ENGLISH INSTRUCTIONS
WATTS
PRESSURE GAUGE
(2 PLACES)
WATTS
SHUTOFF VALVE
(2 PLACES)
WATTS
BACKFLOW
PREVENTER
WATTS
PRESSURE
REGULATOR
(2 PLACES)
WATER
METER
SUPPLY
TO FIXTURES
TO SILLCOCK
IS-25AUB 1734
EDP# 1910200
© 2017 Watts
Limited Warranty:
Watts Regulator Co. (the “Company”) warrants each product to be free from defects
in material
and workmanship
under normal usage
for a
period of one
year from the
date of original ship
-
ment. In the event of such defects within the warranty period, the Company will, at its option, replace or
recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY
GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER
WARRANTIES, EXPRESS OR
IMPLIED. THE
COMPANY HEREBY
SPECIFICALLY DISCLAIMS
ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy
described in
the first
paragraph of
this warranty
shall constitute
the sole
and exclusive
remedy for breach of warranty, and the Company shall not be responsible for any incidental, special
or consequential damages, including without limitation, lost profits or the cost of repairing or replacing
other property which is damaged if this product does not work properly, other costs resulting from labor
charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water
conditions, chemical, or any other circumstances over which the Company has no control. This warranty
shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance
or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow
the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may
not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights
that vary from State to State. You should consult applicable state laws to determine your rights.
SO FAR
AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE
DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL
SHIPMENT.
IS-25AUB 1734
EDP# 1910200
© 2017 Watts
Garantía limitada:
Watts Regulator Co. (en adelante, “la Compañía”) garantiza, por un período de un año a partir
de la
fecha de
embarque original,
que sus
productos están
libres de
defectos en
materiales y mano
de obra
bajo condiciones de uso normal. En caso de que se encuentren tales defectos dentro del período de garantía, la
Compañía reemplazará o reacondicionará, a su elección, el producto sin costo alguno.
LA GARANTÍA AQUÍ ESTIPULADA SE OTORGA EN FORMA EXPRESA Y ES LA ÚNICA GARANTÍA
OTORGADA POR LA COMPAÑÍA EN RELACIÓN CON EL PRODUCTO. LA COMPAÑÍA NO OTORGA NINGUNA
OTRA GARANTÍA, YA SEA EXPRESA O IMPLÍCITA. LA COMPAÑÍA POR LA PRESENTE RENUNCIA
ESPECÍFICAMENTE A TODAS LAS DEMÁS GARANTÍAS, EXPRESAS O IMPLÍCITAS, INCLUYENDO SIN
LIMITACIÓN, LAS GARANTÍAS IMPLÍCITAS DE APTITUD PARA LA COMERCIALIZACIÓN E IDONEIDAD PARA
UN PROPÓSITO EN PARTICULAR.
La solución descrita en el primer párrafo de esta garantía constituirá la única y exclusiva solución por
incumplimiento de garantía, y la Compañía no se hará responsable por daños accidentales, especiales o
indirectos, incluyendo sin limitación, la pérdida de ganancias o el costo de reparación o reemplazo de otra
propiedad que resulte dañada por el mal funcionamiento de este producto, otros costos resultantes por mano
de obra, retardos, vandalismo, negligencia, obstrucciones ocasionadas por materiales extraños, daños debidos
a condiciones adversas del agua, químicos o cualquier otra circunstancia sobre la cual la Compañía no tenga
control. Esta garantía no tendrá validez en cualquier caso de abuso, uso indebido, aplicación incorrecta,
instalación inadecuada, o mantenimiento adecuado o alteración del producto.
Algunos Estados no permiten limitaciones en la duración de una garantía implícita y algunos Estados no permiten
la exclusión
o limitación
de daños
accidentales o
indirectos. Por lo
tanto, es
posible que
las limitaciones anteriores
no sean aplicables en su caso. Esta garantía limitada le da derechos legales específicos; usted podría tener tam-
bién otros derechos que varían según el Estado. Usted debe consultar las leyes estatales aplicables para deter-
minar sus derechos.
EN LA MEDIDA EN QUE SEA CONGRUENTE CON LAS LEYES ESTATALES APLICABLES,
CUALQUIER GARANTÍA IMPLÍCITA QUE NO SEA RECHAZADA, INCLUYENDO LAS GARANTÍAS IMPLÍCITAS DE
APTITUD PARA LA COMERCIALIZACIÓN E IDONEIDAD PARA UN PROPÓSITO EN PARTICULAR, SE LIMITA EN
SU DURACIÓN A UN AÑO A PARTIR DE LA FECHA DEL EMBARQUE ORIGINAL.
Garantie limitée :
Watts Regulator Co. (la « Société ») garantit que chacun de ses produits est exempt de
vice de matériau et de fabrication dans des conditions normales d’utilisation pour une période de un an à
compter de la date d’expédition d’origine. Dans l’éventualité où de tels vices se manifesteraient pendant
la période de garantie, la Société, à sa discrétion, remplacera ou reconditionnera le produit sans frais.
LA PRÉSENTE
GARANTIE EST
EXPRESSE ET
REPRÉSENTE LA
SEULE GARANTIE
OFFERTE PAR
LA SOCIÉTÉ POUR CE PRODUIT. LA SOCIÉTÉ N’OFFRE AUCUNE AUTRE GARANTIE, EXPRESSE OU
TACITE. PAR LA PRÉSENTE, LA SOCIÉTÉ REJETTE SPÉCIFIQUEMENT TOUTE AUTRE GARANTIE,
EXPRESSE OU TACITE, NOTAMMENT TOUTE GARANTIE TACITE DE QUALITÉ MARCHANDE OU
D’ADAPTATION À UN BUT PARTICULIER.
Le recours
décrit dans
le premier
paragraphe de
cette garantie
constitue le
seul recours
à toute
violation
de la présente garantie. La Société ne saurait être tenue responsable de tout dommage accessoire,
spécial ou indirect, y compris, de façon non limitative : la perte de profits ou le coût afférent à la
réparation ou au remplacement d’autres biens qui seraient endommagés par suite du fonctionnement
incorrect dudit produit ; d’autres coûts résultant de frais de main-d’œuvre, de retards, de vandalisme,
de négligence, d’une obstruction causée par des matériaux étrangers, de dommages causés par une
eau impropre, des produits chimiques ou par tout autre événement échappant au contrôle de la Société.
La présente garantie est déclarée nulle et non avenue en cas d’usage abusif ou incorrect, d’application,
d’installation ou d’entretien incorrects ou de modification du produit.
Certains États n’autorisent pas les limitations de durée d’une garantie tacite ou l’exclusion ou la
limitation des dommages accessoires ou indirects. Les limitations susmentionnées peuvent donc ne pas
s’appliquer à vous. Cette garantie
limitée vous donne des
droits spécifiques et il se peut que vous
ayez
aussi d’autres
droits qui
varient d’un
État à
l’autre. Veuillez
vous référer
aux lois
applicables de
l’État pour
déterminer vos droits en
la matière.
DANS LA MESURE PERMISE PAR
LA LOI APPLICABLE DE L’ÉTAT,
TOUTES LES GARANTIES TACITES NE POUVANT PAS ÊTRE REJETÉES, Y COMPRIS LES GARANTIES
TACITES DE QUALITÉ MARCHANDE ET D’ADAPTATION À UN BUT PARTICULIER, SONT LIMITÉES
QUANT À LEUR DURÉE À UN AN À COMPTER DE LA DATE D’EXPÉDITION D’ORIGINE.
1. Mark pipe as shown.
This is pipe insertion depth.
2. Clean pipe end.
1. Remove collet clip.
2. Depress collet.
3. Pull tubing from tailpiece.
3. If using PEX tubing, insert pipe
stiffener (provided) into end of pipe.
4. Push tubing into tailpiece up to mark.
5. Insert collet clip.
Quick-Connect Installation
To Connect:
To Disconnect:
WATTS
PRESSURE GAUGE
(2 PLACES)
WATTS
SHUTOFF VALVE
(2 PLACES)
WATTS
BACKFLOW
PREVENTER
WATTS
PRESSURE
REGULATOR
(2 PLACES)
WATER
METER
SUPPLY
TO FIXTURES
TO SILLCOCK
IS-25AUB 1734
EDP# 1910200
© 2017 Watts
IS-25AUB
LF25AUB-Z3
LF25AUB-DU-QC-Z3
Troubleshooting
High System Pressure
If the downstream system pressure is higher than the set pressure
under no flow conditions, the cause could be thermal expansion,
pressure creep or dirt/debris on the seat.
Thermal expansion occurs whenever water is heated in a closed
system. The system is closed when supply pressure exceeds
150psi, or a check valve or backflow preventer is installed in the
supply piping.
You must make provisions for pressure relief protection of your
plumbing system and components. The use of a relief valve
such as the Watts 530C, BRV, Governor 80, or 3L or potable water
expansion tank such as the Watts DET, PLT or DETA may be required.
To determine if this is the result of thermal expansion, try briefly opening the cold
water tap. If the increased pressure is caused by thermal expansion, the pressure
will immediately be relieved and the system will return to the set pressure. Watts
offers a pressure test gauge, model 276H300 to assist you in determining if you
have high water pressure.
The 276H300 when attached to a hose bibb registers the highest pressure reading
over the period of time it is left on the system.
Maintenance Instructions
• To clean strainer; shut off inlet water pressure, remove strainer plug (2),
remove and clean strainer.
• To replace seat disc; shut off supply, loosen nut (51) and back off adjusting
screw (53) remove spring cage (3), spring (52) and washer (62). Remove
bottom plug (12) and gasket (101). Insert and hold screw driver in slot on top
of stem while loosening seat disc holder (47) from bottom of stem (27).
• To replace diaphragm; loosen lock nut (48) and remove lock washer (46),
diaphragm plate (60) and diaphragm (20).
• When reassembling apply a drop of low strength thread lock to disc holder.
• Open inlet water supply slowly.
Adjustment
Regulator is factory preset to 50psi (344 kPa) in a static condition. To adjust
pressure setting, loosen the lock nut and turn the adjusting bolt clockwise to
increase pressure, counterclockwise to decrease pressure.
Any time a reducing valve is adjusted, use a pressure gauge to verify correct pressure setting.
Do not bottom out adjusting screw on spring cage.
1. The valve should be installed by a
licensed contractor in accordance
with local codes and ordinances.
2. This valve should be installed where
it is accessible with sufficient clear-
ance for cleaning, service, or adjust-
ment.
3. Before installing the valve, be sure
that the pipe ends are reamed and
threads are cut to size. For valves
with Quick-Connect tailpieces refer
to "Quick-Connect Installation"
instructions below.
4. Flush the lines to remove all loose
scale, dirt and other foreign matter
that can damage or clog the valve.
5. Install the regulator with the arrow on
the body pointing in the direction of
the flow.
6. Regulator may be installed vertically
or horizontally (upright or inverted).
7. Start Up — Open cold water supply
then hot water supply. Inspect for
leaks.
NOTICE
To tighten valve, first hand tighten fol-
lowed by
1
⁄
4
-1 turn, using wrench.
The valve should be inspected annually
to assure maximum life and performance.
Product is for interior or exterior applica-
tions. Product should not be buried direct-
ly in the ground. For exterior applications
where the valve will be situated in a vault
or pit or be in contact with the ground, the
valve should be installed in a meter box/
vault, accessible for repair and adjustment,
per local code.
Installation Instructions
Series LF25AUB-Z3
S eries
LF25AUB-Z3
S éries
LF25AUB-Z3
Water Pr
essure Reducing V
alve
Válvula r
eductora de la pr
esión
del agua
Régulateur de pression d'eau
1
⁄
2
" - 2" (15-50mm)
PEX tubing only
Pipe Stiffener
Tail Piece
Repair Kits
†
Kit for Series LF25AUB-Z3 includes all items shown above
ORDERING CODE
KIT NO.
SIZE (DN)
in
mm
0864941
1
⁄
2
" LF25AUB-RK
1
⁄
2
15
0864943
3
⁄
4
" LF25AUB-RK
3
⁄
4
20
0864942
1" LF25AUB-RK
1
25
0864944
1
1
⁄
4
" LF25AUB-RK
1
1
⁄
4
32
0864945
1
1
⁄
2
" LF25AUB-RK
1
1
⁄
2
40
0864946
2" LF25AUB-RK
2
50
When Ordering, Specify:
1. Ordering Code
2. Size of Valve
3. Type Number
4. Model shown on Nameplate
276H300
(53) - Adjusting Screw
(51) - Lock Nut
(3)
- Spring Cage
(61) - Spring Washer
(52) - Spring
(48) - Lock Nut
(46) - Lock Washer
(60) - Diaphragm Plate
(20) - Diaphragm †
(102) - Bypass Valve Gasket*
(116) - Bypass Valve Assembly*
(103) - O-Ring†
(27) - Stem
(16) - Seat†
(42) - Washer
(37) - Disc†
(47) - Disc Holder
(104) - Strainer Plug Gasket†
(2)
- Strainer Plug
(6)
- Bypass Ball**
(77) - Strainer
(101) - Bottom Plug Gasket†
(12) - Bottom Plug
* Bypass Valve Assembly for
1
1
⁄
4
" - 2" is replaceable as
a sub assembly.
(77) - Strainer
(104) -
Strainer Plug Gasket
†
(2) - Strainer Plug
† Rubber Parts
* Replaceable
** Non-Replaceable
** (6) - Bypass Ball for
1
⁄
2
" - 1" sizes only are
non-replaceable.
Bypass Feature*
This regulator has a built-in
thermal expan-sion bypass
feature. This feature
prevents downstream
pressure from rising to
more than 10psi above
the supply pressure.
* The bypass feature will
not prevent the pressure
relief valve from opening
on the hot water
supply system
withpressure above
150psi (10.3 bar).
You are required to thoroughly read all installation instructions and product
safety information before beginning the installation of this product.
FAILURE
TO COMPLY WITH PROPER INSTALLATION AND MAINTENANCE
INSTRUCTIONS COULD RESULT IN PRODUCT FAILURE WHICH CAN
CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/OR DEATH.
Watts is not responsible for damages resulting from improper installation and/or
maintenance.
Local building or plumbing codes may require modifications to the information
provided. You are required to consult the local building and plumbing codes prior
to installation. If this information is not consistent with local building or plumbing
codes, the local codes should be followed.
WARNING
!
For valves with CPVC or PEX end connections, do not exceed the
tubing manufacturers pressure and temperature ratings. Refer to the
tubing manufacturers product specifications for that information.
WARNING
!
WARNING
!
Installation Instructions • Instrucciones de instalación • Instructions d’installation
WARNING:
This product contains chemicals known to the
State of California to cause cancer and birth defects or other
reproductive harm.
For more information: www.watts.com/prop65
ADVERTENCIA:
Este producto contiene sustancias químicas
que en el Estado de California se conocen como causantes
de cáncer y malformaciones u otros daños reproductivos.
Para más información: www
.watts.com/prop65
AVER
TISSEMENT:
Ce produit contient des produits chi-
miques reconnus par l’État de Californie comme étant can-
cérigènes et pouvant provoquer des anomalies congénitales
ou affecter la capacité de reproduction.
Pour plus d'informations: www
.watts.com/prop65
WATTS
PRESSURE GAUGE
(2 PLACES)
WATTS
SHUTOFF VALVE
(2 PLACES)
WATTS
BACKFLOW
PREVENTER
WATTS
PRESSURE
REGULATOR
WATER
METER
SUPPLY
TO FIXTURES
TO SILLCOCK
Typical Installation
Series Installation
Series installations are recommended where very high supply
pressure must be reduced to a very low downstream pressure.
Reducing the pressure in stages eliminates whistling and noise.
Parallel Installation
Parallel installations are recommended where high flow or low flow
demand is intermittent/occasional. They are also used for installations
where service cannot be interrupted.
1
1
⁄
2
in. (38.1mm)
1
3
⁄
4
in. (44.45mm)
1
7
⁄
8
in. (47.63mm)
1
⁄
2
in.Pipe (12.7mm)
3
⁄
4
in.Pipe (19.05mm)
1 in.Pipe (25.4mm)
WARNING
!
WARNING
!
USA:
T. (978) 688-1811 • F: (978) 794-1848 • www.watts.com
Canada:
T. (905) 332-4090 • F: (905) 332-7068 • www
.watts.ca
Latin America:
T: (52) 81-1001-8600 • watts.com
USA:
T. (978) 688-1811 • F: (978) 794-1848 • www.watts.com
Canada:
T. (905) 332-4090 • F: (905) 332-7068 • www
.watts.ca
Latin America:
T: (52) 81-1001-8600 • watts.com
USA:
T: (978) 688-1811 • F: (978) 794-1848 • watts.com
Canada:
T: (905) 332-4090 • F: (905) 332-7068 • watts.ca
Latin America:
T: (52) 81-1001-8600 • watts.com
For valves with CPVC or PEX end connections, do not exceed the
tubing manufacturers pressure and temperature ratings. Refer to the
tubing manufacturers product specifications for that information.
