INTERNATIONAL ASSOCIATION OF PLUMBING AND MECHANICAL OFFICIALS IAPMO GUIDE CRITERIA FOR ELECTRICAL OR HIGH-DENSITY MAGNETIC ANTI-SCALE OR WATER CONDITIONING APPLIANCE IGC 91-2009 1. PURPOSE 1.1 The purpose of this standard is to establish generally acceptable criteria for electrical or high-density magnetic anti-scale or water conditioning appliances. Its purpose is to serve as a guide for producers, distributors, architects, engineers, contractors, installers, inspectors and users; to promote understanding regarding design, materials, and the installation; and to provide for identifying electrical or high-density magnetic anti-scale or water conditioning appliances that conform to this standard. 1.2 The provisions of this standard are not intended to prevent the use of any alternate material, provided any such alternate meets the intent and requirements of this document and changes are amended to this standard. 2. SCOPE 2.1 This standard covers electrical anti-scale or water conditioning appliances in nominal pipe sizes from 1/2 in. (12.7 mm) through 3 in. (76.2 mm) and configurations include slip fittings, male nominal pipe threads (MNPT) for plastic and metal fittings and female nominal pipe threads (FNPT) for metal fittings only and high-density magnetic anti-scale or water conditioning appliances. In nominal pipe sizes from 3 in. (76.2 mm) to 16 in. (406.4 mm), flanged connections shall be used with the anode and cathode isolated from each other. This standard covers definitions, general requirements, in addition to general description of materials used and the method of marking and identification. It is not the intent of this standard to rate or verify the effectiveness of these products in reducing or eliminating scale in water piping systems. The effectiveness of these fittings or appliances is beyond the scope of this standard. 3. REFERENCE STANDARDS 3.1 All standards referenced herein shall be the current edition of that standard. ASME B1.20.1 Pipe, Threads, General Purpose (inch) IGC 91-2009 1 of 6
ASSE 1011 Hose Connection Vacuum Breakers ASTM A 53 Pipe, Steel, Bland and Hot-Dipped, Zinc-Coated Welded and Seamless ASTM A 240 Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications ASTM D 1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe Sch. 40, 80 and 120 ASTM D 2564 Solvent Cements for Poly(Vinyl Chloride) (PVC) Plastic Piping Systems ASTM D 3965 Rigid Acrylonitrile-Butadiene-Styrene (ABS) Materials for Pipe and Fittings ASTM F 442 Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Pipe, (SDR-PR) ASTM F 656 Primers for Use in Solvent Cement Joints of Poly(Vinyl Chloride) (PVC) Plastic Pipe and Fittings ASTM F 1498 Taper Pipe Threads 60 for Thermoplastic Pipe and Fittings AWWA D 104 Automatically Controlled, Impressed-Current Cathodic Protection for the Interior of Steel Water Tanks ISA 75.02 Control Valve Capacity Test Procedures ISO 7005-1 Metallic flanges -- Part 1: Steel flanges ISO 7483 Dimensions of gaskets for use with flanges to ISO 7005 NSF 42 Drinking Water Treatment Units - Aesthetic Effects NSF 61 Drinking Water System Components Health Effects UL 969 Marking and Labeling Systems UL 1012 Power Units Other Than Class 2 UL 1310 Class 2 Power Units 4. DEFINITIONS 4.1 Anti-scale conditioning appliances are devices that are reported to reduce or eliminate the restriction and plugging of water piping systems due to the buildup of scale. 4.2 Water conditioning devices condition or treat a water supply so as to change its physical or chemical properties or aid in removing suspended solids by filtration. 4.3 Capacitor-based water treatment systems produce an electrostatic field and operate in conjunction with piping or other containment vessels to form a capacitor. 4.4 Wrap around type high-density magnetic anti-scale or water conditioning appliances are magnetic devices that wrap around the outside of water piping and do not contact potable water. 4.5 Water flowing type high-density magnetic anti-scale or water conditioning appliances are magnetic devices that are connect to the water piping system allowing potable water to flow through the appliance. 4.6 Standard magnets are formed from Ferromagnetic materials (such as iron). Blended material type magnets are form using a combination of other materials (such as ceramic) and ferromagnetic materials. IGC 91-2009 2 of 6
5. GENERAL REQUIREMENTS 5.1 Unless otherwise specified, metallic bodies included as components of electrical antiscale or water conditioning appliances shall be constructed from schedule 40 or heavier A-53 steel pipe. Steel piping shall comply with ASTM A 53. 5.2 Unless otherwise specified, thermoplastic bodied electrical anti-scale or water conditioning appliances shall be constructed from schedule 80 or heavier CPVC piping components for hot and cold water applications or schedule 40 or heavier PVC piping components for cold water applications. 5.3 Unless otherwise specified, the end configurations shall be slip fittings or of pipe thread design with thermoplastic end configurations complying with Section 316.0 of the Uniform Plumbing Code. 5.4 All NPT threaded ends shall comply with ANSI/ASME B1.20.1. 5.5 All electrical components shall comply with the applicable CSA or UL standards. 5.6 Capacitor Units. Capacitor Units shall comply with the testing requirements in Sections 6.1, 6.3, and 6.6 of the standard and are not applicable to the testing requirement in Sections 6.2, 6.4 and 6.5 in this standard. High voltage (higher than 12 volts) capacitor based units shall comply with UL 1012 and low voltage (12 volts or lower) capacitor based unit shall comply with UL 1310. 5.7 All steel pipe shall comply with ASTM A 53. 5.8 All CPVC pipe shall comply with ASTM F 442. All PVC pipe shall comply with ASTM D 1785. 5.9 If this product is intended for the transport of potable water, components in contact with water shall meet the requirements of NSF 61 for non-residential use or Section 4 of NSF 42 for residential use. 5.10 Stainless steel components shall be a minimum Type 304 complying with the requirements of ASTM A 240. 5.11 Copper components shall contain at least 58% copper. 5.12 Flow switch shall comply with the applicable CSA or UL standards. 5.13 ABS components shall be a minimum cell class of 30133 complying with ASTM D 3965. 5.14 Solvent Cement and Primers shall comply with the requirements of ASTM D 2564 and F 656. 5.15 Unions shall be manufactured from schedule 80 PVC complying with ASTM D 1784 having an EPDM O-ring having a Shore A durometer hardness of 70 and an ultimate tensile strength greater than 1500 psi in accordance with ASTM D 2000. Female IGC 91-2009 3 of 6
screwed unions shall also have a molded 400 series stainless steel threaded insert complying with ASTM A 240 and F 1498 when used with a male metal screwed fitting. 5.16 All anode materials shall comply with the requirements of Section 4.2.3.2 in AWWA D104. 5.17 Wrap Around Type High-Density Magnetic Units. Wrap Around Type High-Density Magnetic Units shall comply with the testing requirements in Sections 6.5 and 6.7 in this standard and are not applicable to the testing requirement in Sections 6.1, 6.2, 6.3, 6.4, and 6.6 in this standard. 5.17.1 Water Flowing Type High-Density Magnetic Units. Water Flowing Type High-Density Magnetic Units shall comply with testing requirements in Sections 6.1, 6.3, 6.5, and 6.7 in this standard and are not applicable to the testing requirement in Sections 6.2, 6.4, and 6.6 in this standard. 5.18 Flanges shall be manufactured from Type 304 Stainless Steel complying with ISO 7005-1 having an EPDM gasket in accordance with ISO 7483. 6.1 Leakage Test 6. TESTING REQUIREMENTS 6.1.1 The fitting design shall be qualified by first assembling one of each size fitting to mating test fixture fittings using good plumbing practice including the use of pipe dope or thread sealant on all tapered pipe threads. The assembled test fixture shall then be completely filled with water and shall be hydrostatically pressure tested at a pressure of 160 psi (1103 kpa) at 73 ± 5 F (22.8 ± 2.8 C) for fifteen (15) minutes. The fitting and its connections to mating test fittings shall show no evidence of leakage. 6.2 Voltage Test 6.2.1 Install the water conditioning appliance in accordance with the manufacturer s installation instructions. Using a Handheld Volt Meter, measure the appliance for electrical current when water is flowing through the unit and when water is not flowing through the unit. The appliance shall show no evidence of electrical current when water is not flowing through the unit. 6.3 Pressure Loss Test 6.3.1 Install the water conditioning appliance as shown in figure for the Hydrostatic Pressure Test of ASSE 1011 in a test system equipped with means for accurately measuring the pressure loss across the unit. The pressure measuring device shall comply with ANSI/ISA 75.02. The system shall be adequate to meet 10 gpm. After purging the system of air, the throttling valve shall be closed and then opened slowly until 1 psi pressure differential is reached. The maximum pressure drop at 10 gpm shall not exceed 1 psi for the appliance. IGC 91-2009 4 of 6
6.4 ORP Test 6.4.1 Obtain one 50 mil sample of potable water containing at least 350 parts per million of Total Dissolved Solids and 15 grains of CaCO 3 per gallon and one 50 ml sample of the same water after it has been conditioned by the appliance, which has been installed and operated in accordance with the manufacturer s installation and operational instructions. 6.4.2 Performance Requirements. Allow the samples to sit undisturbed at room temperature for 4 hours. Measure the Oxidation Reduction Potential (ORP) of each sample with an ORP meter. The unconditioned or control sample of water should have a millivolt reading at least 20% higher than the conditioned sample. 6.5 Recirculation Test Internal Use Only 6.5.1 Fill a clean holding tank with 100 gallons of potable water containing at least 15 grains of CaCO 3 per gallon. Using a pump with a flow capacity of at least 4 gallons per minute, pump such water through the operating appliance followed by a 10 micron pleated sediment filter and return such water to the holding tank. Continue re-circulating such water through the appliance and filter for 10 days. 6.5.2 Performance Requirements. Following 10 days of continuous re-circulation, turn off the pump, remove the sediment filter and allow it to air dry. Once the sediment filter is dry, collect the sediment which has been collected from the filter, place a sample of the sediment in a glass dish and apply a solution of muriatic acid. The sample of sediment shall react to the muriatic acid, indicating the presence of CO 3 in the sample. 6.5.3 Concurrent with the test described in Section 7.5.1 in this standard, duplicate the test without the appliance in the recirculation loop. Test any sediment, which may have been collected in the filter. There shall be no reaction to the muriatic acid, indicating an absence of filterable CaCO 3. 6.6 Electrostatic Field Strength Test 6.6.1 For capacitor-based water treatment systems, connect the bare electrode (without chamber) to the high voltage power supply in accordance with the manufacturer s instructions. Make certain that the system is properly grounded. To perform the electrostatic field strength test, turn on the high voltage power supply, and with the dry ceramic electrode exposed to the air (not immersed in water), use the static sensor to measure the electrostatic field that is generated from the electrode. To operate the static sensor meter 1, hold the meter at the prescribed distance from the surface of the electrode, as indicated by the meter s focusing lights. Read the electrostatic field strength from the numeric display on the meter. Meter reading should be in excess of 5 kilovolts. To repeat the test, turn the power supply off, discharge the ceramic electrode by touching it with a ground wire, turn the power supply on again, and repeat the measurement. 6.7 High-Density Magnetic Flux Test 6.7.1 Using a handheld Gauss meter on an uninstalled unit, measure the strength of magnetic IGC 91-2009 5 of 6
flux density within the unit. The meter shall be tested at a location at the inside of the water flow section in a dry condition in room temperature conditions. 6.7.2 Gauss meter readings shall be: Type A (Wrap-around Type): minimum 4,000 Gauss Type B (Water Flowing Type): minimum 7,000 Gauss (for Std Mat l Type Magnet) minimum 400 Gauss (for Blend Mat l Type Magnet) 6.7.3 The leakage of the magnetic flux towards outside of the device shall be kept at the minimum level. Gauss meter readings shall be: Type A (Wrap-around Type): maximum 300 Gauss Type B (Water Flowing Type): maximum 100 Gauss 7. MARKING AND IDENTIFICATION 7.1 Each appliance shall be permanently marked or labeled with the following: (a) (b) (c) Manufacturer's name or trademark; Model number; and Size. 7.1.1 Label shall comply with the requirements of UL 969. Adopted: 9/94 Revised: May 2004, October 2004, May 2005, October 2005, November 2005, January 2006 April 2008, October 2009 1 Static Sensor, Model #718 manufactured by 3M Electronic Handling and Products Division Austin, TX is currently used for this test. IGC 91-2009 6 of 6