FAQ

  • 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

  • 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 18.3.3.1 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

  • Hydrant Security
    • Application
      • Q: How can a high amount of “unaccounted for water” be combated?

        Aside from repairing leaks in the water distribution system, the most obvious step – and Mueller makes the pipe repair products to do this, an often overlooked reason for water loss is pilferage. Installing the Mueller® Hydrant Defender® device on hydrants prone to pilferage can effectively block water theft, and with the added benefit of preventing vandalism and theft of hydrant parts.

      • Q: Does Mueller offer fire hydrant products that prevent contamination of the water system by way of tampering or by accident?

        Yes, Mueller offers a hydrant with a special shoe that incorporates a check valve, the Mueller® Super Centurion 250/HS™. Fire Hydrant resists both accidental and deliberate contamination of the water supply – without affecting normal hydrant operation or maintenance. This self-contained security function is reliable and maintenance-free. Tested to last over 1 million cycles, the check valve is positioned ahead of the hydrant main valve so as not to interfere with normal hydrant maintenance or repair, or with access to water in an emergency.

      • Q: What is the difference between the tamper-proof and tamper-resistant operating nuts?

        The Mueller Tamper-proof Operating Nut is a simple, yet effective option that protects against unauthorized operation, theft of parts and vandal-inflicted damage to the operating and hold-down nuts. A cast-iron cap that spins freely on top of the hydrant bonnet shields the operating mechanism and protects it from would-be vandals. Common tools cannot grip the cap, the operating nut or the specially shaped hold-down nut. The Mueller Tamper-resistant Hydrant Hold-down Nut replaces the existing hold-down nut and surrounds the operating nut, helping prevent unauthorized operation of Mueller Centurion® and Improved Fire Hydrants. The special operating wrench for use with this option may also be used with other hydrants.

    • Dimensions & Sizes
      No FAQs have been added for this sub-category.
    • Installation
      No FAQs have been added for this sub-category.
    • Maintenance
      No FAQs have been added for this sub-category.
    • Operation
      No FAQs have been added for this sub-category.
    • Repair & Replacement
      No FAQs have been added for this sub-category.
    • Testing
      No FAQs have been added for this sub-category.
    • Troubleshooting
      No FAQs have been added for this sub-category.
  • Machines & Tools
    • Application
      • Q: What is the difference between the Mueller® E-5 and D-5 machine?

        Since the machines are very similar in construction, it comes down to deciding which machine has the range needed. The D-5 machine accommodates up to 2” dia. cutters – 3/8” larger than the E-5 machine. Both are rugged machines rated to 500 psi and can be hand or power operated.

      • Q: Which Mueller shell cutters do I use to cut plastic pipe?

        A line of shell cutters with pilot shells is made specifically for plastic pipe (CI O.D. PVC, IPS PVC and PE). These cutters will retain almost all of the chips generated during the cut. Contact your nearest Mueller Distributor or check your catalog for details. The carbide tipped shell cutters can also be used to cut plastic pipe but these cutters will generate a lot more plastic “chips”. Check ID of pipe and shell cutter O. D. to make sure coupon will be retained.

      • Q: Can I use Mueller machines on steam lines?

        No. Mueller machines are designed for water use. Certain machines can be used on pipe containing different types of fluids, but you must check with Mueller Co. (800-423-1323) for compatibility before using this machine on lines containing fluids other than potable water.

      • Q: What is the difference between the C1-36 and C1-36-99002 machines?

        The C1-36-99002 Machine has an eight (8) thread per inch feed screw and the C1-36 Machine has a six (6) thread per inch feed screw. This means the C1-36-99002 machine boring bar will advance slower than the C1-36. This is important when making cuts over 12” in size. The slower feed allows the C1-36-99002 to make cuts through 14” to 24” valves.

      • Q: When should I use a combined shell cutter and tap instead of a combined drill and tap?

        Use a combined shell cutter & tap (CSC&T) when customer is concerned about the amount of chips a CD&T will generate on 1 ¼” thru 2 ½” taps. The combined shell cutter and tap will produce fewer pipe chips than a combined drill and tap. The combined shell cutter and tap will remove a coupon of pipe instead of turning it into chips. The customer may also require a CSC&T so they can inspect the coupon to determine the condition of the interior of the pipe at the point of tap.

      • Q: When do I use the Power Clevis?

        The power clevis is used to control the boring bar movement when working at line pressures above 90 psi.

    • Dimensions & Sizes
      • Q: I noticed there is an “R” and a series of numbers stamped into the outside edge of the flange that attaches to the CL-12 machine body. What does the “R” and numbers mean?

        This means the machine has been repaired. The numbers represent the date the machine was repaired. We keep a record of the repair date code and can provide more information about the repair.

    • Installation
      No FAQs have been added for this sub-category.
    • Maintenance
      • Q: How often should I change the oil in my CL-12 machine?

        A new machine should have its first oil change after ten (10) hours of operation and after each fifty (50) hours of operation thereafter.

      • Q: How often should I change the oil in my C1 machine?

        A new machine should have its first oil change after ten (10) hours of operation and after each fifty (50) hours of operation thereafter.

    • Operation
      • Q: When buying a new Mueller® Drilling or Drilling & Tapping Machine, will the old machine’s tools work?

        Although you should verify such compatibility with your Mueller Sales Person when ordering the machine, in general the following is true: Mega-Lite® Machine cutters are compatible with CL-12 tools C1 Series cutters are compatible with CC tools E-5 and E-4 machine tools are compatible. D-5 and D-4 machine tools are compatible. D and E series cutters are interchangeable, but the adapters are not.

      • Q: What type of oil do I use in the CL-12 machine and where do I check and add the oil?

        Use four pints of EP220 Permagear oil, MUELLER #89347 (1 gallon can), in both the front and rear cases. The machine should be horizontal with the plugs on top when being filled. The front gear case oil plug (end that attaches to the drilling machine adapter) is located on the face of the torque tube (long body) and is a plug with square wrench flats. The rear gear case oil plug is the holder that is used to store the crank handle located under the tray that houses the two indicators. Do not overfill the gear cases. The two gear cases are not connected, so filling one will not fill the other. To check oil, the machine should be horizontal with the plugs 90° from the top and oil should be even with the bottom of the plughole.

      • Q: What type of oil do I use in the C1 machine?

        Model three (3) and earlier, use Mueller lubricant part number 580685 (Amovis 5x). Model four (4) and newer, use Mueller lubricant part number 89347 (EP220 Permagear, non-foaming). The machine should be horizontal with the plugs at the top when being filled. The front (flange end that attaches to the drilling machine adapter) gear case requires four (4) pints of lubricant and the rear gear case requires 1.6 pints of lubricant. These two gear cases are not connected and must be filled separately. DO NOT OVERFILL. To check oil, the machine should be horizontal with the plugs 90° from the top and oil should be even with the bottom of the plughole.

      • Q: Can I use a B-101 boring bar in my B-100 machine?

        Yes, but you will need to use the B-101 friction collar (part #580610) and you will need to change out the feed nut and yoke to the B-101 style (part #580611).