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This 3/4 inch bronze union elbow is used in steam and hot water systems
glycol anti-freeze and temperatures up to 240 degrees F in heating systems and methanol based anti-freeze solutions in ground-source heat pump loops
backflow preventers and similar controls from foreign matter
The surfaces to be taped should be clean and dry
4 IN No hub waste
Watts 957-DOSY-FS 3 - Part of the 957 Series R304 Detectable Warning Surfaces This 3/4 inch bronze unionThis 3 inch reduced pressure zone assembly backflow preventer help stop the reverse flow of liquids due to backpressure or backsiphonage, where potential health hazard exists. This extremely compact and lighter than a traditional designed assembly is approved for horizontal installation as long as the backflow assembly is installed in accordance with the direction of the flow arrow. This assembly consists of a stainless steel body with a quick access
