ðɪs ɪz pɚtˈɪkjʊlɚli ɪmpˈoːɹtənt ɪf ðə pˈʌmpt flˈuːɪd ɔːɹ ɡˈæs ɪz kɚɹˈoʊsɪv, tˈɑːksɪk, flˈæməbəl, ɛksplˈoʊsɪv, ɐsˈɪdɪk, ˈælkəlˌaɪn, ɔːɹ ˈʌðɚwˌaɪz hˈɑːɹmfəl.
This is particularly important if the pumped fluid or gas is corrosive, toxic, flammable, explosive, acidic, alkaline, or otherwise harmful.