INTERNATIONAL ASSOCIATION OF PLUMBING AND MECHANICAL OFFICIALS IAPMO GUIDE CRITERIA FOR RECLAIMED WATER CONSERVATION SYSTEM FOR FLUSHING TOILETS

Transcription

1 INTERNATIONAL ASSOCIATION OF PLUMBING AND MECHANICAL OFFICIALS IAPMO GUIDE CRITERIA FOR RECLAIMED WATER CONSERVATION SYSTEM FOR FLUSHING TOILETS IAPMO IGC a 1. PURPOSE 1.1 The purpose of this standard is to establish a generally acceptable standard for a reclaimed water conservation system for flushing toilets. Its purpose is to also serve as a guide for producers, distributors, architects, engineers, contractors, installers, inspectors and users; to promote understanding regarding materials, manufacture; and to provide for identifying reclaimed water conservation system for toilet flushing that conforms to this standard. 1.2 The provisions of this standard are not intended to prevent the use of any alternate material or method of construction, 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 the minimum requirements for protection of public health and safety associated with reclaimed water conservation at the toilet level, the materials in the construction of a reclaimed water conservation system for toilet flushing and to prescribe the minimum testing requirements for the performance of the reclaimed water conservation system for flushing toilets, together with methods of marking and identification. 3. REFERENCE STANDARDS 3.1 All standards referenced herein shall be the current edition of that standard. API 542 API 543 ASME A /CSA B125.1 ASME A /CSA B125.2 ASTM A 240 Grouped Motor Controller Specification Low Voltage Medium Voltage Motor Controllers Plumbing Supply Fittings Plumbing Waste Fittings Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Application IGC a Reclaimed Water System page 1 of 5

2 ASTM C 1440 ASTM D 1784 ASTM D 3350 ASTM D 4101 ASTM D 4673 ASTM F 409 CSA B137.1 CSA B CSA C22.2 #14 CSA C22.2 #205 IAPMO PS 52 IAPMO PS 119 UL 83 UL 508 UL 778 UL 817 UL 935 UL 1063 Mechanical Couplings Using Thermoplastic Elastomeric (TPE) Gaskets for Joining Drain, Waste, and Vent (DWV), Sewer, Sanitary, and Storm Plumbing Systems for Above and Below Ground Use Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC) Compounds Polyethylene (PE) Plastics Pipe and Fittings Material Polypropylene (PP) Injection and Extrusion Materials Acrylonitrile-Butadiene-Styrene (ABS) Plastics and Alloys Molding and Extrusion Materials Thermoplastic Accessible and Replaceable Plastic Tube and Tubular Fittings Polyethylene Pipe, Tubing and Fittings for Cold Water Pressure Services Polypropylene (PP-R) Pipe and Fittings for Pressure Applications Plumbing Products and Materials Industrial Control Equipment Signal Equipment Sump and Sewage Ejector Tanks Water Energized Sump Pump Thermoplastic-Insulated Wires and Cables Industrial Control Equipment Motor-Operated Water Pumps Cord Sets and Power-Supply Cords Fluorescent-Lamp Ballasts Machine-Tool Wires and Cables 4. GENERAL REQUIREMENTS 4.1 Material. All plastic components, fittings and tubing shall comply with the requirements of ASTM D 3350 and CSA B137.1 for polyethylene, ASTM D 4101 and CSA B for polypropylene, ASTM D 4673 for Acrylonitrile-Butadiene-Styrene (ABS), ASTM D 1784 for Poly (Vinyl Chloride) (PVC) or ASTM C 1440 for Thermoplastic Elastomeric (TPE). 4.2 Wire. Copper wire shall be a minimum 12 gauge and shall comply with UL 83 or UL Water pump shall comply with the requirements in UL Stainless steel components shall be a minimum 304 type complying with the requirements in ASTM A 240. IGC a Reclaimed Water System page 2 of 5

3 4.5 Plumbing fixture waste fittings shall comply with the requirements of ASME A /CSA B125.2 or ASTM F Sump pump shall comply with the requirements in IAPMO PS 52 or IAPMO PS Electrical Features. Electrical features shall comply with one of the following requirements: a) Low voltage features shall comply with Section 4.13 of ASME A /CSA B125.1; or b) High voltage features shall contain: - A liquid level float switch shall comply with API 542 or API 543; - A controllers shall comply with the requirements in UL 508; and - A power supply cord shall be a minimum 18 gauge, 120 volt and shall comply with UL O-rings. O-rings shall be of EDPM Rubber complying with ASTM D TESTING REQUIREMENTS 5.1 Hydrostatic Pressure Test. Connect test sample in accordance with the manufacturer s installation instruction and shall be hydrostatically pressure tested at a pressure of 5 psi at 120 ± 3 F for 15 minutes. After 15 minutes, inspect test assembly (including the fixture fittings such as the lavatory and/or shower) for any visible cracks or leaks Performance Requirement. Test sample shall show no evidence of cracks or leaks. 5.2 Operation Tests. System shall function properly under all of the following scenarios: Reservoir Completely Full Test. With the reservoir completely filled, flush the water closet and allow the tank to refill. This constitutes one cycle. Repeat process for 500 times and collect water samples from reservoir after each 50 cycles 1. Observe for: 1. Any signs of leakage or cracks within the system; 2. Signs of breaching air gap between reclaimed water and fresh water; 3. Disturbance in pilot valve backflow prevention mechanism; and 4. Incomplete cycle Performance Requirement. Any signs of leakage or cracks in the system, signs of breaching air gap between reclaimed water and fresh water, disturbance in pilot valve backflow prevention and incomplete cycle shall result in failure of test. Chlorine Disinfection System: All water samples shall indicate a chlorine residual level of greater than 1 parts per IGC a Reclaimed Water System page 3 of 5

4 UV / H202 Disinfection System 2 : All water samples shall indicate a H202 residual level of greater than 1 parts per Reservoir Half Full Test. With the reservoir half filled, flush the water closet and allow the tank to refill with using a mixture of fresh water and water from reservoir. This constitutes one cycle. Repeat process for 500 times and collect water samples from reservoir after each 50 cycles 1. Observe for: 1. Any signs of leakage or cracks within the system; 2. Signs of breaching air gap between reclaimed water and fresh water; 3. Disturbance in pilot valve backflow prevention mechanism; and 4. Incomplete cycle Performance Requirement. Any signs of leakage or cracks in the system, signs of breaching air gap between reclaimed water and fresh water, disturbance in pilot valve backflow prevention and incomplete cycle shall result in failure of test. Chlorine Disinfection System: All water samples shall indicate a chlorine residual level of greater than 1 parts per UV / H202 Disinfection System 2 : All water samples shall indicate a H202 residual level of greater than 1 parts per Reservoir Empty Test. Flush water closet until reservoir fails to fill water closet. Once accomplished, flush water closet and allow tank to refill with fresh water. This constitutes one cycle. Repeat process for 500 times. Observe for any signs that the water closet is not fully completing a cycle Performance Requirement. Any signs of an incomplete cycle shall result in failure of test. 5.3 Reclaimed Water Backup Test. Fill the water closet tank with fresh water and the reservoir with reclaimed water. Open water faucet to normal flow rate and allow reclaimed water into sink and through lavatory drain for 15 minutes. Verify that system is operating to allow water to drain down waste system and not overflowing into reservoir or water closet tank Performance Requirements. Any signs of overflowing into reservoir or water closet tank shall result in failure of test. IGC a Reclaimed Water System page 4 of 5

5 6. MARKINGS AND IDENTIFICATION 6.1 The reclaimed water system shall be permanently and legibly marked with the following: (a) Manufacturer s name or trademark; and (b) Nominal size. Adopted: December 2004 Revised: April 2005, February 2006, May 2006, October 2006, February 2009, October Ultraviolet disinfection system shall comply with UL 935 and CSA C22.2 No UV disinfection system shall be rated by the manufacturer for residential use or higher and be capable of delivering a minimum dosage of 30 mj/cm 2 in accordance with the manufacturer s specifications. 2 When disinfecting system is set on a timer to perform disinfection, water samples shall be taken every 5 hours during the testing period in lieu of the 50 cycles. If testing is stop for the day, a sample shall be taken once testing resumes and then again 5 hours later. IGC a Reclaimed Water System page 5 of 5