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
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 whe
re
ver
y h
igh
su
ppl
y
pre
ssu
re
mus
t b
e 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. 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-U5
LFU5B-Z3
LFU5B-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 compo-
nents. 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 LF276H300 to assist you in determining if you have
high water pressure. The LF276H300 when attached to a hose bibb registers the highest
pressure reading over the period of time it is left on the system.
Installation Guidelines
S eries LFU5B-Z3
Water Pressure Reducing Valve
Válvula reductora de la
presión del agua
Régulateur de pression d'eau
Size:
1
⁄
2
" - 2"
Medidas:
1
⁄
2
a 2 pulg.
Tailles : 0.5 à 2 po
PEX tubing only
Pipe Stiffener
Tail Piece
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)
Union Gasket
(for union
models only)
Seat Gasket
Diaphragm
Seat
Disc Screw
Strainer Plug Gasket
Strainer screen
Bottom Plug Gasket
Disc
Dishwasher
Booster
Reducing
Valve
Watts T&P Relief
Valve
180° Rinse water
140° Incoming Water
Low Pressure
Service
Recommended installation when
regulator is used to control flow
through the booster heater to
dishwasher.
For repair kits and parts, refer to our price list
PL-RP-GP found on
www.watts.com.
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information can result in death,
serious personal injury, property damage,
or damage to the equipment.
Keep this Manual for future reference.
WARNING
!
You ar
e requir
ed to consult the local building and plumbing codes prior to installation. If the
information in this manual is not consistent with local building or plumbing codes, the local
codes should be followed. Inquire with gover
ning authorities for additional local requir
ements.
WARNING
!
Installation Instructions • Instrucciones de instalación • Instructions d’installation
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.
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 también otros derechos que varían según el Estado. Usted debe consultar las leyes estatales
aplicables para determinar 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 d’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.
IS-U5 2104
EDP# 1911439
© 2021 Watts
USA:
T: (978) 689-6066 • F: (978) 975-8350 • Watts.com
Canada:
T: (888) 208-8927 • F: (905) 332-7068 • Watts.ca
Latin America:
T: (52) 55-4122-0138 • Watts.com
IS-U5 2104
EDP# 1911439
© 2021 Watts
USA:
T: (978) 689-6066 • F: (978) 975-8350 • Watts.com
Canada:
T: (888) 208-8927 • F: (905) 332-7068 • Watts.ca
Latin America:
T: (52) 55-4122-0138 • Watts.com
IS-U5 2104
EDP# 1911439
© 2021 Watts
USA:
T: (978) 689-6066 • F: (978) 975-8350 • Watts.com
Canada:
T: (888) 208-8927 • F: (905) 332-7068 • Watts.ca
Latin America:
T: (52) 55-4122-0138 • Watts.com
Maintenance Instructions
• To clean strainer remove the bottom plug and pull out strainer.
To tighten tailpiece, first hand tighten followed by
1
⁄
4
-1 turn using a wrench.
WARNING
!
Depressurize valve before servicing.
Bypass Feature
This regulator has a built-in thermal expansion bypass feature. This feature prevents downstream
pressure from rising to more than 10psi above the supply pressure.
NOTICE
The Bypass feature will not prevent the pressure relief valve from opening on the hot water supply
system with pressures above 150psi (10.3 bar).
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 clearance for
cleaning, service, or adjustment.
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
NOTICE
Product is for interior or exterior applications. Product should not be buried directly 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.
Need for Periodic Inspection/Maintenance:
This product must be tested periodically in
compliance with local codes, but at least once per year or more as service conditions war
-
rant. Corrosive water conditions, and/or unauthorized adjustments or r
epair could render the
product inef
fective for the service intended. Regular checking and cleaning of the product’
s
internal components helps assur
e maximum life and proper pr
oduct function.
Maintenance may be required when the water downstream of the product exhibits one
or more of the following: excessive water pressure, insufficient water pressure or flow, or
inconsistent water pressure.
WARNING
!
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.
CAUTION
!
Any time a reducing valve is adjusted, the use of a pressure gauge is recommended to
ver
ify
cor
rec
t p
res
sur
e s
ett
ing
. D
o n
ot bottom out adjusting screw on spring cage.
For valves with CPVC or PEX end connections, do not exceed the tubing manufacturers
pressur
e and temperature ratings Refer to the tubing manufactur
ers product specifications
for that information.
WARNING
!
