EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 33-37261, 33-69596, 33-69598, 33-61558, 333-79443, 333-08994, 333-42635, 333-89971, 333-36146, 333-36150 and 333-112527) and Form S-3 (File No. 333-113757 and 333-10585) of Southern Union Company of our report dated March 16, 2006, except with respect to our opinion on the consolidated financial statements insofar as it relates to the effects of the discontinued operations as discussed in the fifth paragraph of Note 3, as to which the date is July 17, 2006, relating to the consolidated financial statements, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting of Southern Union Company, which appears in the Current Report on Form 8-K of Southern Union Company dated July 17, 2006.

/s/ PricewaterhouseCoopers LLP

Houston, Texas

July 17, 2006