Polypropylene Pipe Fittings

Polypropylene fittings are generally acceptable for working pressures up to 150 PSI at normal room temperatures.  At higher temperatures, the recommended working pressure decreases.  For example, at 140°F the maximum recommended working pressure is 90 PSI.
Polypropylene has good resistance to most agricultural chemicals, acid-based fertilizers, ammonium compounds, calcium carbonate, DDT, ethanol, hydrochloric acid, magnesium sulfate, oxalic acid, propionic acid, phosphoric acid, and sodium compounds.
Polypropylene should not be used with aromatic hydrocarbons, carbon tetrachloride, gasoline, hexane, kerosene, nitric acid, sodium hypochlorite, toluene, trichloroethylene, or xylene.
Not to be used with compressed gases.