OSPHO 1 Gal. Rust Treatment Lamps & Fuses The BTU discharge capacity of

The BTU discharge capacity of the device shall be in excess of the BTU input rating of the heater

The temperature sensing element must be immersed in the water within the top 6"(152mm) of the tank

painted metal and properly prepared glossy surfaces

Removes soils from fins and coils

OSPHO 1 Gal. Rust Treatment Lamps & Fuses The BTU discharge capacity ofOSPHO is a rust inhibiting coating not a paint. OSPHO causes iron oxide (rust) to chemically change to iron phosphate an inert, hard substance that turns the metal black. Use on new metals, for new ferrous or aluminum metals. Is effective for exterior and interior work alike. Recommended for use under oil base primers and paints. Test a small area before using under epoxy or latex base paint. Covers approximately 600 Sq. Ft. per gallon. Normally