• About Mueller Co.
    • Overview
      • Q: Who makes Mueller® Products?

        We make our products in our own plants here in the U.S. Brass goods – Brass foundry and manufacturing in Decatur, Illinois Fire Hydrants – Iron foundry and manufacturing in Albertville, Alabama Gate Valves – Iron foundry and manufacturing in Chattanooga, Tennessee Stainless Steel Pipe Repair Products – Manufacturing (including stainless steel fabrication and rubber molding) in Cleveland, Tennessee Butterfly Valves – Manufacturing in Aurora, Illinois (castings from our iron foundry in China)

      • Q: Who owns Mueller Co.?

        Mueller Co. is a wholly owned subsidiary of Mueller Water Products, Inc. Headquartered in Atlanta, GA, Mueller Water Products manufactures and markets products and services that are used in the transmission and distribution of safe, clean drinking water and in water treatment facilities. The Company's broad product portfolio includes engineered valves, fire hydrants, pipe fittings, water meters and ductile iron pipe, which are used by municipalities, as well as the residential and non-residential construction industries. Mueller Water Products operates primarily through two segments: Mueller Co. and Anvil. The Company's common stock trades on the New York Stock Exchange under the ticker symbol MWA. For more information about Mueller Water Products, Inc., please visit www.muellerwaterproducts.com.

      • Q: How long has Mueller Co. been in business?

        Mueller Co. was founded in Decatur, Illinois in 1857, making it more than 150 years old. To read more about the company’s history, or to see some of our milestones, please visit: http://www.muellercompany.com/about/history.aspx

  • Automatic Flushing Systems
    • Operation
      • Q: How does the Hydro-Guard SMART Flushing System read chlorine levels?

        The Hydro-Guard SMART Flushing System utilizes an ATI Chlorine analyzer (Free Chlorine or Total Chlorine) to actively monitor Chlorine levels at the installation site.  The readings recorded by the ATI analyzer are then translated and logged by the logic of the Hydro-Guard SMART Systems controller.  The logic will determine, based on the owner/operator’s settings, whether or not the recorded readings are within tolerance.  If the water quality condition, in this case Chlorine, is out of tolerance the device will initiate a flush sequence.  Water will continue to flush from the Hydro-Guard until the water quality reading from the Chlorine analyzer is above the set points programmed by the owner/operator.  At this time the water will stop flushing.


        The logic of the Hydro-Guard SMART controller can be programmed by the owner/operator to monitor various water quality conditions, in addition to Chlorine.  The device can measure temperature, pH, turbidity, flow, pressure, TOC, DOC, conductivity, etc.  To monitor these other conditions it is necessary to order additional analyzers and/or probes (all of which are available from Mueller and are delivered with the SMART System as a “plug and play”). 


        NOTE:  The Hydro-Guard SMART System is expandable; therefore, an owner/operator can budget for additional water quality monitoring equipment that can be added to the original device as budgets will allow.


        The logic of the SMART Flushing System also allows the owner/operator to program a maximum run time and a minimum off time for the flushing sequence.  The maximum run time can be set so that no matter what the water quality condition at the time this setting is reached the flush event will stop.  The minimum off time setting can be programmed so that once the flush sequence stops the unit will remain at rest for a period of time determined by the owner/operator.  Both of these features can be bypassed by the owner/operator.



      • Q: Does it periodically flush to get fresh water to the unit to sample?

        The Hydro-Guard SMART Flushing System requires that a constant flow of water pass through the flow cell of the ATI Chlorine analyzer.  This flow is estimated at just 10 gallons per hour.



      • Q: What is the typical flow rate of the Hydro-Guard SMART Flushing System?

        The typical flow rate of the Hydro-Guard SMART Flushing System depends on the water pressure at the installation site.  For example, if the sustained pressure at the installation site is 75 psi, the flow rate will be approximately 155 gallons per minute. 



      • Q: Are Installation drawings provided with the Hydro-Guard SMART Flushing System?

        Installation and wiring diagrams are provided to customers purchasing the Hydro-Guard SMART Flushing System, as are owner manuals for the overall system and every major component used in construction of the device (i.e., ATI Chlorine Analyzer; Double Check Valve*; combination Flow Meter/Control Valve*; pH, temperature, turbidity, pressure, etc., probes and analyzers; and any other specified analyzer equipment).


        * Optional equipment



      • Q: What are the various communication options for the Hydro-Guard SMART Flushing System?

        Communication Options: 

        Hydro-Guard SMART Flushing System with Ethernet Port on PLC

        This option would allow you to have an operator visit the site and connect directly to the unit.  Via direct connect, you can upload programming and download data logs for the chlorine levels, temperature, pH, turbidity, pressure, and/or flow (depending on what features you wish to have included on the device).


        This option does not require any additional equipment of cost.


        This option does not require a communication service plan with a third-part service provider


        Hydro-Guard SMART Flushing System with Bluetooth Communication

        This option would allow you to have an operator visit the site and connect remotely to the unit from within 300’ (line of sight).  Via the BlueTooth connection, you can upload programming and download data logs for the chlorine levels, temperature, pH, turbidity, pressure, and/or flow (depending on what features you wish to have included on the device).


        This option does not require a communication service plan with a third-part service provider.



        Hydro-Guard SMART Flushing System with Cellular Communication

        This option would allow you to connect remotely to the unit from within via GSM or CDMA cellular machine to machine service.  Via the cellular modem, you can upload programming and download data logs for the chlorine levels, temperature, pH, turbidity, pressure, and/or flow (depending on what features you wish to have included on the device) remotely from anywhere, provided cellular communication is available.  


        This option does require that the owner/operator contract with a third-party vendor for cellular service (i.e., AT&T, Verizon, T-Mobile, Sprint, etc.).


        This option will allow the owner/operator the ability to receive SMS text messages and/or email alerts from the Hydro-Guard SMART Flushing System for condition alerts.



      • Q: For cold climate customers, what is the benefit of purchasing a Hydro-Guard SMART All-In-One Flushing System design versus adding SMART technology to an HG-4?

        Pros for HG-4 SMART:

        This design would allow you to have a bury depth of 36” to 108” on the flushing component of the device.


        Cons for the HG-4-SMART:

        Requires two above ground pedestal enclosure; the enclosure with the chlorine analyzer would need to be heated.


        Requires a ¼” water line be run to the outside of the in-ground PVC protective sleeve of the HG-4, as well as electrical conduit for the power lines.


        Construction costs will likely be higher with this design than the All-In-One design due to the complication of the installation and the extra enclosure.



        Pros for HG-7 SMART All-In-One:

        Flush device and electronics are all in a single (33” or 60” tall enclosure); easy access.


        Both sides of enclosure—water and electric—are heated; heat tape can be added to the piping and valve to give an extra level of protection.


        Recommend adding flushing on water temperature by way of a temperature sensor to give a third level of redundancy to protect the water lines from freezing.


        Use of the single enclosure, seated on a 4” high concrete pad (by others; design drawings provided by Mueller) will give an added layer of protection for the piping located directly below the enclosure.


        Click here to learn more about SMART flush management options. 

      • Q: Is the Hydro-Guard HG-6 battery operated?

        The Hydro-Guard HG-6 is battery powered.  The device is capable of being programmed by either a built-in controller or one that is removable.  The built-in style controller utilizes a 9-volt alkaline battery to power the HG-6.  The removable (requires the use of a handheld controller) uses a 9-volt lithium battery.  Typical battery life Is between six months and one year, depending upon how often the device is scheduled to turn on and off flush events.

      • Q: Can the HG-6 be connected to SCADA?

        The short answer to this question is no; however, if the HG-6 were managed by Mueller’s Hydro-Guard SMART Monitoring and Flush Management System then the HG-6 could communicate with SCADA.  For more details on the Hydro-Guard SMART Monitoring and Flush Management System please see the Mueller animated video for this product.

      • Q: Can you measure flow and chlorine from the Hydro-Guard HG-6?

        You can measure flow by inserting a flow meter between the hydrant and the HG-6. The HG-6 features a swivel adapter that will allow it to swivel onto the outlet of a 2-inch meter. The device is typically 'stand-alone' with no communication capabilities; however, it can be coupled with the Hydro-Guard S.M.A.R.T. Monitoring and Flushing Management System that allows it to capture and relay data related to chlorine, temperature, pH, turbidity, flow, and pressure. Additionally, the Hydro-Guard S.M.A.R.T. Monitoring and Flushing Management System the HG-6 has the ability to flush on a wide variety of water quality parameters, including chlorine, temperature, pH, and turbidity (depending on what sensors and/or analyzers are incorporated with the Hydro-Guard S.M.A.R.T. Monitoring and Flushing Management System.)

      • Q: Can the fire department still access the hydrant when the HG-6 is mounted to the hydrant for water quality flush management?

        Yes. The Hydro-Guard HG-6 is only attached ot a single nozzle. The remaining nozzles are still available for use. The hydrant is live when the HG-6 is being used for flushing; therefore, the fire department personnel will need to turn off the hydrant prior to attempting to remove the nozzle caps.  Once the hydrant is turned off and the caps removed, the fire department can remove the HG-6 by cutting any locks used to lock it to the hydrant. If they prefer, they can utilize the available nozzles and leave the HG-6 in place. If the HG-6 were to attempt to go into a scheduled flush event during the time of use by the fire department the device would likely not activate due to the flow being drawn from the other nozzles. 

        In the event the HG-6 was flushing at the time a fire hydrant were to be put in to service for fire fighting the fire department personnel will need to turn the hydrant off; remove the other nozzle caps; attached their hose; and charge the hydrant. The HG-6 may attempt to turn on; however, the low pressure at the HG-6 will likely prevent the device from operating. In the event the device did run during fire flow from the other nozzles the demand on the line from the HG-6 should have a minimal effect on the flow from the hydrant’s other nozzles.

  • Fire Hydrants
    • Application
      • Q: How can hydrants be used to flush new construction water mains?

        Start with the first hydrant nearest where the new main connects into the system, and work toward the farthest hydrant. Open the first hydrant as fast as possible until fully open, and allow it to run for five minutes, then close it fully. Do this on successive hydrants until the entire system of pipes has been flushed.

    • Dimensions & Sizes
      • Q: How to read hydrant pumper/hose nozzle thread gauges?

        The first number in the code is the number of threads per inch. The last three digits are the pitch diameter as demonstrated in this example: 60454 – 6 threads per inch with a pitch diameter of 4.54.

    • Installation
      • Q: When installing a fire hydrant with connection restraint, how can having bolts underneath the pipe where they are hard to reach be avoided? Instead of using a standard MJ connection with an add-on bolted restraint system, which can leave several bolts out of reach underneath the pipe, use the Mueller® AquaGrip® system, which includes an MJ-type connection and pipe restraint without any bolts underneath the pipe. Plus, the AquaGrip systems involves far fewer bolts to tighten when it’s installed.
      • Q: What is the easiest way to install a hydrant when the water main is very deep in the ground? The Mueller® Vertical AquaGrip® Hydrant allows the use of any length of standard ductile iron pipe to be used to extend from the hydrant shoe directly down to the main’s level. A companion AquaGrip Elbow can be used at the lower end of the DI pipe to make the 90º turn for the run to the main. Using the vertical AquaGrip hydrant also allows one standard bury depth to be stocked for use with any main depth in the system.
      • Q: What is the maximum recommended distance (or spacing) between a fire hydrant to a home or residence?

        NFPA sets the guidelines which govern the spacing for private and recommended spacing for public water systems.  Most engineers will follow the guidelines set forth by NFPA but with public systems they set their own rules and regulations. NFPA 1, Section says the maximum spacing for residential lots 20,000 square feet or larger should be 1,000 ft; 750 feet for residential lots of less than 20,000 square feet; and 500 feet for townhomes and apartments. For more information, please visit: http://my.firefighternation.com/forum/topics/fire-hydrant-spacing?q=forum/topics/fire-hydrant-spacing.

    • Maintenance
      No FAQs have been added for this sub-category.
    • Operation
      • Q: How many turns are required to open a Mueller fire hydrant?

        17-1/4 turns on all Centurion hydrants.

    • Repair & Replacement
      • Q: How can the main valve of a hydrant be broken loose when it cannot be removed with the seat wrench?

        Such a situation can occur if the hydrant has been left idle for many years without annual exercise, or if the main valve is brass and it is threaded directly into an iron mounting. Mueller hydrants have brass-on-brass main valve mountings to help avoid corrosion that can occur with brass-on-iron. For a main valve assembly that cannot be loosened using a seat wrench, try pumping out all accumulated water, pour in one to two liters of a cola soft drink, and let it soak – overnight might be necessary.

      • Q: When removing the bonnet from a Mueller® hydrant, what’s the easiest way to avoid clipping or disturbing the stem O-rings?

        Placing a special brass sleeve, part number A-368, made for this purpose over the stem threads before removing the bonnet will not only protect the stem O-rings, it also retains the oil in the reservoir and keeps it from running down into the hydrant barrel.

      • Q: What parts are required to convert a Mueller fire hydrant from one bury depth to another bury depth?

        A-31: Lower Stem, A-32: Lower Barrel, A-27: Safety Flange Gasket, A-38: Drain Ring Gasket

      • Q: What parts are required to change Super Centurion 200 or Centurion operating nut from open left to open right or visa versa?

        A-1: Operating nut (specify size, shape, and opening direction), A-2: Weather cap – Hydrants 1987 or earlier, A-4: Hold down nut – Hydrants 1987 or earlier, A-84: Hold down nut – 1988 or later, A-8: Bonnet (Prior to 1988 Centurion Hydrants did not have a directional arrow cast on the bonnet to indicate the opening direction. Instead, it was indicated on the weather cap of the hydrant. On Centurion 200 hydrants, the arrow is cast on the bonnet.), A-11: Upper Stem (Specify year and valve opening size.)

      • Q: What parts are required to change from one size operating nut to another?

        Specify thread gauge and order the following: A-15: Pumper Nozzle Gasket, A-17: Pumper Nozzle Cap (Specify size and shape of operating nut.), A-19: Hose Nozzle Gasket, A-21: Hose Nozzle Cap (Specify size and shape of operating nut.), A-1: Operating Nut (Specify size, shape, and opening direction.), A-311: Operating Wrench (Specify size and shape.), A-22: Cap Chain w/Ring, A-23: Chain Hook(s)

      • Q: What parts are required to convert size of Mueller pumper nozzle?

        Specify size of pumper nozzle and thread gauge and order the following: A-13: Nozzle Lock; A-14: Pumper Nozzle; A-15: Pumper Nozzle Gasket; A-16: Pumper Nozzle O-ring; A-17: Pumper Cap (Specify size and shape of operating nut.); A-22: Cap Chain w/Ring; A-23: Chain Hook(s)

    • Testing
      • Q: How can leakage during a service line pressure test at 150-200 psi be best avoided?

        Many systems still specify the use of ground key valves in service lines, which are only rated to 100 psi. Testing new lists at 200 psi, even 150 psi push these valves to their limit and sometimes leakage can cause a test failure. Using Mueller 300® Ball Valves, which are rated at 300 psi can help assure successful testing. Mueller® Oriseal® Valves are plug style valves with O-ring seals, and are rated at 175 psi, and offer an alternative. When using ground key valves, it is helpful to rotate or “cycle” the key to redistribute the grease when installing the valve. Never tamper with the nut on the bottom of the key, as in Mueller valves, this nut is factory tightened to a precise torque, and loosening it can change the valve’s pressure holding capability.

    • Troubleshooting
      • Q: When a hydrant is hard to open, what can be done?

        First, make sure the hydrant is well lubricated – if it’s a Mueller® hydrant made 1954 or after, this is easily done by removing the oil fill plug and adding oil if necessary according to hydrant maintenance instructions. If lubrication isn’t the issue, it could be the hydrant has been over tightened and the stem bent. In this case, the stem will have to be replaced. If the hydrant is old or has not been exercised in sometime, corrosion or build up of deposits in the main valve could be a problem in which case, the main valve will have to be serviced. If it is an especially old hydrant, over fifty years old for instance, sometimes the best solution is to replace it.

      • Q: A fire hydrant or a gate valve isn’t working. Where do we start?

        Consult our fire hydrant and gate valve troubleshooting guides for a step by step process to find and fix most problems: http://www.muellercompany.com/resources/downloads/Default.aspx?category=bulletins _amp_ miscellaneous