operating con-
dition. Contact the installing contrac-
tor or product manufacturer with any
questions.
Technical
Data
Approvals
UL and C-UL Listed
Certified to all requirements of
NSF/ANSI 61, Annex G and NSF/ANSI 372
Notes:
The 1 Inch (DN25) Model RSV-1 Resi-
dential Shut-Off Valve is suitable for use
in water supply arrangements for resi-
dential fire sprinkler systems designed
per NFPA 13D.
The 2 Inch (DN50) Model RSV-1 Resi-
dential Shut-Off Valve is suitable for use
in water supply arrangements for resi-
dential fire sprinkler systems designed
per NFPA 13, 13D, or 13R.
Maximum Pressure
175 psi (12,1 bar)
Weight
1 Inch (DN25): 11 lbs. (5 kg)
2 Inch (DN50): 29 lbs. (11 kg)
Pressure Loss
Refer to Graphs A and B
Patents
2 Inch (DN50) Model RSV-1 Valve
Patent Pending

TFP982
Page 2 of 6
2 Inch (DN50) Valve
In order for the 2 Inch (DN50) Model
RSV-1 Valve to operate automatically
at sprinkler activation, the fire sprin-
kler system from the water supply
main to the most hydraulically remote
sprinkler must be designed to provide
a minimum single sprinkler flow of 8
GPM (30,5 LPM) when the water supply
pressure at the water supply main is at
its minimum expected value.
The minimum single sprinkler flow rate
of 8 GPM (30,5 LPM), required for use
with the 2 Inch (DN50) Model RSV-1
Valve, does not take precedence over
any more hydraulically demanding
single sprinkler flow rate specified for
the residential sprinklers in use.
Operating
Principles
When a fire sprinkler activates during
domestic usage, the TYCO Model
RSV-1 Residential Shut-Off Valve auto-
matically diverts flow to the domestic
system and diverts the available water
supply to the fire sprinkler system,
thereby eliminating a reduced flow con-
dition in the sprinkler system that might
otherwise be caused by possible sig-
nificant domestic water usage.
When the Model RSV-1 Valve is in the
normal standby position as shown in
Figures 4 and 5, the Piston Assembly,
assisted by its Spring, is in the down
position. With the Piston Assembly in
the down position, the Fire Sprinkler
Seal permits the Model RSV-1 Valve
to perform as a conventional check
valve. Also, with the Piston Assembly
in the down position, water is available
on demand through the Domestic Flow
Passage and out the Domestic Port.
Upon operation and with a minimum
design water flow (e.g., 12.5 GPM (47,3
LPM) for the 1 inch Valve or 8 GPM
(30,5 LPM) for the 2 Inch Valve) to
the automatic residential fire sprinkler
system, the Piston Assembly moves
upward. With the Piston Assembly in
the up position, any water flow to the
Domestic Port is diverted to the Fire
Sprinkler Port.
The contours of the Piston Assembly
are specifically configured to minimize
its upward movement except under the
level of sustained fire sprinkler system
flow resulting from operation of one or
more fire sprinklers. However, because
most fire sprinkler systems contain air
pockets, the Piston Assembly tends to
move momentarily upward when there
is a surge in supply pressure.
Physical Characteristics
1 Inch (DN25) Valve
Body ...................... Stainless Steel
Top and Bottom Cover . . . . . . . . Stainless Steel
Upper Cap. . . . . . . . . . . . . . . . . . Stainless Steel
Bottom Seal . . . . . . . . . . . . . . . . Stainless Steel
Piston . . . . . . . . . . . . . . . . . . . . . . . . . . . Plastic*
Differential Ring . . . . . . . . . . . . . . . . . . . Plastic*
Sleeve . . . . . . . . . . . . . . . . . . . . . . . . . . . Plastic*
Upper and Lower Seals . . . . . . . . . . . . . . EPDM
O-Rings. . . . . . . . . . . . . . . . . . . . . . . . . . Buna-N
Piston Spring . . . . . . . . . . . . . . . Stainless Steel
Piston Screws . . . . . . . . . . . . . . . Stainless Steel
Cap Screw. . . . . . . . . . . . . . . . . . Stainless Steel
2 Inch (DN50) Valve
Body and Cover . . . . . . . . . . . . . Stainless Steel
Piston Insert . . . . . . . . . . . . . . . . Stainless Steel
Bottom Seal . . . . . . . . . . . . . . . . Stainless Steel
Piston Cover . . . . . . . . . . . . . . . . . . . . . . Plastic*
Insert Sleeve . . . . . . . . . . . . . . . . . . . . . . Plastic*
Piston Seal . . . . . . . . . . . . . . . . . . . . . . . . EPDM
O-Rings. . . . . . . . . . . . . . . . . . . . . . . . . . . EPDM
Piston Spring . . . . . . . . . . . . . . . Stainless Steel
Piston Nut . . . . . . . . . . . . . . . . . . Stainless Steel
Retainer Ring . . . . . . . . . . . . . . . Stainless Steel
*Glass Reinforced Polyphenylene Oxide
Design Criteria
The TYCO Model RSV-1 Residential
Shut-Off Valve must be installed ver-
tically with the Water Supply Port at
the bottom, the Fire Sprinkler Port at
the top, and the Domestic Port at the
side (Ref. Figures 4 and 5). Figure 1
shows the typical installation arrange-
ment. Refer to the Installation section
for additional design considerations.
Water Supply Requirements
1 Inch (DN25) Valve
In order for the 1 Inch (DN25) Model
RSV-1 Valve to operate automati-
cally upon sprinkler operation, the fire
sprinkler system from the water main
to the most hydraulically remote sprin-
kler must be designed to provide a
minimum single sprinkler flow of 12.5
GPM (47,3 LPM) when the supply
pressure at the main is at its minimum
expected value.
The minimum single sprinkler flow
rate of 12.5 GPM (47,3 LPM), required
for use with the 1 Inch (DN25) Model
RSV-1 Valve, does not take precedence
over any more hydraulically demanding
single sprinkler flow rate specified for
the residential sprinklers in use.
When performing hydraulic design cal-
culations for the fire sprinkler system,
you need not account for the trickle
flow through the 1 Inch (DN25) Model
RSV-1 Valve By-Pass Restriction into
the domestic system.
For the 1 Inch (DN25) Model RSV-1
Valve, the maximum water supply
service line is 1 inch (DN25).
FIRE SPRINKLER
SYSTEM PRESSURE
GAUGE
WATERFLOW
DETECTOR
(FIRE ALARM)
MODEL RSV-1
RESIDENTIAL
SHUT-OFF VALVE
(AUTOMATIC)
WATER
METER
MAIN
CONTROL
VALVE
WATER
SUPPLY
WATER
SUPPLY
GATE
VALVE
BACKFLOW PREVENTER AS
REQUIRED BY AUTHORITY
HAVING JURISDICTION
AUTOMATIC FIRE SPRINKLERS
TO DOMESTIC
SYSTEM
SUPPLY
PRESSURE
GAUGE
DOMESTIC
CONTROL
VALVE
DRAIN AND FLOW
TEST CONNECTION
ALARM TEST
CONNECTION
WATER SUPPLY
MAIN
FIGURE 1
MODEL RSV-1 RESIDENTIAL SHUT-OFF VALVE
TYPICAL INSTALLATION ARRANGEMENT

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Page 3 of 6
The momentary opening and re-clos-
ing of the Piston Assembly at the Fire
Sprinkler Line Seal traps a portion
of the pressure increase within the
fire sprinkler system. Trapped pres-
sure increases within the fire sprinkler
system help to prevent a subsequent
surge in the supply pressure from
causing the water-flow detector to
signal a false alarm.
As indicated above, domestic system
usage can reduce the pressure avail-
able to the fire sprinkler system.
However, when utilizing the Model
RSV-1 Valve, you do not need to include
additional hydraulic flow of the domes-
tic system, when otherwise required by
NFPA standards (NFPA 13D or 13R), to
determine the minimum possible resid-
ual (flowing) pressure available to the
fire sprinkler system.
For operation of the Model RSV-1 Resi-
dential Shut-Off Valve, you need only
design the fire sprinkler system from
the water supply main to the most
hydraulically remote sprinkler. Domes-
tic flow does not require consideration.
As long as the single sprinkler flow is
equal to or greater than 12.5 GPM (47,3
LPM) for the 1 Inch Valve or 8 GPM
(30,5 LPM) for the 2 Inch Valve when
the supply pressure at the main is at
its minimum expected value, the Model
RSV-1 Valve automatically diverts the
domestic flow.
After the Piston Assembly has moved
to the full up position, only a small
amount of water is permitted to trickle
through the Internal By-Pass Restric-
tion to the Domestic Port (Ref. Figures
4 and 5). The trickle flow through the
Internal By-Pass Restriction permits
the Model RSV-1 Valve to reset auto-
matically after a sprinkler operation or
test without draining the fire sprinkler
system.
When the Domestic Control Valve is
closed, the Internal By-Pass Restriction
allows the Supply and Domestic Port
pressures to equalize and the Piston
Assembly to move back down to the
standby position.
When using the 1 inch RSV-1, the
maximum flow rate through the Internal
By-Pass Restriction, when the Model
RSV-1 Valve is in the operated position,
is no greater than 0.25 GPM (0,9 LPM)
for a typical residual (flowing) pressure
of 40 psi (2,8 bar) at the inlet. Conse-
quently, when performing hydraulic
design calculations for the fire sprinkler
system, you do not need to consider
trickle flow through the Model RSV-1
Valve Internal By-Pass Restriction into
the domestic system.
When using the 2 inch RSV-1, the
maximum flow rate through the Internal
By-Pass Restriction, when the Model
RSV-1 Valve is in the operated position,
is no greater than 1.5 GPM (5,7 LPM)
for a typical residual (flowing) pressure
of 40 psi (2,8 bar) at the inlet. Conse-
quently, when performing hydraulic
design calculations for the fire sprin-
kler system, a 1.5 GPM (5,7 LPM) flow
demand is required to be added at
the RSV-1 and calculated back to the
source.
Components:
-
2
Body1 -
4
9
12
13
1
7
8
6
3
2
5
8-3/16"
(208,0 mm)
4-15/16"
(125,4 mm)
3-1/4"
(82,6 mm)
2-3/8"
(60,3 mm)
WATER
SUPPLY
PORT, 1" NPT
3-5/8" DIA.
(92,1 mm)
FIRE
SPRINKLER
PORT, 1" NPT
DOMESTIC
PORT,
1" NPT
11
14
15
10
5
Top Cover
Screw,
Upper Cap
3-
Upper Cap
-
4
O-Ring,
Cover (2)
5-
Upper Seal6 -
O-Ring,
Upper Sleeve
7-
Sleeve8 -
Spring9 -
Differential
Ring
10
-
Lower Seal
11
-
Screw,
Piston (4)
12
-
Bottom Cover
13
-
Piston
-
14
O-Ring,
Lower Sleeve
15
-
Components:
4-1/2"
(114,3 mm)
4-9/16"
(115,9 mm)
5-3/8" DIA.
(136,5 mm)
3-3/4"
(95,3 mm)
9-1/16"
(230,2 mm)
FIRE
SPRINKLER
PORT, 2" NPT
DOMESTIC
PORT,
2" NPT
WATER
SUPPLY
PORT, 2" NPT
-
2 Insert Sleeve
Cover O-Ring
Insert Sleeve
O-Ring (2)
Piston Seal
Bottom Seal
-
8
-
4
7-
3-
Body1 -
Piston Nut
Piston Spring
-
6
5-
Piston Cover
Piston Insert
Cover
Retainer Ring
9-
10 -
11 -
12 -
-
13 Bottom Seal
O-Ring
3
7
9
4
2
9
11
10
6
5
1
12
8
13
FIGURE 2
1 INCH (DN25) MODEL RSV-1 RESIDENTIAL SHUT-OFF VALVE
ASSEMBLY AND DIMENSIONS
FIGURE 3
2 INCH (DN50) MODEL RSV-1 RESIDENTIAL SHUT-OFF VALVE
ASSEMBLY AND DIMENSIONS

TFP982
Page 4 of 6
Installation
Figure 1 illustrates a typical installation
arrangement using the TYCO Model
RSV-1 Residential Shut-Off Valve. The
arrangement may need to be modified
to meet the requirements of the author-
ity having jurisdiction. However, the
Model RSV-1 Valve must be installed
in accordance with this section.
General Instructions
A fire sprinkler water supply connec-
tion to a public water supply is usually
subject to local regulations concern-
ing metering and backflow prevention
requirements. Consult with the local
water authorities concerning local
requirements that may apply to the
arrangement of these components in
the fire sprinkler system water supply.
For the 1 Inch (DN25) Valve, the
maximum water supply service line is
1 Inch (DN25).
Step 1. Ensure that the water supply
to the Model RSV-1 Valve is free of
contaminants and particles of a size
greater than 1/8 inch (3,2 mm).
Step 2. Install the Model RSV-1 Valve
vertically with the Supply Port at the
bottom, the Fire Sprinkler Port at the
top, and the Domestic Port at the side.
Ensure that the arrows cast on the
Body point in the direction of flow.
A suitable clamp along the water
supply riser piping is recommended to
provide support for the weight of the
Model RSV-1 Valve.
Step 3. Place a Domestic Control Valve
between the Model RSV-1 Valve and
the domestic system. Position the inlet
to the Domestic Control Valve within
12 inches of the Domestic Port of the
Model RSV-1 Valve.
Step 4. The Drain and Flow Test Con-
nection (Ref. Figure 1) is recommended
to be a minimum 1/2 inch (DN15) size
for systems per NFPA 13D, and it must
be a minimum 1 inch (DN25) size for
systems per NFPA 13R.
Step 5. Install an Alarm Test Connec-
tion with a test orifice equal to or less
than the smallest K-factor sprinkler in
the system downstream of the Water-
flow Detector.
Step 6. Apply pipe-thread sealant spar-
ingly only to the male pipe threads that
are to be assembled to the three ports
of the Model RSV-1 Valve. The use of
a non-hardening pipe-thread sealant
such as TEFLON is recommended.
FLOW RATE IN GALLONS PER MINUTE (GPM)
2.0
0.4
0.1
0.2
0.3
0.6
0.5
0.8
1.0
3.0
4.0
6.0
5.0
5 6 108 20 30 40 50
NOMINAL PRESSURE DROP
IN POUNDS PER SQUARE INCH (PSI)
0,04
0,03
0,02
0,01
0,30
0,20
0,08
0,10
0,06
0,05
0,40
NOMINAL PRESSURE DROP IN BAR
(1 PSI = 0,06895 BAR)
20 4030 60 8050 100
FLOW RATE IN LITERS PER MINUTE (LPM)
(1 GPM = 3,785 LPM)
DOMESTIC PORT
FIRE SPRINKLER PORT
200
FLOW RATE IN GALLONS PER MINUTE (GPM)
0.6
0.9
1.0
0.7
0.8
3.0
4.0
5.0
2.0
6050 80 100 200
10.0
9.0
8.0
7.0
6.0
0,09
0,08
0,10
0,07
0,05
0,06
0,20
0,30
0,60
0,40
0,50
200 500400300 700 900
DOMESTIC PORT
FIRE SPRINKLER PORT
FLOW RATE IN LITERS PER MINUTE (LPM)
(1 GPM = 3,785 LPM)
NOMINAL PRESSURE DROP
IN POUNDS PER SQUARE INCH (PSI)
NOMINAL PRESSURE DROP IN BAR
(1 PSI = 0,06895 BAR)
GRAPH A
1 INCH (DN25) MODEL RSV-1 VALVE
RESIDENTIAL SHUT-OFF VALVE
NOMINAL PRESSURE LOSS VS. FLOW
GRAPH B
2 INCH (DN50) MODEL RSV-1 VALVE
RESIDENTIAL SHUT-OFF VALVE
NOMINAL PRESSURE LOSS VERSUS FLOW

TFP982
Page 5 of 6
SUPPLYSUPPLY
TO
DOMESTIC
TO FIRE
SPRINKLERS
OPERATEDSTANDBY
FIRE
SPRINKLER
FLOW
PASSAGE
SUPPLY
PORT
FIRE
SPRINKLER
PORT
DOMESTIC
PORT
FIRE
SPRINKLER
SEAT
SUPPLY
PORT
FIRE
SPRINKLER
SEAT
DOMESTIC
PORT
FIRE
SPRINKLER
PORT
PISTON
ASSEMBLY
DOMESTIC
SEAT
INTERNAL
BY-PASS
RESTRICTION
PISTON
ASSEMBLY
DOMESTIC
FLOW
PASSAGE
DOMESTIC
SEAT
OPERATEDSTANDBY
SUPPLYSUPPLY
TO FIRE
SPRINKLERS
TO
DOMESTIC
FIRE
SPRINKLER
FLOW
PASSAGE
SUPPLY
PORT
FIRE
SPRINKLER
PORT
DOMESTIC
PORT
FIRE
SPRINKLER
SEAT
SUPPLY
PORT
FIRE
SPRINKLER
SEAT
DOMESTIC
PORT
FIRE
SPRINKLER
PORT
PISTON
ASSEMBLY
DOMESTIC
SEAT
INTERNAL
BY-PASS
RESTRICTION
PISTON
ASSEMBLY
DOMESTIC
FLOW
PASSAGE
DOMESTIC
SEAT
FIGURE 4
1 INCH (DN25) MODEL RSV-1 RESIDENTIAL SHUT-OFF VALVE
STANDBY AND OPERATED CONDITIONS
FIGURE 5
2 INCH (DN50) MODEL RSV-1 VALVE RESIDENTIAL SHUT-OFF VALVE
STANDBY AND OPERATED CONDITIONS

TFP982
Page 6 of 6
NATIONAL FIRE PROTECTION ASSOCIATION and NFPA are registered trademarks of National Fire Protection Association;
TEFLON is a trademark of The Chemours Company FC, LLC
1400 Pennbrook Parkway, Lansdale, PA 19446 | Telephone [phone]
© 2022 Johnson Controls. All rights reserved. All specifications and other information shown were current as of document revision date and are subject to change without notice.
Valve Setting
Procedure
Perform steps 1 through 9 when initially
filling the fire sprinkler and domestic
system piping with water or after a fire
sprinkler operation (Ref. Figure 1).
Step 1. Close the Main Control Valve.
Step 2. Close the Domestic Control
Valve and all water outlets in the
domestic piping system.
Step 3. In addition to the Drain and
Flow Test Connection in the fire sprin-
kler system, close all drain valves and
replace all operated sprinklers as
necessary.
Step 4. Partially open the Main Control
Valve until the sound of flowing water
just begins, then leave the Main Control
Valve in the partially open position.
Step 5. After the fire sprinkler system
pressure gauge indicates approxi-
mately the same pressure as the supply
pressure gauge, fully open the Main
Control Valve.
Step 6. Open the highest elevation
outlet on the domestic system.
Step 7. Partially open the Domestic
Control Valve until the sound of flowing
water begins. Allow the domestic
piping to fill slowly with water.
Step 8. Close the highest elevation
water outlet on the domestic system
when unaerated water begins to flow.
Step 9. Completely open the Domes-
tic Control Valve, then check that the
domestic system is properly pressur-
ized by verifying that at least three
water outlets in the domestic system
can flow full at the same time.
• If the water outlets ow fully, the
Model RSV-1 Valve is set and ready
for service. Close the water outlets
on the domestic system.
• If the water outlets do not ow
fully, re-close the Domestic
Control Valve, wait a minimum
of ten seconds, and ensure that
there is no ow from the re
sprinkler system piping. Reopen
the Domestic Control Valve, then
recheck that the water outlets are
owing fully.
Care and
Maintenance
The following inspection procedure
for the TYCO Model RSV-1 Residen-
tial Shut-Off Valve must be performed
as indicated, in addition to any specific
requirements of the NFPA. Any impair-
ment must be immediately corrected.
Before closing a fire protection system
control valve for inspection or main-
tenance work on the fire protection
system that it controls, obtain per-
mission to shut down the affected fire
protection system from the proper
authorities and notify all personnel who
may be affected by this action.
Make no attempt to repair any Model
RSV-1 Valve component in the field.
The Model RSV-1 Valve is not field-
repairable. If malfunction occurs, the
entire unit must be replaced.
The operational test and flow test pro-
cedures result in operation of the asso-
ciated alarms, as well as an interruption
of the domestic water supply service.
You must notify the owner, building
occupants, and the fire department,
central station, or other signal station
to which the alarms are connected.
After placing a fire protection system
in service, notify the proper authorities
and advise those responsible for moni-
toring proprietary and/or central station
alarms.
The owner is responsible for the
inspection, testing, and maintenance of
their fire protection system and devices
in compliance with this document, as
well as with the applicable standards
of the National Fire Protection Associa-
tion (e.g., NFPA 25), in addition to the
standards of any authority having juris-
diction. Contact the installing contrac-
tor or product manufacturer regarding
any questions.
Automatic sprinkler systems should be
inspected, tested, and maintained by a
qualified Inspection Service in accor-
dance with local requirements and/or
national codes and standards.
Operation Test Procedure
Step 1. Fully open two or three water
outlets in the domestic piping system.
Step 2. To simulate a sprinkler opera-
tion, open the Alarm Test Connection
of the fire sprinkler system.
Step 3. Verify that any alarms are oper-
ating and that the flow from the domes-
tic water outlets decreases to no more
than a trickle.
Step 4. Reset the Model RSV-1 Valve
in accordance with the Valve Setting
Procedure described in this data sheet.
Flow Test Procedure
Step A. While there is no water
flowing in the domestic system, com-
pletely open the Drain and Flow Test
Connection.
Step B. While water is flowing, record
the pressure reading on the fire sprin-
kler system pressure gauge and then
compare this reading to previous
readings.
If there is a significant decrease in pres-
sure since the last time the pressure
reading was taken and this decrease
is not due to a normally expected drop
in the water supply pressure, an impair-
ment may exist that should be immedi-
ately identified and corrected.
Step C. Close the Drain and Flow Test
Connection to allow the Model RSV-1
Valve to reset automatically. Automatic
resetting occurs within ten seconds.
Step D. After waiting ten seconds, com-
pletely open at least three water outlets
in the domestic system and allow these
outlets to flow simultaneously.
If the water outlets flow fully, the
Model RSV-1 Valve is set and ready for
service. Close the water outlets on the
domestic system.
If the water outlets do not flow fully,
close the Domestic Control Valve and
verify that there is no flow from the fire
sprinkler system piping, such as at
the Inspector’s Test Connection. Wait
a minimum of ten seconds. Re-open
the Domestic Control Valve and then
recheck that the domestic system
water outlets are flowing full.
Limited
Warranty
For warranty terms and conditions, visit
www.tyco-fire.com.
Ordering
Procedure
Contact your local distributor for avail-
ability. When placing an order, indicate
the full product name and Part Number
(P/N).
Valves with NPT Connections
Specify: 1 Inch NPT (DN25) Model
RSV-1 Residential Shut-Off Valve,
P/N 52-540-1-011
Specify: 2 Inch NPT (DN50) Model
RSV-1 Residential Shut-Off Valve,
P/N 52-540-1-012