Form of Unit Certificate for 7.375% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units

Exhibit 4.1

Certificate Evidencing

7.375% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units

Representing Limited Partner Interests in

DCP Midstream, LP

In accordance with Section 4.1 of the Second Amended and Restated Agreement of Limited Partnership of DCP Midstream, LP, as amended, supplemented or restated from time to time (the “Partnership Agreement”), DCP Midstream, LP, a Delaware limited partnership (the “Partnership”), hereby certifies that                (the “Holder”) is the registered owner of 7.375% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units representing limited partner interests in the Partnership (the “Series A Preferred Units”), transferable on the books of the Partnership, in person or by duly authorized attorney, upon surrender of this Certificate properly endorsed. The rights, preferences and limitations of the Series A Preferred Units are set forth in, and this Certificate and the Series A Preferred Units represented hereby are issued and shall in all respects be subject to the terms and provisions of, the Partnership Agreement. Copies of the Partnership Agreement are on file at, and will be furnished without charge on delivery of written request to the Partnership at the principal office of the Partnership located at 370 17th Street, Suite 2500, Denver, Colorado 80202. Capitalized terms used herein but not defined shall have the meanings given them in the Partnership Agreement.

THE HOLDER OF THIS SECURITY ACKNOWLEDGES FOR THE BENEFIT OF DCP MIDSTREAM, LP THAT THIS SECURITY MAY NOT BE TRANSFERRED IF SUCH TRANSFER (AS DEFINED IN THE PARTNERSHIP AGREEMENT) WOULD (A) VIOLATE THE THEN APPLICABLE FEDERAL OR STATE SECURITIES LAWS OR RULES AND REGULATIONS OF THE SECURITIES AND EXCHANGE COMMISSION, ANY STATE SECURITIES COMMISSION OR ANY OTHER GOVERNMENTAL AUTHORITY WITH JURISDICTION OVER SUCH TRANSFER, (B) TERMINATE THE EXISTENCE OR QUALIFICATION OF DCP MIDSTREAM, LP UNDER THE LAWS OF THE STATE OF DELAWARE, OR (C) CAUSE DCP MIDSTREAM, LP TO BE TREATED AS AN ASSOCIATION TAXABLE AS A CORPORATION OR OTHERWISE TO BE TAXED AS AN ENTITY FOR FEDERAL INCOME TAX PURPOSES (TO THE EXTENT NOT ALREADY SO TREATED OR TAXED). DCP MIDSTREAM GP, LP, THE GENERAL PARTNER OF DCP MIDSTREAM, LP, MAY IMPOSE ADDITIONAL RESTRICTIONS ON THE TRANSFER OF THIS SECURITY IF IT RECEIVES AN OPINION OF COUNSEL THAT SUCH RESTRICTIONS ARE NECESSARY TO AVOID A SIGNIFICANT RISK OF DCP MIDSTREAM, LP BECOMING TAXABLE AS A CORPORATION OR OTHERWISE BECOMING TAXABLE AS AN ENTITY FOR FEDERAL INCOME TAX PURPOSES. THE RESTRICTIONS SET FORTH ABOVE SHALL NOT PRECLUDE THE SETTLEMENT OF ANY TRANSACTIONS INVOLVING THIS SECURITY ENTERED INTO THROUGH THE FACILITIES OF ANY NATIONAL SECURITIES EXCHANGE ON WHICH THIS SECURITY IS LISTED OR ADMITTED TO TRADING.

The Holder, by accepting this Certificate, is deemed to have (i) requested admission as, and agreed to become, a Limited Partner and to have agreed to comply with and be bound by and to have executed the Partnership Agreement, (ii) represented and warranted that the Holder has all right, power and authority and, if an individual, the capacity necessary to enter into the Partnership Agreement, (iii) granted the powers of attorney provided for in Section 2.6 of the Partnership Agreement and (iv) made the waivers and given the consents and approvals contained in the Partnership Agreement.

This Certificate shall not be valid for any purpose unless it has been countersigned and registered by the Transfer Agent and Registrar.

ABBREVIATIONS

The following abbreviations, when used in the inscription on the face of this Certificate, shall be construed as follows according to applicable laws or regulations:

Additional abbreviations, though not in the above list, may also be used.

ASSIGNMENT OF SERIES A PREFERRED UNITS OF

DCP MIDSTREAM, LP

FOR VALUE RECEIVED, __________ hereby assigns, conveys, sells and transfers unto:

__________ Series A Preferred Units representing limited partnership interests evidenced by this Certificate, subject to the Partnership Agreement, and does hereby irrevocably constitute and appoint __________ as its attorney-in-fact with full power of substitution to transfer the same on the books of DCP Midstream, LP.

No transfer of the Series A Preferred Units evidenced hereby will be registered on the books of the Partnership, unless the Certificate evidencing the Series A Preferred Units to be transferred is surrendered for registration or transfer.

ASSIGNEE CERTIFICATION

Type of Entity (check one):

Nationality (check one):

If the U.S. Citizen, Resident or Domestic Entity box is checked, the following certification must be completed.

Under Section 1445(e) of the Internal Revenue Code of 1986, as amended (the “Code”), the Partnership must withhold tax with respect to certain transfers of property if a holder of an interest in the Partnership is a foreign person. To inform the Partnership that no withholding is required with respect to the undersigned interestholder’s Interest in it, the undersigned hereby certifies the following (or, if applicable, certifies the following on behalf of the interestholder).

Complete Either A or B:

A. Individual Interestholder

1. I am not a non-resident alien for purposes of U.S. income taxation;

2. My U.S. taxpayer identification number (social security number) is ________________________.

3. My home address is: ___________________________________.

B. Partnership, Corporation or Other Interestholder

1. __________________ is not a foreign corporation, foreign partnership, foreign trust or foreign estate (as those terms are defined in the Code and Treasury Regulations).

2. The interestholder is not a disregarded entity as defined in Section 1.1445-2(b)(2)(iii) of the Income Tax Regulations promulgated under the Code.

3. The interestholder’s U.S. employer identification number is ______________________________.

4. The interestholder’s office address and place of incorporation (if applicable) is _______________.

The interestholder agrees to notify the Partnership within sixty (60) days of the date the interestholder becomes a foreign person.

The interestholder understands that this Certificate may be disclosed to the Internal Revenue Service by the Partnership and that any false statement contained herein could be punishable by fine, imprisonment or both.

Under penalties of perjury, I declare that I have examined this certification and to the best of my knowledge and belief it is true, correct and complete and, if applicable, I further declare that I have authority to sign this document on behalf of:

Name of Interestholder

Signature and Date

Title (if applicable)

Note: If the assignee is a broker, dealer, bank, trust company, clearing corporation, other nominee holder or an agent of any of the foregoing, and is holding for the account of any other person, this certification should be completed by an officer thereof or, in the case of a broker or dealer, by a registered representative who is a member of a registered national securities exchange or a member of the National Association of Securities Dealers, Inc. or, in the case of any other nominee holder, a person performing a similar function. If the Assignee is a broker, dealer, bank, trust company, clearing corporation, other nominee owner or an agent of any of the foregoing, the above certification as to any person for whom the assignee will hold the Series A Preferred Units shall be made to the best of Assignee’s knowledge.