Section 355IAC3-7-4. Container valves and appurtenances

   (a) Each container shall have a fixed liquid level gauge.

  (b) The filling connection shall be fitted with an approved positive shutoff valve, in conjunction with either an internal back-pressure check valve or an internal excess flow valve.

  (c) An excess flow valve is not required in the vapor connection, provided the controlling orifice is not in excess of seven-sixteenths (⁷/₁₆) of an inch in diameter and the valve is a hand-operated (attached hand wheel or equivalent) shutoff valve. (To assist in filling applicator tanks, it is permissible to bleed vapors to the open air, providing the preceding requirements are met.)

  (d) Metering devices may be connected directly to the tank withdrawal valve. A union-type connection is permissible between the tank valve and the metering device. Remote mounting of metering devices is permissible using a hose that meets with the specifications of 355 IAC 3-2-7(b).

  (e) No excess flow valve is required in the liquid withdrawal service line provided the controlling orifice between the contents of the container and the outlet of the shutoff valve does not exceed seven-sixteenths (⁷/₁₆) of an inch in diameter. (State Chemist of the State of Indiana; Agricultural Ammonia PT A, Sec VII, Rule 7.3; filed Dec 30, 1965, 2:15 p.m.: Rules and Regs. 1966, p. 20; filed Jan 19, 2001, 2:04 p.m.: 24 IR 1644; readopted filed Jun 20, 2001, 3:22 p.m.: 24 IR 3822; readopted filed Apr 27, 2007, 2:03 p.m.: 20070509-IR-355070039RFA; readopted filed Nov 25, 2013, 3:27 p.m.: 20131225-IR-355130482RFA)