By order of the publisher, historical UL documents are not returnable for any reason. Once you place an order for an historical document, we cannot issue a refund, credit, or exchange of any kind.
These requirements cover the cons truction and performance of liquid-level indicating gauges for use on vented tanks used for the storage of oil burner fuel.

Liquid-level indicating gauges covered by these requirements include the following:

• Float-operated gauges for use with inside tanks for oil burner fuel.
• Float-operated permanent magnet-type gauges for use with inside tanks for oil burner fuel.
• Portable gauging devices for use primarily with inside tanks for oil burner fuel.