Plans amd spec on plumbing - Orono Senior Housing

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Orono Senior Housing Plumbing Plan No. PLB1106-00212 August 26, 2011 Page 3 Fire sprinkler systems in which corrosion inhibitors or other chemicals may be introduced either directly or by pumper connections require a reduced pressure zone (RPZ)backflow preventer on the public water supply. Local jurisdictions may require additional backflow protection. Please contact the local water purveyor for information concerning their requirements. 12. The installation of reduced pressure zone backflow preventers is permitted only when periodic testing is done by a trained backflow preventer tester acceptable to the administrative authority. Testing intervals shall not exceed one year, and records must be kept. All devices must be tested after initial installation to assure that debris from the piping installation has not interfered with the functioning of the device. The devices shall be overhauled at least once every five years. The installation of new backflow preventers must be at least 12 inches, but not more than 6 feet above the finished floor or ground level. 13. Water supply connections to fixtures or equipment which have submerged inlets, or inlets below the spill line of the fixture or equipment, must be provided with an air gap arrangement, approved backflow preventer or backflow preventer assembly as specified in Minnesota Rules, part 4715.2000 and part 4715.2010. This shall include hand-held shower sprays, clothes washers,the coffee maker, and the ice maker. 14. The water softener shall be provided with a bypass valve which will permit the equipment to be serviced or removed without the need for shutting off the water service completely(see Minnesota Rules, part 4715.5200). 15. The water service line and fire hydrants must be installed at least 10 feet horizontally from any manhole, catchbasin, or the sewer forcemain(see Minnesota Rules, part 4715.1710, subpart 3). This isolation distance must be measured from the outer edge of the pipe or hydrant and the outer edge of the contamination source. 16. Reinforced concrete pipe must meet ASTM C76(see Minnesota Rules,part 4715.0540). p038 17. Draintile pipe which is directly connected to the storm sewer system is classified as storm sewer. Since all portions of storm sewer located within 10 feet of the water service must be tested,the piping located within 10 feet of the new water service must be hard piped, relocated, or removed. It must be verified that all draintile inlet elevations to the catch basins are above the storm sewer outlet elevations. 18. Cleanouts must be provided at intervals not to exceed 100 feet for sanitary sewers (see Minnesota Rules,part 4715.1010). Cleanouts may be placed at greater intervals in the forcemain if the owner retains equipment capable of cleaning the forcemain over the maximum distance proposed between cleanouts. Specifications for the owner-retained cleaning equipment must be provided to the city of Orono prior to installation of the forcemain. Alternately,the owner may contract with a cleaning company retaining such equipment. A copy of the contract must be provided to the city of Orono indicating the capabilities of the cleaning equipment prior to installation of the sewer. 19. Each horizontal drain branch, including floor drain branches, shall be provided with a cleanout at its upper terminal with the following exceptions(see Minnesota Rules, part 4715.1000): a. A fixture trap or a fixture with an integral trap, readily removable without disturbing concealed piping, may be accepted as a cleanout equivalent for this purpose. b. A floor drain cleanout may be omitted if the floor drain or fixture branch line is less than 5 feet in length. c. Floor drains used for shower drains, recessed slop, or similar receptors may have the full-sized cleanout installed on the individual vent pipe serving the fixture or on the fixture.