Williams Partners LP launched a public offering of senior notes to help repay its $1.4 billion of 4.875% senior notes due 2023 and other outstanding debt.

Terms such as aggregate principal amount, interest and maturity date have not yet been disclosed in the prospectus filed with the SEC. Net proceeds may also be used for general partnership purposes, according to a May 31 news release.

Bank of America, Merrill Lynch, Deutsche Bank Securities and RBC Capital Markets are acting as joint book-running managers.