F
−
1031, Section 2111
Page 8 of 10
Maintenance
Optional Intake Screens
Corrosion Protection
Figure 4. Bolt
−
on Anodes
Once per month check to make sure the intake screens
are not clogged or damaged. Also check for corrosion, and
replace screens if damage is severe. For the screen to
adequately control corrosion, there must be a strong
electrical contact between the screen and the fitting.
Remove any corrosion, debris or paint from the counter
bore that will insulate the screen from the intake fitting. If
the screen does not fit tightly, adjust the gap of the slot on
the outside diameter of the screen to ensure a tight fit.
NOTE: These screens are die
−
cast which results in a
slight taper from one side to the other. Install the
screen with the thinner cross
−
section facing out to
minimize flow restriction.
Figure 3. Intake Screens
Optional Anodes
Twice per year, remove the anodes and check for erosion
of the replaceable elements. Replace the elements if more
than half of either of the elements has eroded.
Anodes are normally mounted on the pump intake piping,
but they may also be installed in the discharge piping if no
intake mounting locations were available. Physical mount-
ing of the anode may be via an NPT tap or bolt
−
on flange
as described below.
NOTE: The replaceable elements must make contact
with water to be effective. Do not paint or use any
other coating on the replacement elements.
Bolt
−
on Anodes
Unscrew the (4) hex head screws from the pump. If
elements require replacement, unscrew the hex head
cap screw.
NOTE: There is no need to remove the threaded
anode adapter from the anode flange for element
replacement. The screw was installed using thread
sealant so higher force than normal may be
necessary to remove.
Replace one or both elements as necessary. Install the hex
head screw using Loctite 242 (blue) on the screw threads.
Mount the anode assembly back on the fitting.
Threaded Anodes
NOTE: The 2
−
1/2 in. hex is threaded into a bushing
that should remain on the pump. Be sure to restrain
the bushing when removing the 2
−
1/2 in. hex.
Unscrew the 2
−
1/2 in. hex from the pump. If the elements
require replacement, unscrew the hex head cap screw.
NOTE: The screw was installed using thread sealant
so higher force than normal may be necessary to
remove.
Replace one or both elements as necessary. Install the
hex head screw using Loctite 242 (blue) on the screw
threads. Remove any paint or corrosion from the face
around the NPT tap on the pump. Apply thread sealant to
the threads and screw the 2
−
1/2 in. hex into the pipe tap
until tight.
Figure 5. Threaded Anodes
