F. A manufacturer's valve tag shall be on all valves identifying the valve type and major component materials. G. Install valves after welding adjacent to valve is complete to protect seat and disk. H. Insulated valves shall have extended handle stems. All valves for all services shall be fully bi-directional and suitable for dead end service. On all valves the packing compression is to be independent of the stem, ball or handle systems.
All valve stems are to be blowout proof.
Packing shall be accessible without disturbing the insulation. K. Plug or gate valves shall not be used on any services without approval by the Department of Planning, Design and Construction . All valves used for vent or drain service on water systems shall have a brass hose connection with cap and chain. M. Non-electric radiator valves with valve mounted heads are not acceptable, except on cast iron radiators . See Section 15500 .