Safe Drinking Water Act: This product contains leaded bronze and is not intended for applications anticipated for human consumption. More Information

Many people buy or make their own distilled water. In areas where the water is contaminated with harmful substances, due to the natural environment or a natural disaster, drinking distilled water can keep people healthy. If people do not like the taste of the water in an area due to the dissolved minerals that give it a distinctive taste, they may prefer the more neutral taste of distilled water.

Series 909RPDA Reduced Pressure Detector Assembly Backflow Preventers are designed to prevent the reverse flow of fire protection system substances from being pumped or siphoned into the potable water supply. The 909RPDA incorporates a meter to detect ground leaks and unauthorized illegal taps, greatly reducing annual water expenses. It consists of a coated cast iron body using ArmorTek™ coating technology for advanced corrosion resistance, body with stainless steel trim, bronze gate valves, a pressure-differential relief valve, shutoff valves, and bronze ball-type test cocks. Series 909RPDA provides maximum flow at low pressure drop utilizing the air-in/water-out design principle for protection during emergency combined backsiphonage and backpressure conditions. Maximum Working Pressure: 175psi (12.06 bar). The coating on this backflow assembly uses ArmorTek™ technology to resist corrosion due to microbial induced corrosion (MIC) or exposed metal substrate. Features: Replaceable bronze seats, Modular design facilitates easy maintenance and assembly, Unique two-channel relief valve provides maximum capacity during emergency conditions and stops potential backflow using air-in/water-out principle, Provide detection point for costly water leaks and illegal taps, The valve body shall utilize a coating system with built in electrochemical corrosion inhibitor and microbial inhibitor.

Tap water is not distilled (SF Fig. 2.9 A). Most public tap water has chlorine. Chlorine is used to kill microbes in the water. Public tap water may also have other minerals intentionally dissolved in it, like fluoride, which prevents tooth decay. In some areas, tap water comes directly from wells and is untreated. The mineral composition of well water varies from place to place and gives water from different areas their distinctive tastes (SF Fig. 2.9 B).

10 In Cast Iron Reduced Pressure Detector Assembly Backflow Preventer, Domestic OSY Shutoff, Cubic Feet Meter, Epoxy Coated Using ArmorTek Technology

Prop 65 Warning: WARNING This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. More Information

Exploring Our Fluid Earth, a product of the Curriculum Research & Development Group (CRDG), College of Education. © University of Hawai‘i, . This document may be freely reproduced and distributed for non-profit educational purposes.

SF. Fig 2.9. (B) This Colorado fountain has a thick layer of minerals down its side. The minerals were dissolved in the water and remain after the water has evaporated.

Seawater is a mixture of many different substances. Some of these substances can be observed when the water in seawater evaporates and leaves behind salt. Water, H2O, is a pure substance, a compound made of hydrogen and oxygen. Although water is the most abundant substance on earth, it is rarely found naturally in its pure form. Most of the time, pure water has to be created. Pure water is called distilled water or deionized water. In distilled water all of the dissolved substances mixed in water have been removed by evaporation. As water evaporates, it distills, or leaves the salt behind. The pure evaporated water is collected and condensed to form distilled water.

Distilled water can be good for people, but they can have too much of a good thing. It is possible to overhydrate, or have too much water in your body. Although human bodies are mostly water, it is important to maintain the correct balance of water and other substances. When athletes sweat, they lose both water and salt (SF Fig. 2.10 A.). If an athlete drinks too much distilled or tap water after sweating heavily, they may throw off the balance of water and salts in their body. This affects the ability of their bodies to function properly. In rare cases, if an athlete has consumed too much distilled or tap water, the water and salt imbalance is too great and the athlete can die. This is the reason why serious athletes drink sports drinks that have a balance of water, salts, and sugars to keep them properly hydrated (SF Fig. 2.10 B). Most people can get the proper balance of water and salts through a normal diet and do not need to drink sports drinks.