S59-2005T1
Installation
6
1/8/2020
Bradley
• 215-1737 Rev. C: ECO 19-03-024
Troubleshooting: Piston Disassembly and Cleaning
Check the piston for free and smooth movement
Valve Body
Liner
Spring
Piston Assembly
Piston (Push in, then
release to check for
smooth movement)
Thermostat Pushrod
Thermostat
Seat Assembly
Retainer
Cap with Stem
Screws
Arrow on cap must point to HOT side.
Remove the handle and escutcheon to expose the valve
assembly. Loosen the two screws that hold the valve
assembly in the valve body. Remove the valve assembly.
Gently pry the retainer off the valve assembly. This will
separate the cap and liner exposing other components.
Disassemble components.
Push in on the piston with your finger (the piston should
move freely). If not, the piston and liner assembly needs
to be cleaned.
Clean the piston and liner assembly with any cleaner
suitable for brass and stainless steel (400-grit sandpaper
may be used to polish and hone the piston and liner). If
the piston does not move freely after a thorough cleaning,
the piston/liner assembly must be replaced.
Troubleshooting: Thermostatic Mixing Shower Valve
Before attempting to troubleshoot the valve or disassemble the components, check for the following:
• Stop/check valves are fully open and that all inlet and outlet shut-off valves are open
• Hot and cold inlet pipes are connected properly, and that there are no cross-connectio ns or leaking
stop/check valves
• Water heater output is at least 15°F above the set temperature.
Be sure to close the appropriate shut-off valves prior to disassembly of the valve and reopen the valves
after inspection and repair is complete.
Problem
Cause
Solution
External leaks in
the system
Either the NPT joints or the O-rings have been
damaged.
Replace the NPT joints and/or O-rings where necessary.
For replacement of O-rings, order the O-ring/seat kit as
specified in the included Service Guide.
Limited water flow
Dirt and debris have collected on the stop/check
valve seat, limiting the movement of the stop/
checks.
Clean Stop and Check Valves:
Remove the stop and checks, clean the screen and seat
and reassemble the valve. Do not remove the seat. The
components may be brushed with a small wire brush to
remove debris. If the stop/check valves need to be replaced,
contact your Bradley representative and ask for Stop/Check
Valve (S27-102).
Temperature
fluctuation
or improper
Temperature
Thermostat is slowly failing.
Inspect Thermostat:
1. At room temperature (80°F or less), remove the valve
assembly from the valve body as described below.
2. Place the thermostat into a small container filled with
115°F water. The thermostat's pushrod should pop
out of the thermostat approximately 1/10".
3. If the pushrod does not pop out, the thermostat must
be replaced (it cannot be repaired). Order a new
thermostat kit as specified in the Service Guide.
Inlet supply line to the mixing valve is being
shared by other pieces of equipment that are
used only periodically, such as laundry appliances
or washdown stations. It may reduce the inlet
pressure to the mixing valve to less than 3 PSI.
The supply line size may not be large enough to
supply both the valve and the other appliances.
Enlarge the supply line size, reconfigure the supply line or
regulate the supply usage.
Valve temperature is not properly set.
Adjust the temperature as described on page 3.
Piston does not move freely and must be cleaned. Clean the piston as described below.