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GENERAL MECHANICAL MATERIALS AND METHODS Section 15050 15-1207 4. Style "Fire Rated" where required. 2.03 ROOF FLASHING: A. Flashings in metal deck or membrane type roofing: 1. Flashing for penetrations of the roof for mechanical items such as flues, ducts, and pipes will be furnished and installed under other sections of these specifications. The work of this section shall include layout, sizing, and coordination of penetrations required for the mechanical work. 2. Furnish and install counterflashings above each flashing required in the mechanical work. Flues and ducts shall have 24 -gauge galvanized sheet metal storm collar securely clamped to the flue or duct above the flashing. 3. Sewer vents and other piping extending through roof structure shall have flashing provided and installed as part of the roofing work. This contractor shall coordinate his Work accordingly. 2.04 DIELECTRIC UNIONS: A. Furnish and install dielectric unions at all locations described herein, whether shown on Drawings or not, and except as noted herein. Construct couplings and flanges so that the two pipes being connected are completely insulated from each other with no metal -to -metal contact. Heavily line the couplings with a hard, insulating, phenolic plastic threaded in standard pipe sizes. Make up the flanges with insulating components consisting of a hard, phenolic gasket, bolt sleeves, and bolt washers. Supplement the insulating gasket with neoprene faces to form a seal. B. Acceptable Manufacturers: 1. Watts Regulator Co. 2. Eclipse, Inc. 3. Perfection Corp. 2.05 THERMOMETERS: A. General: 1. Thermometers shall be furnished at all locations shown on the Drawings and in accordance with these specifications, whether shown on the Drawings or not 2. All thermometers, unless shown otherwise, shall be of the bimetal helix or liquid -filled type. 3. All thermometers shall be round, stainless steel case construction with glass front. 4. Accuracy to be within plus or minus one of the smallest scale divisions throughout the entire range. 5. The thermometer scales shall have a minimum of 2 degrees between graduations and a maximum of 20 degrees between figures. 6. The thermometers shall be located so as to be easily read and shall be furnished with adjustable angle pattern so as to be rotated to any position. 7. Liquid thermometers for tanks and similar equipment shall have a minimum 5 -inch diameter face. 8. Thermometers for piping shall have a minimum face diameter of 3 inches. 9. Thermometers installed on insulated tanks or piping shall be provided with an extension neck well to compensate for the thickness of the insulation. 3