HG-8 dIsassemBly and reassemBly InstructIons
the handheld to the antenna on the
controller interface mounted inside of
the device. Using the programming
keys of the handheld run a 2 minute
manual flush sequence.
NOTE: Plunger inside solenoid
should be down when running
and up when off.
4. To prevent the loss of the solenoid
plunger and spring, place an object
or have a finger over the plunger
of the solenoid. Allow the plunger
enough space to kick out of the
solenoid body into the object or
finger hovering over it.
5. If test is successful, return the
flush/meter assembly to its operating
position below grade.
6. Return insulation pad and
cast iron meter lid to their proper
positions.
If everything checks out, the
electrical system is in working
order.
Valve Disassembly and check
1. Remove six (6) bolts from top
cover.
2. Slowly pull cover off the valve.
3. Remove rubber diaphragm and
inspect for holes or worn areas.
4. Be certain to avoid contacting
the EPDM rubber diaphragm with
pipe putty. Pipe putty can cause the
rubber to thin out and leak.
5. Remove the valve screen plug on
the lower half of the valve body. Be
careful not to exert too much force
when pulling plug out.
6. Check for debris in the valve
screen on the inlet side with the
lower half of the valve body by
removing the valve screen plug.
hydro-guard
®
hg-8 Warm Climate Flushing System
diassembly/reassembly Instructions
7
Although the Hydro-Guard
®
HG-8
Warm Climate Sub-Surface Unit was
delivered completely assembled, it
may be necessary and/or desirable
to disassemble portions of the Unit,
or the Unit in its entirety, in order to
allow for required service and
maintenance. If disassembly is
necessary, please follow the
directions below. Always close the
curb stop before working on the unit.
Disassembly
1. Shut off water supply to the unit
and remove the green housing
cover.
2. Remove the composite or cast
iron lid of HG-8 protective ground
sleeve.
3. Remove foam insulation pad.
4. Backup to stress point then
push down on the camlock
release handles to disengage the
camlocks prior to lifting the flushing
components out of the device.
5. Using the lifting holes and/or lifting
strap in the steel platform, raise
and remove the flushing system
assembly out of the meter box.
6. Modular design of valve and
double check valve allow for service
to be completed without removal of
the devices’ bodies from the piping
assembly.
Electrical System check
1. Pull internals of HG-8 out of PVC
in-ground protective housing.
2. Unscrew solenoid from valve–
be careful to not drop the solenoid
plunger and spring into in-ground
housing.
3. Using the Node Controller, run a
2 minute manual flush seequence.
or using the TBoS-II handheld,
connect the infrared connector of
7. Return valve plug to its proper
location when debris screen is
cleared.
8. Replace the top cover back onto
the diaphragm – make sure to line
up the openings in both.
9. Match up the top cover of the
valve with the bottom portion.
The arrows have to align on both
portions.
10. Replace the bolts and tighten
down.
WARNING: Avoid overuse
of pipe sealant and never allow
sealant to come into contact
with EPDM rubber diaphram.
Reassembly
1. If any disassembly has been
conducted of the control valve and/
or double check valve, verify that all
bolts are properly tightened. Check
assemblies for leakage prior to
lowering flushing/metering assembly
back into position below grade.
2. Using lifting holes and/or lifting
strap on steel plate, lower flushing
assembly below grade by slowly
lowering the steel frame to the lower
part of the in-ground protective
housing (Do NoT apply excessive
force to assembly). Use Guide in
meter box to allign internols.
3. once lowered back into the
pretective ground sleve, lock the
internols in place by pulling up on
camlock handles.
4. Turn water supply to the unit
on. Using the controller, run a two
minute manual flushing procedure
to confirm all components are
operational.
5. Return insulation pad and lid to
their proper location.
!
TOOLS NEEDED: Philips screwdriver, flat-head screwdriver, HG-20087 T-handle wrench
