Mueller HG-1 Suggested Specifications

SUGGESTED SPECIFICATIONS

HG-1 FLUSHING SYSTEM WITH BUILT-IN
(NODE) or BLUETOOTH PROGRAMMING
CONSTRUCTION

Form 13845 r08-18 page 1 of 6

Automatic Water Distribution Flushing Equipment

Controller Preferences (Select One)

 Built-In Node
 Bluetooth (KR-BL)

1. GENERAL DESCRIPTION

1.1 The equipment furnished under this Section shall be automatic water distribution flushing

equipment designed to be permanently or semi-permanently installed on water distribution lines.

1.2 The primary purpose of this equipment shall be to automatically flush the desired amounts of water

from water distribution systems for the purpose of improving and/or maintaining water quality.

2. PERFORMANCE

2.1 This equipment shall be connected to a water distribution line as required by the plans or standard

installation detail.

2.2 The self-contained device is designed for automatic flushing of the water distribution line through

the opening of a control valve that is an integral part of the unit.

2.3 This equipment shall be capable of being programmed to activate up to 12 times daily on the days

desired in one (1) minute to six (6) hour increments (on a continually rotating 7-day cycle or on an
interval between every 1 to 30 days).

2.4 All programming shall be accomplished by means of an integrated programmer (Built-In) or

Bluetooth.

2.5 Where the Built-In style programming is required, the flushing device must be capable of being

powered by a single 9-volt alkaline battery with the ability to install a secondary 9-volt alkaline
battery for redundancy and extended life.

2.6 The Built-In style programmer shall be capable of being programmed to activate up to 12 times

daily on the days desired in one (1) minute to six (6) hours increments (on a continually rotating 7­day cycle or on an interval between every 1 to 30 days). The Removable style programmer shall
be capable of being programmed to activate up to 24 times daily on the days desired in one (1)
minute to six (6) hours increments (on a continually rotating 7-day cycle or on an interval between
every 1 to 30 days).

2.7 The Bluetooth controlled programmer must be capable of receiving management data

transmissions from up to 25 feet, line of sight.

a. The Bluetooth controller must be capable of being programmed up to 24 times per day and

offer flush durations of one minute to 24 hours per event.

b. The Bluetooth controller must be capable of providing up to 5,000 separate on/off functions

over the life of a single 9-volt Alkaline battery.

c. The Bluetooth controller must be capable of being programmed by a standard Android or iOS

smart phone and the K-Rain and password protected App.

2.8 All programming, Built-in or Bluetooth shall be accomplished by means of an integrated

programmer module that is powered by at least a single 9-volt battery or a Bluetooth equipped
smart phone.

SUGGESTED SPECIFICATIONS

HG-1 FLUSHING SYSTEM WITH BUILT-IN
(NODE) or BLUETOOTH PROGRAMMING
CONSTRUCTION

Form 13845 r08-18 page 2 of 6

2.9 Additional programming capabilities shall include monitoring and flush activation by means of a

S.M.A.R.T. Management controller with the capacity to flush the associated distribution line at the
installation point when the chlorine (total or free) disinfectant residual level falls below the user­defined acceptable level and must offer a minimum of ten (10) independent flush events with a
minimum range of one minute to 24 hours per event. Additionally, the S.M.A.R.T. management
controller shall be capable of monitoring a minimum of two additional water quality parameters with
the potential to be expanded to five additional water quality monitoring parameters. The
S.M.A.R.T. management controller must also be capable of being upgradable to flush on multiple
water quality conditions.

3. ACCEPTABLE MANUFACTURERS

Automatic water distribution flushing equipment to be supplied under this specification, herby known as
the HG-1, shall be Hydro-Guard® as manufactured by the Mueller Company.

4. AUTOMATIC WATER DISTRIBUTION FLUSHING SYSTEM COMPONENTS

The automatic water distribution flushing system shall be comprised of a self-contained automatic flushing
unit that shall be equipped with a dechlorination tablet feeder that shall hold a minimum of six (6) three­inch ascorbic acid or sodium sulfite tablets. The device shall include a sample quick connect that can be
matted with a portable sample valve. The quick connect shall be protected from contaminants by way of
a protective cap. The device shall feature a protective stainless-steel diffuser screen that shall serve to
diffuse water energy from the water being flushed from the device and shall serve to reduce the potential
that animals, reptiles etc. can nest inside of the device. The device shall be upgradable to include freeze
protection.

5. AUTOMATIC FLUSHING UNIT

The automatic flushing device shall be a single unit consisting of the major components described below:

5.1 Integral Piping and Control Valve – The piping and control valve components shall include the

following:

a. The device’s internal control valve shall be capable of being activated controller powered by

either a single 9-volt battery (Built-In) with the ability to add a second like battery for extended
life, unless equipped with a S.M.A.R.T. management system or a Bluetooth equipped smart
phone (Android or iOS).

b. The control valve shall be a globe valve type design with a straight-through pass cavity (no

internal wall construction inside valve body) capable of passing sand and other debris up to
5/8” in diameter without obstructing the valve’s throat.

c. The unit’s standard internal piping shall be Schedule 80 PVC or Brass.
d. The unit’s internal piping and control valve shall have a recommended operational rating of

up to 200 psi. However, where pressures are likely to be sustained at or above 120 psi a
pressure reducing valve shall be installed in line with the device.

e. Internal piping and control valve shall be capable of being removed from the housing by

means of a quick disconnect, permitting easy maintenance and repairs. All internal piping,
control valve sub-assembly must be completely removable by way of a single point of
disconnect.

SUGGESTED SPECIFICATIONS

HG-1 FLUSHING SYSTEM WITH BUILT-IN
(NODE) or BLUETOOTH PROGRAMMING
CONSTRUCTION

Form 13845 r08-18 page 3 of 6

f. The control valve shall be constructed of a non-corrosive glass-reinforced nylon, or equal, and

shall be fitted with stainless-steel hardware. The valve shall be of the type that can be easily
rebuilt using a single EPDM rubber diaphragm. The valve must be upgradable to a brass
control valve option.

g. The unit shall be supplied with either a standard 2” (inlet size is determined by customer

preference for the site where the flushing device will be located) male NPT threaded water
supply connection.

5.2 Housing
a. The components shall be designed to dissipate the energy and distribute the flow of

pressurized water leaving the water distribution system in a circular pattern inside of the
device’s protective exterior, above-grade, housing and discharging to atmosphere. The
discharged water must be capable of passing through an energy dissipating vented shield at
the bottom of the exterior of the device’s above-ground protective housing. The energy
dissipating shield shall be slotted and capable of preventing intrusion by rodents and reptiles.
The shield shall be constructed of either stainless-steel (recommended minimum gage: 16).

b. The discharged water shall be directed downward, through the energy dissipating shield, onto

a ground-level splash pad directing the flow of water horizontally onto the surrounding area in
a manner that does not promote erosion in adequately prepared areas.

c. The self-contained device shall be supplied with a below-grade bottom-vented base to provide

stability and anti-buoyancy capabilities. The base shall be constructed of high to medium
density Polyethylene or other non-corrosive, high quality, material.

d. The device’s above-grade components shall be constructed of a non-corrosive maintenance-

free material and shall be permanently colored light green to blend with typical residential and
commercial environments unless otherwise specified by the owner. The material shall be
specifically designed for direct exposure to the sun and weather and have a minimum life
expectancy of 15 years.

e. All mounting brackets and hardware shall be stainless-steel, marine grade polyethylene

(minimum thickness of ½-inch), or anodized aluminum.

5.3 System Sampling – The sampling system shall include the following features:
a. The sampling system shall be constructed of copper, stainless-steel, polyethylene, or other

material with equal or greater resistance to bacterial regrowth and be connected with brass or
stainless-steel fittings.

b. The sampling system shall be designed in such a way to reduce the potential for sampling

system contamination by allowing access and inspection of the internal piping compartment
and components without disassembly or depressurization of the sampling system.

c. Connection to the unit’s sampling system shall be by means of a stainless-steel quick

connection valve. The unit’s sampling connection shall be housed in a secure weather-tight

area to minimize contamination of the sampling connection. The sampling connection itself
shall be provided with a protective sanitary cover.

d. Sampling system shall include a quick connect that can only be accessed by use of a portable

sample valve (PSV).

e. The Portable Sample Valve must be removable and feature (check preference) a stainless-

steel sampling tip ___ and/or a polyethylene sample tube ___.

SUGGESTED SPECIFICATIONS

HG-1 FLUSHING SYSTEM WITH BUILT-IN
(NODE) or BLUETOOTH PROGRAMMING
CONSTRUCTION

Form 13845 r08-18 page 4 of 6

5.4 Electrical/Electronic System - The Electrical/Electronic System shall include the following

features and capabilities:

a. Controller must be capable of storing instructions. It shall be either an (Check indicates

preference) (___) integrated, “Built-In”, programmer capable of operating the device’s internal
control valve using a single replaceable 9-volt alkaline battery with the potential for adding a
second like battery; or a Bluetooth-equipped smart phone.

b. The Bluetooth-equipped device must be powered by a single 9-volt Alkaline battery that can

power up to 5,000 on/off events over the life of the battery.

c. The Bluetooth-equipped device must allow for up to 24 flush events daily with durations of

one minute to 24 hours.

d. The Bluetooth controller interface shall be capable of being managed from a maximum

distance of 25 feet (line of sight/no obstructions) by way of a standard Android or iOS smart
phone.

e. The Bluetooth controller interface module must be password protected to prevent

unauthorized operation.

f. The built-in control option must offer a minimum of twelve (12) flushing programmable events

per day. The removable control option must offer a minimum of twenty-four (24)
programmable flush events per day.

g. Be leap-year compatible, automatically accounting for February 29

th

every four years.

h. The built-in option must offer an LCD readout for viewing ease of clock and programming

functions. The removable control option must offer a built-in programming interface with an
inferred connection point that can be programmed with a single handheld controller. The
handheld controller must be capable of programming an unlimited number of like-equipped
devices.

i. The built-in option must offer manual on and off functions with programmable delays (10

seconds or more) to allow operators to move away from the device prior to the start of a water
flush sequence.

j. The built-in option must be secured and water-resistant to a minimum of six (6) feet of

temporary submersion.

k. The built-in option must be constructed using heavy-duty electrical wiring and communication

cables. Installation of unprotected cables and communication cables must not be attached to
metal surfaces where potential chaffing can occur.

l. Use an integrated latching solenoid to operate the control valve. Manufacturer must be able

to readily provide replacement parts for the solenoid and valve.

SUGGESTED SPECIFICATIONS

HG-1 FLUSHING SYSTEM WITH BUILT-IN
(NODE) or BLUETOOTH PROGRAMMING
CONSTRUCTION

Form 13845 r08-18 page 5 of 6

5.5 Winterization
a. As per the local ordinance the unit shall be constructed either with or without a freeze

protection system. One acceptable option is the use of a fully mechanical low-pressure
relief/double check freeze protection system (requiring no additional power source).

Optional Freeze Protection Upgrade:

b. The self-draining, double check valve, freeze protection system has been engineered to

evacuate water remaining within the unit’s stand pipe subsequent to but not during the flushing
process. This system must be designed to prevent the possibility of cross contamination of
the main service distribution line by means of a double check valve installed in the freeze
protection system. This system may not include the use of a spring valve capable of being

activated by outside pressure from ground water standing in the flushing unit’s protective

below grade enclosure.

5.6 Dechlorination (Optional depending on local ordinance)
a. A tablet feeder designed to accommodate

up to twelve 2 5/8th inch sodium sulfite or
ascorbic acid tablets may be installed on
the unit. A portion of the water being
flushed shall be directed through the tablet
feeder in the creation of a concentrated
solution of the dechlorinating agent. The
directly treated, concentrated solution
shall be introduced to the non-directly

treated discharge on the device’s splash

plate resulting in a homogenous mixture
effectively treating the entire discharge.
Depending upon the level of neutralization
required, as many as five tablet feeders
may be installed on a single flushing
device.

SUGGESTED SPECIFICATIONS

HG-1 FLUSHING SYSTEM WITH BUILT-IN
(NODE) or BLUETOOTH PROGRAMMING
CONSTRUCTION

Form 13845 r08-18 page 6 of 6

5.7 Execution
a. Prior to the installation, the drainage patterns for the intended installation location shall be

shall be viewed to ensure that any discharged water will not create hazardous conditions for

pedestrian or vehicular traffic. The selected location’s drainage pattern shall also permit

discharged water to flow away from the automatic flushing valve or be absorbed by the
surrounding soil as prevent pooling.

b. Remove debris that might create uneven pressure on the unit from the bottom of the hole.

Compact the bottom of the hole to minimize settling after installation.

c. Install a 4” lift of non-compacted sand or similar bedding material into the bottom of the hole.
d. Backfill the hole around the automatic flushing valve with clean fill, #57 stone and/or a

combination of other appropriate materials. Backfilling shall be accomplished in 6” lifts. Use a

level to ensure the unit is level after each lift.

e. The area 36” around the automatic flushing valve shall be prepared in order to prevent

erosion.

f. The automatic flushing valve shall be disinfected in accordance with ADH and AWWA

standards.

Water (U.S.) 1.800.423.1323

www.muellercompany.com

[e-mail]

Mueller Canada 1.705.719.9965

www.muellercanada.com
[e-mail]

International 1.423.490.9555

www.mueller-international.com

[e-mail]

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Mueller Co. LLC, its affiliates or other third parties. These products are intended for use in potable water applications. Please contact your Mueller Sales or
Customer Service Representative concerning any other application(s).