Exhibit 25.1

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM T-1

STATEMENT OF ELIGIBILITY

UNDER THE TRUST INDENTURE ACT OF 1939 OF A

CORPORATION DESIGNATED TO ACT AS TRUSTEE

¨ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2)

THE BANK OF NEW YORK MELLON

TRUST COMPANY, N.A.

(Exact name of trustee as specified in its charter)

	95-3571558
(Jurisdiction of incorporation if not a U.S. national bank)	(I.R.S. employer identification no.)
700 South Flower Street Suite 500 Los Angeles, California	90017
(Address of principal executive offices)	(Zip code)

WESTLAKE CHEMICAL CORPORATION

(Exact name of obligor as specified in its charter)

Delaware	76-0346924
(State or other jurisdiction of incorporation or organization)	(I.R.S. employer identification no.)

TABLE OF ADDITIONAL REGISTRANTS

Exact Name of Additional Registrants	Jurisdiction of Incorporation/ Organization	I.R.S. Employer Identification Number
Geismar Holdings, Inc.	Delaware	33-1036002
GVGP, Inc.	Delaware	71-0921650
North American Pipe Corporation	Delaware	76-0370735
Westech Building Products, Inc.	Delaware	76-0498816
Westlake Chemical Investments, Inc.	Delaware	76-0664309
Westlake Development Corporation	Delaware	76-0666307
Westlake Ethylene Pipeline Corporation	Delaware	61-1513966
Westlake Geismar Power Company LLC	Delaware	35-2330798
Westlake Longview Corporation	Delaware	61-1496835
Westlake Management Services, Inc.	Delaware	76-0321065
Westlake NG I Corporation	Delaware	30-0343980
Westlake NG IV Corporation	Delaware	35-2330799
Westlake NG V Corporation	Delaware	35-2330801
Westlake Olefins Corporation	Delaware	52-1629821
Westlake Petrochemicals LLC	Delaware	76-0553330
Westlake Pipeline Investments LLC	Delaware	27-3400646
Westlake Polymers LLC	Delaware	76-0144230
Westlake PVC Corporation	Delaware	76-0346192
Westlake Resources Corporation	Delaware	76-0321064
Westlake Styrene LLC	Delaware	76-0294926

2

Westlake Supply and Trading Company	Delaware	76-0377613
Westlake Vinyl Corporation	Delaware	76-0414632
Westlake Vinyls Company LP	Delaware	06-1641487
Westlake Vinyls, Inc.	Delaware	76-0542667
WPT LLC	Delaware	76-0469048

2801 Post Oak Boulevard, Suite 600 Houston, Texas	77056
(Address of principal executive offices)	(Zip code)

Senior Debt Securities

and Guarantees of Senior Debt Securities

(Title of the indenture securities)

3

1. General information. Furnish the following information as to the trustee:

(a) Name and address of each examining or supervising authority to which it is subject.

Name	Address
Comptroller of the Currency United States Department of the Treasury	Washington, DC 20219
Federal Reserve Bank	San Francisco, CA 94105
Federal Deposit Insurance Corporation	Washington, DC 20429

(b) Whether it is authorized to exercise corporate trust powers.

Yes.

2. Affiliations with Obligor.

If the obligor is an affiliate of the trustee, describe each such affiliation.

None.

16. List of Exhibits.

Exhibits identified in parentheses below, on file with the Commission, are incorporated herein by reference as an exhibit hereto, pursuant to Rule 7a-29 under the Trust Indenture Act of 1939 (the “Act”) and 17 C.F.R. 229.10(d).

1. A copy of the articles of association of The Bank of New York Mellon Trust Company, N.A., formerly known as The Bank of New York Trust Company, N.A. (Exhibit 1 to Form T-1 filed with Registration Statement No. 333-121948 and Exhibit 1 to Form T-1 filed with Registration Statement No. 333-152875).

2. A copy of certificate of authority of the trustee to commence business. (Exhibit 2 to Form T-1 filed with Registration Statement No. 333-121948).

3. A copy of the authorization of the trustee to exercise corporate trust powers (Exhibit 3 to Form T-1 filed with Registration Statement No. 333-152875).

4

4. A copy of the existing by-laws of the trustee (Exhibit 4 to Form T-1 filed with Registration Statement No. 333-162713).

6. The consent of the trustee required by Section 321(b) of the Act (Exhibit 6 to Form T-1 filed with Registration Statement No. 333-152875).

7. A copy of the latest report of condition of the Trustee published pursuant to law or to the requirements of its supervising or examining authority.

5

SIGNATURE

Pursuant to the requirements of the Act, the trustee, The Bank of New York Mellon Trust Company, N.A., a banking association organized and existing under the laws of the United States of America, has duly caused this statement of eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of Houston, and State of Texas, on the 30th day of September, 2011.

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
By:	/s/ Rafael Martinez
Name:	Rafael Martinez
Title:	Senior Associate

6

EXHIBIT 7

Consolidated Report of Condition of

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.

of 700 South Flower Street, Suite 200, Los Angeles, CA 90017

At the close of business June 30, 2011, published in accordance with Federal regulatory authority instructions.

		Dollar Amounts in Thousands
ASSETS
Cash and balances due from depository institutions:
Noninterest-bearing balances and currency and coin			1,624
Interest-bearing balances			186
Securities:
Held-to-maturity securities			0
Available-for-sale securities			828,663
Federal funds sold and securities purchased under agreements to resell:
Federal funds sold			60,500
Securities purchased under agreements to resell			0
Loans and lease financing receivables:
Loans and leases held for sale			0
Loans and leases, net of unearned income	0
LESS: Allowance for loan and lease losses	0
Loans and leases, net of unearned income and allowance			0
Trading assets			0
Premises and fixed assets (including capitalized leases)			8,561
Other real estate owned			0
Investments in unconsolidated subsidiaries and associated companies			0
Direct and indirect investments in real estate ventures 0
Intangible assets:
Goodwill			856,313
Other intangible assets			201,961
Other assets			146,990
Total assets		$	2,104,798

1

LIABILITIES
Deposits:
In domestic offices		506
Noninterest-bearing	506
Interest-bearing	0
Not applicable
Federal funds purchased and securities sold under agreements to repurchase:
Federal funds purchased		0
Securities sold under agreements to repurchase		0
Trading liabilities		0
Other borrowed money:
(includes mortgage indebtedness and obligations under capitalized leases)		268,691
Not applicable
Not applicable
Subordinated notes and debentures		0
Other liabilities		227,247
Total liabilities		496,444
Not applicable
EQUITY CAPITAL
Perpetual preferred stock and related surplus		0
Common stock		1,000
Surplus (exclude all surplus related to preferred stock)		1,121,520
Not available
Retained earnings		482,674
Accumulated other comprehensive income		3,160
Other equity capital components		0
Not available
Total bank equity capital 1,608,354
Noncontrolling (minority) interests in consolidated subsidiaries		0
Total equity capital		1,608,354
Total liabilities and equity capital		2,104,798

I, Karen Bayz, CFO and Managing Director of the above-named bank do hereby declare that the Reports of Condition and Income (including the supporting schedules) for this report date have been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and are true to the best of my knowledge and belief.

Karen Bayz ) CFO and Managing Director

We, the undersigned directors (trustees), attest to the correctness of the Report of Condition (including the supporting schedules) for this report date and declare that it has been examined by us and to the best of our knowledge and belief has been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and is true and correct.

Timothy Vara, President	)
Frank P. Sulzberger, MD	)	Directors (Trustees)
William D. Lindelof, MD	)

2