Wall cabinet in white enamel finish
including wall mounting bracket
Nickel plated
Stainless steel cabinet in place of
standard white cabinet
Wall mounting bracket
Separate Stops (7-225-CK-MS only)
Connections: 1/2” male NPT
1/2” female sweat
Connections: 1/2” female NPT
Connections: 1/2” PEX
Connections: 3/4” male NPT
Connections: 3/4” female sweat
Specification
Water temperature limiting valve including integral
checks and dual stainless steel strainers for double
protection against suspended particles in supply
lines. Valve made from lead free* metal components
(see table 1 for ow rates).
Temperature control range:
60°F - 140°F (15.6°C - 60°C)
Minimum supply pressure: 20 psi (138 kPa)
Maximum supply pressure: 125 psi (862 kPa)
Inlet to outlet temperature differential: 10°F (5.55°C)
*According to US Senate bill S.3874, the term “lead free” is dened as
follows: “not more than a weighted average of 0.25 percent lead when
used with respect to the wetted surfaces of pipes, pipe ttings, plumbing
ttings, and xtures”
Compliance
-ASME A112.18.1; CSA B125.1
Note: Append appropriate -sufx to model number.
Warranty
5 Years - for commercial installations.
Refer to www.symmons.com/warranty for complete
warranty information.
Valve Model
7-225-CK-MS
7-225-CK-F
7-225-CK-
PEX
7-230-CK-M
7-230-CK-FS
1
Size
Connection
1/2” Male NPT
1/2” Female Sweat
(13 mm)
1/2” Female NPT
(13 mm)
1/2” PEX
(13 mm)
3/4” Male NPT
(19 mm)
3/4” Female Sweat
(19 mm)
Symmons Industries, Inc. ■ 31 Brooks Drive ■ Braintree, MA 02184 ■ (800)796-6667 ■ Fax: (800)961-9621
For assistance in sizing and selection of the proper
valve, consult your local representative or Symmons
Customer Service.
Installing Valve
1) Flush piping thoroughly prior to installing.
2) Install valve so as to allow clearance for replacing
cartridge. Valve can be installed in any orientation.
3) Connect valve input/ouput to supply ports.
a. Hot port marked (H)
b. Cold port marked (C)
c. Mixed output port marked (M)
protective cap
retaining nut
cartridge
Valve
clearance
4"
102 mm
Protective Cap
Temperature
Adjust
4) Place thermometer in the outlet stream. Measure
and accurately set temperature. Inlet temperature
must be ± 10°F (5.55°C) of desired output.
5) To increase temperature turn safety cap
counter-clockwise. To decrease temperature turn
safety cap clockwise.
(H) HOT
supply port
(M) MIXED
output port
(C) COLD
supply port
Setting Valve Temperature
1) Turn hot and cold water supply on.
2) Open faucet to allow hot water to ow for a
minimum of one minute. For two handle faucets
turn on hot water only. For single handle faucets
turn on to the hot position.
3) Remove the safety cap by inserting a small at
tip screw driver into the wide slot at the base of
the cap and pry upward, then ip the safety cap
over 180 degrees and t onto the end of valve
spindle.
4
Symmons Industries, Inc. ■ 31 Brooks Drive ■ Braintree, MA 02184 ■ (800)796-6667 ■ Fax: (800)961-9621
For single temperature applications adjust valve
outlet temperature with full ow of tempered
water from tting.
For dual temperature applications open
approximately 50% of all faucets to their full hot
position to ensure proper operating temperature
at peak demand.
6) Remove safety cap from end of valve spindle and
ip over 180 degrees, then press cap down and
snap back onto valve body to replace.
Note: Once the safety cap is snapped onto the
valve body the outlet temperature cannot be
changed without repeating steps 2-6.
Warning: Water temperatures in excess of
110°F (43°C) may cause scalding or
severe injury!
HOT
WATER
TANK,
HEATER,
ETC.
Main hot supply
Cold supply
Lavatory
faucet
Tub
valve
(V1)
valve
(V2)
MAXLINE
valve
MAXLINE
valve
Tempered
hot supply
Tempered
hot supply
7-225, 7-230 Series
Maxline
Operation & Maintenance Manual
Installation
Point of Use Diagram
Multiple Fixtures Diagram
5
High temperature hot supply
(if required for laundry, etc.)
HOT
WATER
TANK,
HEATER,
ETC.
Symmons Industries, Inc. ■ 31 Brooks Drive ■ Braintree, MA 02184 ■ (800)796-6667 ■ Fax: (800)961-9621
Inspect cartridge within 30 days of initial operation.
If inspection determines that your water system is
causing deposits and foreign matter to build-up,
then adjust cartridge maintenance accordingly.
Cartridge Replacement
1) Shut off hot and cold water supplies to valve.
2) Remove safety cap by inserting a small
screwdriver into the widest opening at the base
of the cap and pry upward. This will expose the
cartridge stem and cartridge retaining unit.
3) Remove retaining nut by turning counter-clockwise
with adjustable wrench. Grasp cartridge with
pliers and remove from body by pulling straight
out. A slight rocking rotation may be required to
loosen while removing.
on front of valve casting as shown below to the
left. Install retaining nut back onto valve body.
5) Refer to “Setting Valve Temperature” section (pg.4)
to properly set valve to desired temperature.
Service Instructions
Cleaning or replacing lter washer and check valve:
1) Remove union adapter nut from valve body and
then valve tting from union adapter.
2) Clean lter washer seated in valve tting by
soaking both in household vinegar and rinse under
running water. Ensure not to damage screen in
lter washer.
3) Replace lter washer into center of valve tting.
4) Replace check valve by removing from center of
valve body port connection.
4) Lubricate cartridge o-rings with a small amount of
lubricant prior to reinstalling. Insert replacement
cartridge into valve body, applying enough force to
ensure cartridge is fully seated. Install cartridge
with keyway inline with Symmons logo located
retaining nut
Torque to 132 inch lbs. (15Nm)
6
Symmons Industries, Inc. ■ 31 Brooks Drive ■ Braintree, MA 02184 ■ (800)796-6667 ■ Fax: (800)961-9621
5) Fasten and tighten union adapter nut over valve
tting to valve body.
Seasonal Use
If valve is used seasonally, such as in schools or
campgrounds, then perform the following steps to
avoid damage caused by freezing water when valves
are not in use:
1) Shut off hot and cold water supplies.
2) Remove valve cartridge and drain all water.
3) Drain water from the supply lines and valve body.
7-225, 7-230 Series
Maxline
Operation & Maintenance Manual
Care and Cleaning
Remove cartridge and clean valve body in household vinegar to remove corrosive mineral build up. Rinse
under running hot water to ensure valve is free of foreign debris.
Trouble Shooting Chart
ProblemCauseSolution
1) Remove lter washer and clean
under running water or replace by
ordering check valve/union tting
Water ow is less than normal.
Screen in valve is dirty or cartridge
is dirty or clogged.
2) Remove cartridge and clean in
household vinegar or replace by
ordering cartridge replacement kit.
replacement kit.
Valve is leaking around the cap
retaining nut area.
Tempered hot water temperature
is not hot enough.
Water leaking from o-ring seal.
Hot water supply into valve is not
10°F (5.55°C) above desired set
point temperature.
Replace o-ring by ordering
cartridge replacement kit.
Increase hot water supply
temperature into valve.
7
Symmons Industries, Inc. ■ 31 Brooks Drive ■ Braintree, MA 02184 ■ (800)796-6667 ■ Fax: (800)961-9621