Emigrated to USA in 1903 and stayed with son, Luigi, living in California. Remained with Luigi from 1903-1906 and then returned to Italy to gather wife and remaining 3 sons. This information taken from ship's manifest of steerage passengers traveling on SS Cretic arriving from Naples to NY June 15, 1906. Luigi's address listed as: 1450 Porfio (?) St., Los Angeles, CA. Screenshot of manifest captured and included in Media for Nicola Pipolo.

from EllisIsland.org
Passenger: Nicola Pipolo
Age at arrival 43
Ship: Cretic
Departed Naples, Italy, 9 June 1906
Arrived New York 15 June 1906
Former Residence: Fogna, Italy

(Possible) Sailing information on a previous visit to his oldest son, Luigi, living in LA.

Passenger: Nicola Pipolo
Age at arrival: 38
Ship: Prinzess Irene (sic)
Departed Naples, Italy, 12 June 1903
Arrived New York 24 June 1903
Former Residence: Laurino, Italy
Interesting note (source?): This person stayed in NY from 1891-1902

This is unlikely because of reference to San Remo (Liguria)

from EllisIsland.org
Passenger: Nicola Pipolo
Age at arrival: 36 years
Ship: Massilia
Departed Naples: ?
Arrived New York 14 July 1900
Destination: visit "Relative" in Los Angeles (this would be his son, Luigi)
Former Residence: San Remo

1910 Los Angeles Directory:
Nick Pipolo
Boot Black
141 N. Main (r)
802 N. Broadway