Exhibit 23.3
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Post-Effective Amendment No. 1 on Form S-3 to the Registration Statement on Form S-1 of MarkWest Energy Partners, L.P. of (i) our report dated April 15, 2005 relating to the financial statements of Javelina Company, which appears in the Current Report on Form 8-K/A (Amendment No. 1) of MarkWest Energy Partners, L.P. dated November 1, 2005 and (ii) our report dated March 27, 2006 relating to the financial statements of Starfish Pipeline Company, LLC, which appears in MarkWest Energy Partners, L.P.'s Annual Report on Form 10-K/A (Amendment No. 2) for the year ended December 31, 2005. We also consent to the reference to us under the heading "Experts" in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
Houston, Texas
December 6, 2006
