ENGLISH
INSTRUCTIONS
IS-USG-B
1026
EDP# 1915276
© 2010
Watts
IS-USG-B
1026
EDP# 1915276
© 2010
Watts
US
A:
N
o. A
ndo
ver
, M
A •
Te
l. (
978
) 6
88-
181
1 •
Fa
x: (
978
) 7
94-
184
8 •
w
ww
.w
atts
.co
m
Can
ada
:
B
urli
ngt
on,
O
NT.
•
Tel
. (9
05)
33
2-4
090
•
Fax
: (9
05)
33
2-7
068
•
ww
w.w
atts
can
ada
.ca
US
A:
N
o. A
ndo
ver
, M
A •
Te
l. (
978
) 6
88-
181
1 •
Fa
x: (
978
) 7
94-
184
8 •
w
ww
.w
atts
.co
m
Can
ada
:
B
urli
ngt
on,
O
NT.
•
Tel
. (9
05)
33
2-4
090
•
Fax
: (9
05)
33
2-7
068
•
ww
w.w
atts
can
ada
.ca
IS-USG-B
1026
EDP# 1915276
© 2010
Watts
IS-USG-B
US
G-B
-M
1
Description
The Watts
3
⁄
8
" (10mm) compression fitting thermostatic mix ing valve
maintains and limits hot water to desired se lect able temperature
between 80°F and 120°F (27°C and 49°C) and with flow rates as low
as 0.5 gpm (1.9 lpm) and as high as 2.5 gpm (9.5 lpm). The mix ing
valve is list ed to ASSE Stan dard 1070 for sin gle fix ture applications.
The USG-B and LFUSG-B se ries uses a dou ble throt tling de sign to
con trol both the hot and cold wa ter sup ply to the mixed outlet. The
superior flow char ac ter is tics of this valve pro vides accurate tem per a-
ture con trol (±3°F) with low pres sure drop. As an add ed fea ture, the
USG-B-M1 and LFUSG-B-M1 in cor po rates dual check valves to pro-
tect against cross-flow and integral screens to filter out debris. A cap
is provided for three port application.
Temperature Adjustment
1. Loosen the cap screw with the
hex wrench pro vid ed.
2. As a safety feature the cap
must be partially lifted from the
valve to adjust temperature.
3. With the faucet turned on and
in the full hot position, adjust
the setting of the valve to
obtain the desired outlet water
temperature. Turn clockwise to
decrease temperature.
4. Lower handle and tighten screw.
5. Check outlet temperature.
Note:
The hot water should be allowed to flow for two or three min-
utes prior to adjusting the valve set ting in order to have the hottest
inlet tem per a ture flow ing through the valve.
Ser
ies
U
SG
-B
an
d L
FU
SG
-B
Ser
ies
U
SG
-B
y L
FU
SG
-B
Sér
ies
U
SG
-B
et
LFU
SG
-B
Und
er S
ink
G
uar
dia
n™
Te
mpe
rin
g V
alv
es
Vál
vul
as
de
tem
pla
do
deb
ajo
d
el f
reg
ade
ro
Gua
rdi
an™
Sou
pap
es
de
rég
lag
e G
uar
dia
n™
so
us
l’é
vie
r
3
⁄
8
" (
10m
m)
Ins
tal
lat
ion
In
str
uct
ion
s
Ins
tru
cci
one
s d
e in
sta
lac
ión
Ins
tru
ctio
ns
d’in
sta
lla
tio
n
Approval: CSA B-125
Listing: ASSE 1070
Basic Construction
Two Handle Faucet
Applications
The unit is intended for under sink installation to con trol the hot water temper-
ature and prevent ac ci den tal scalding. The water temperature must be ad just-
ed by the installer using a thermometer to mea sure the hot water temperature
at the faucet outlet. Maximum tem per a ture of 110°F (43°C) is rec om mend ed.
Application Note
Delivery of water to fixtures intended for use in bath ing or wash ing
should always be controlled by valves listed to ASSE Stan dard 1016 or
ASSE Standard 1070 such as Watts Series USG, LFUSG, MMV, LFMMV,
L111, or LFL111 mix ing valves.
These valves provide the user with both scald protection and pro tec tion from
thermal shock. These valves should always be ad just ed after installation to
de sired temperature.
Typical Installations
The Watts Series USG-B and LFUSG-B
Under Sink Guardian installs easily onto
most faucets.
• Shut off supply valves and remove exist-
ing pip ing to faucet.
• Connect the USG-B-M1 or LFUSG-B-M1
to the supply valves and the faucet.
• Turn on the supply valves.
Note:
When using copper tubing, tubing
should not ex tend more than
3
⁄
16
” beyond
the compression fer rule.
Spout
Sensor
Control
Module
Transformer
Solenoid Valve
Hot Supply
Cap
Watts
USG-B-M1
or
LFUSG-B-M1
Cold Supply
USG-B-M1
or
LFUSG-B-M1
Mesh Screen
Check module
Button Head Screw
Locking Adjusting Cap
Ball
O-ring
Stem
Thermostat
Metal Disc
Piston
O-ring
Spring
Body
Check Module
Sensor Faucet
Lim
ite
d W
arr
ant
y:
W
atts
Re
gul
ato
r C
o. (
the
“C
om
pan
y”)
w
arr
ant
s e
ach
pr
odu
ct t
o b
e fr
ee
fro
m d
efe
cts
in
mat
eria
l a
nd
wor
km
ans
hip
un
der
no
rm
al u
sag
e fo
r a
pe
rio
d o
f o
ne
yea
r fr
om
th
e d
ate
of
or
igi
nal
sh
ip-
men
t.
In
the
ev
ent
of
su
ch
def
ect
s w
ith
in
the
w
arr
ant
y p
erio
d, t
he
Com
pan
y w
ill,
at
its
op
tio
n, r
epl
ace
or
rec
ond
itio
n th
e p
rod
uct
w
ith
out
ch
arg
e.
THE
W
ARR
ANT
Y
SET
F
ORT
H
HER
EIN
I
S
GIV
EN
EXP
RES
SLY
A
ND
IS
THE
O
NLY
W
ARR
ANT
Y
GIV
EN
BY
THE
C
OM
PAN
Y W
ITH
R
ESP
ECT
T
O T
HE
PRO
DUC
T.
T
HE
COM
PAN
Y M
AKE
S N
O O
THE
R
WAR
RAN
TIE
S,
EXP
RES
S O
R I
MPL
IED
.
THE
C
OM
PAN
Y H
ERE
BY
SPE
CIF
ICA
LLY
D
ISC
LAI
MS
ALL
OTH
ER
WAR
RAN
TIE
S,
EXP
RES
S O
R I
MPL
IED
, I
NCL
UDI
NG
BUT
N
OT
LIM
ITE
D T
O T
HE
IM
PLI
ED
WAR
RAN
TIE
S O
F M
ERC
HAN
TAB
ILI
TY
AND
FI
TNE
SS
FOR
A
PAR
TIC
ULA
R P
URP
OSE
.
The
re
med
y d
esc
rib
ed
in
the
fi
rst
p
ara
gra
ph
of
thi
s w
arr
ant
y s
hal
l c
ons
titu
te
the
so
le
and
e
xcl
usi
ve
rem
edy
fo
r b
rea
ch
of
war
ran
ty,
an
d t
he
Com
pan
y s
hal
l n
ot
be
res
pon
sib
le
for
an
y in
cid
ent
al,
spe
cia
l
or
con
seq
uen
tia
l d
am
age
s, i
ncl
udi
ng
with
out
lim
ita
tio
n, l
ost
pr
ofit
s o
r th
e c
ost
of
re
pai
rin
g o
r r
epl
aci
ng
oth
er p
rop
erty
w
hic
h is
da
mag
ed
if t
his
pr
odu
ct d
oes
no
t w
ork
pr
ope
rly
, o
the
r c
ost
s re
sul
tin
g fr
om
la
bor
cha
rge
s, d
ela
ys,
va
nda
lis
m, n
egl
ige
nce
, fo
ulin
g c
aus
ed
by
for
eig
n m
ate
ria
l, d
am
age
fr
om
ad
ver
se
wat
er
con
diti
ons
, c
hem
ica
l, o
r a
ny
oth
er c
irc
um
sta
nce
s o
ver
w
hic
h th
e C
om
pan
y h
as
no
con
tro
l.
Thi
s w
arr
ant
y
sha
ll b
e in
val
ida
ted
by
an
y a
bus
e, m
isu
se,
m
isa
ppl
ica
tio
n, i
mpr
ope
r in
sta
lla
tio
n o
r im
pro
per
m
ain
ten
anc
e
or
alte
rat
ion
of
th
e p
rod
uct
.
Som
e S
tat
es
do
not
al
low
lim
ita
tio
ns
on
how
lo
ng
an
im
plie
d w
arr
ant
y la
sts
, a
nd
som
e S
tat
es
do
not
al
low
the
ex
clu
sio
n o
r li
mita
tio
n o
f in
cid
ent
al o
r c
ons
equ
ent
ial
da
mag
es.
T
her
efo
re
the
ab
ove
lim
ita
tio
ns
may
not
ap
ply
to
yo
u.
Thi
s L
im
ite
d W
arr
ant
y g
ive
s y
ou
spe
cifi
c le
gal
rig
hts
, a
nd
you
m
ay
hav
e o
the
r r
igh
ts
tha
t v
ary
fr
om
S
tat
e t
o S
tat
e.
Yo
u s
hou
ld
con
sul
t a
ppl
ica
ble
st
ate
la
ws
to
det
erm
ine
yo
ur
rig
hts
.
SO
FAR
AS
IS
CO
NSI
STE
NT
WIT
H A
PPL
ICA
BLE
ST
ATE
LA
W, A
NY
IM
PLI
ED
WAR
RAN
TIE
S T
HAT
M
AY
NOT
BE
DIS
CLA
IM
ED,
IN
CLU
DIN
G T
HE
IM
PLI
ED
WAR
RAN
TIE
S O
F M
ERC
HAN
TAB
ILI
TY
AND
FI
TNE
SS
FOR
A P
ART
ICU
LAR
PU
RPO
SE,
A
RE
LIM
ITE
D IN
D
URA
TIO
N T
O O
NE
YEA
R F
ROM
TH
E D
ATE
O
F O
RIG
INA
L
SHI
PM
ENT
.
Gar
ant
ía
lim
ita
da:
W
atts
R
egu
lat
or C
o. (
en
ade
lan
te,
“l
a C
om
pañ
ía”
) g
ara
ntiz
a, p
or u
n p
erío
do
de
un
año
a
par
tir
de
la
fec
ha
de
em
bar
que
or
igi
nal
, q
ue
sus
pr
odu
cto
s e
stá
n lib
res
de
de
fec
tos
en
m
ate
ria
les
y m
ano
de
ob
ra
baj
o c
ond
icio
nes
de
us
o n
orm
al.
En
ca
so
de
que
se
en
cue
ntre
n ta
les
de
fec
tos
de
ntro
de
l p
erío
do
de
gar
ant
ía,
la
Com
pañ
ía
ree
mpl
aza
rá
o re
aco
ndi
cio
nar
á, a
su
el
ecc
ión
, e
l p
rod
uct
o s
in
cos
to
alg
uno
.
LA
GAR
ANT
ÍA
AQU
Í E
STI
PUL
ADA
S
E O
TOR
GA
EN
FOR
MA
EXP
RES
A Y
E
S L
A Ú
NIC
A G
ARA
NTÍ
A
OTO
RGA
DA
POR
LA
CO
MPA
ÑÍA
EN
RE
LAC
IÓN
CO
N E
L P
ROD
UCT
O.
LA
COM
PAÑ
ÍA
NO
OTO
RGA
NI
NGU
NA
OTR
A G
ARA
NTÍ
A,
YA
SEA
E
XPR
ESA
O
IM
PLÍ
CIT
A.
L
A C
OM
PAÑ
ÍA
POR
L
A P
RES
ENT
E R
ENU
NCI
A
ESP
ECÍ
FIC
AM
ENT
E A
T
ODA
S L
AS
DEM
ÁS
GAR
ANT
ÍAS
, E
XPR
ESA
S O
IM
PLÍ
CIT
AS,
IN
CLU
YEN
DO
SIN
LIM
ITA
CIÓ
N, L
AS
GAR
ANT
ÍAS
IM
PLÍ
CIT
AS
DE
APT
ITU
D P
ARA
LA
CO
MER
CIA
LIZ
ACI
ÓN
E ID
ONE
IDA
D P
ARA
UN
PRO
PÓS
ITO
EN
PA
RTI
CUL
AR.
La
sol
ució
n d
esc
rita
e
n e
l p
rim
er
pár
raf
o d
e e
sta
g
ara
ntía
c
ons
titu
irá
la
ú
nica
y
e
xclu
siva
s
olu
ció
n p
or
inc
um
plim
ien
to
de
gar
ant
ía,
y
la
C
om
pañ
ía
no
se
har
á r
esp
ons
abl
e p
or
dañ
os
acc
ide
nta
les
, e
spe
cia
les
o
ind
ire
cto
s, i
nclu
yen
do
sin
lim
ita
ció
n, l
a p
érd
ida
de
ga
nan
cia
s o
el
co
sto
de
re
par
ació
n o
re
em
pla
zo
de
otra
pro
pie
dad
qu
e re
sul
te
dañ
ada
po
r e
l m
al f
unc
ion
am
ien
to
de
est
e p
rod
uct
o, o
tro
s c
ost
os
res
ulta
nte
s p
or m
ano
de
obr
a, r
eta
rdo
s, v
and
alis
mo,
ne
glig
enc
ia,
ob
stru
ccio
nes
oc
asio
nad
as
por
m
ate
ria
les
ex
tra
ños
, d
año
s d
ebi
dos
a c
ond
icio
nes
ad
ver
sas
de
l a
gua
, q
uím
ico
s o
cu
alq
uie
r o
tra
ci
rcu
nst
anc
ia
sob
re
la
cua
l la
Co
mpa
ñía
no
te
nga
con
tro
l.
Est
a g
ara
ntía
n
o t
end
rá
val
ide
z e
n c
ual
qui
er
cas
o d
e a
bus
o,
uso
in
deb
ido
, a
plic
ació
n i
nco
rre
cta
,
ins
tal
ació
n in
ade
cua
da,
o
man
ten
im
ien
to
ade
cua
do
o a
lte
rac
ión
de
l p
rod
uct
o.
Alg
uno
s E
sta
dos
no
pe
rm
ite
n lim
ita
cio
nes
en
la
dur
ació
n d
e u
na
gar
ant
ía
im
plíc
ita
y a
lgu
nos
Es
tad
os n
o p
erm
ite
n
la
exc
lus
ión
o l
im
ita
ció
n d
e d
año
s a
ccid
ent
ale
s o
ind
ire
cto
s. P
or l
o ta
nto
, e
s p
osib
le
que
las
lim
ita
cio
nes
an
ter
ior
es
no
sea
n a
plic
abl
es e
n su
ca
so.
E
sta
ga
ran
tía
lim
ita
da
le
da
der
ech
os l
ega
les
es
pec
ífic
os;
us
ted
po
dría
te
ner
ta
m-
bié
n o
tro
s d
ere
cho
s q
ue
var
ían
se
gún
el
Es
tad
o.
Ust
ed
deb
e c
ons
ulta
r la
s le
yes
es
tat
ale
s a
plic
abl
es
par
a d
ete
r-
min
ar s
us
der
ech
os.
EN
LA
MED
IDA
EN
QU
E S
EA
CON
GRU
ENT
E C
ON
LAS
LE
YES
ES
TAT
ALE
S A
PLI
CAB
LES
,
CUA
LQU
IER
GA
RAN
TÍA
IM
PLÍ
CIT
A Q
UE
NO
SEA
RE
CHA
ZAD
A, I
NCL
UYE
NDO
LA
S G
ARA
NTÍ
AS
IM
PLÍ
CIT
AS
DE
APT
ITU
D P
ARA
LA
CO
MER
CIA
LIZ
ACI
ÓN
E ID
ONE
IDA
D P
ARA
UN
PR
OPÓ
SIT
O E
N P
ART
ICU
LAR
, S
E L
IM
ITA
EN
SU
DUR
ACI
ÓN
A U
N A
ÑO
A P
ART
IR
DE
LA
FEC
HA
DEL
EM
BAR
QUE
OR
IGI
NAL
.
Gar
ant
ie
lim
ité
e :
W
atts
Re
gul
ato
r C
o. (
la
« S
oci
été
»)
gar
ant
it q
ue
cha
cun
de
se
s p
rod
uits
es
t e
xem
pt d
e
vic
e d
e m
até
ria
u e
t d
e fa
bric
atio
n d
ans
de
s c
ond
itio
ns
nor
mal
es
d’u
tilis
atio
n p
our
un
e p
ério
de
d’u
n a
n à
com
pte
r d
e la
da
te
d’e
xpé
diti
on
d’o
rig
ine
. D
ans
l’é
ven
tua
lité
où
de
te
ls
vic
es
se
man
ife
ste
rai
ent
pe
nda
nt
la
pér
iod
e d
e g
ara
ntie
, la
So
cié
té,
à
sa
disc
rét
ion
, re
mpl
ace
ra
ou
rec
ond
itio
nne
ra
le
pro
dui
t s
ans
fra
is.
LA
PRÉ
SEN
TE
GAR
ANT
IE
EST
E
XPR
ESS
E E
T R
EPR
ÉSE
NTE
L
A S
EUL
E G
ARA
NTI
E O
FFE
RTE
P
AR
LA
SOC
IÉT
É P
OUR
C
E P
ROD
UIT
. L
A S
OCI
ÉTÉ
N
’OF
FRE
A
UCU
NE
AUT
RE
GAR
ANT
IE,
EX
PRE
SSE
O
U
TAC
ITE
. P
AR
LA
PRÉ
SEN
TE,
L
A S
OCI
ÉTÉ
R
EJE
TTE
S
PÉC
IFI
QUE
MEN
T T
OUT
E A
UTR
E G
ARA
NTI
E,
EXP
RES
SE
OU
TAC
ITE
, N
OTA
MM
ENT
T
OUT
E G
ARA
NTI
E T
ACI
TE
DE
QUA
LIT
É M
ARC
HAN
DE
OU
D’A
DAP
TAT
ION
À
UN
BUT
PA
RTI
CUL
IER
.
Le
rec
our
s d
écr
it d
ans
le
pr
em
ier
pa
rag
rap
he
de
cet
te
gar
ant
ie
con
stit
ue
le
seu
l re
cou
rs
à to
ute
vio
lat
ion
de
la
pré
sen
te
gar
ant
ie.
La
So
cié
té
ne
sau
rai
t ê
tre
te
nue
re
spo
nsa
ble
de
to
ut d
om
mag
e a
cce
sso
ire
, s
pé-
cia
l o
u in
dire
ct,
y c
om
pris
, d
e fa
çon
no
n lim
ita
tive
: la
pe
rte
de
pr
ofit
s o
u le
co
ût a
ffé
ren
t à
la
ré
par
atio
n o
u
au
rem
pla
cem
ent
d’
aut
res
bi
ens
qu
i s
era
ien
t e
ndo
mm
agé
s p
ar s
uite
du
fo
nct
ion
nem
ent
in
cor
rec
t d
udi
t
pro
dui
t ;
d’a
utre
s c
oût
s ré
sul
tan
t d
e fr
ais
de
mai
n-d
’œ
uvr
e, d
e re
tar
ds,
de
va
nda
lism
e, d
e n
égl
ige
nce
,
d’u
ne
obs
tru
ctio
n c
aus
ée
par
de
s m
até
ria
ux
étra
nge
rs,
de
do
mm
age
s c
aus
és
par
un
e e
au
im
pro
pre
,
des
pr
odu
its
ch
im
iqu
es
ou
par
to
ut a
utre
év
éne
men
t é
cha
ppa
nt a
u c
ont
rôl
e d
e la
So
cié
té.
La
pr
ése
nte
gar
ant
ie
est
dé
cla
rée
nu
lle
et
no
n a
ven
ue
en
cas
d’
usa
ge
abu
sif
ou
inc
orre
ct,
d’a
ppl
ica
tio
n, d
’in
sta
lla
tio
n
ou
d’e
ntre
tie
n in
cor
rec
ts
ou
de
mod
ific
atio
n d
u p
rod
uit.
Cer
tai
ns
Éta
ts
n’a
uto
rise
nt p
as
les
lim
ita
tio
ns
de
dur
ée
d’u
ne
gar
ant
ie
tac
ite
ou
l’e
xcl
usio
n o
u la
lim
ita
-
tio
n d
es
dom
mag
es
acc
ess
oire
s o
u in
dire
cts
. L
es
lim
ita
tio
ns
sus
men
tio
nné
es
peu
ven
t d
onc
n
e p
as
s’a
ppl
iqu
er à
vo
us.
Ce
tte
ga
ran
tie
lim
ité
e v
ous
do
nne
de
s d
roi
ts
spé
cifi
que
s e
t il
se
pe
ut q
ue
vou
s a
yez
aus
si d
’au
tre
s d
roi
ts
qui
va
rie
nt d
’un
Ét
at à
l’a
utre
. V
eui
lle
z v
ous
ré
fér
er a
ux
loi
s a
ppl
ica
ble
s d
e l’
Éta
t p
our
dét
erm
ine
r v
os
dro
its
en
la
m
atiè
re.
DAN
S L
A M
ESU
RE
PER
MIS
E P
AR
LA
LOI
AP
PLI
CAB
LE
DE
L’É
TAT
,
TOU
TES
LE
S G
ARA
NTI
ES
TAC
ITE
S N
E P
OUV
ANT
PA
S Ê
TRE
RE
JET
ÉES
, Y
CO
MPR
IS
LES
GA
RAN
TIE
S
TAC
ITE
S D
E Q
UAL
ITÉ
M
ARC
HAN
DE
ET
D’A
DAP
TAT
ION
À
U
N B
UT
PAR
TIC
ULI
ER,
S
ONT
LI
MIT
ÉES
QUA
NT
À L
EUR
DU
RÉE
À
UN
AN
À C
OM
PTE
R D
E L
A D
ATE
D’
EXP
ÉDI
TIO
N D
’OR
IGI
NE.
US
A:
N
o. A
ndo
ver
, M
A •
Te
l. (
978
) 6
88-
181
1 •
Fa
x: (
978
) 7
94-
184
8 •
w
ww
.w
atts
.co
m
Can
ada
:
B
urli
ngt
on,
O
NT.
•
Tel
. (9
05)
33
2-4
090
•
Fax
: (9
05)
33
2-7
068
•
ww
w.w
atts
can
ada
.ca
