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Westlake Pipe & Fittings
Customer Information

NAPCO is now Westlake Pipe & Fittings

As a reminder, NAPCO Pipe & Fittings is now Westlake Pipe & Fittings effective April 30, 2022. You have known us in the past as NAPCO Pipe & Fittings along with a number of other legacy brands and now we are redefining our business to directly reflect the true value you receive as a vendor backed by the brand equity of Westlake Corporation, a Fortune 500 company. With the change, please see the following frequently asked questions. For additional questions, please email


  • I am in the United States and my company cannot change the vendor name without a W-9.

    • The W9 for Westlake Pipe & Fittings is here

  • I am in Canada and my company cannot change the vendor name without a W-8.

    • The W8 for Westlake Pipe & Fittings is here

  • I received the letter for the name change, please provide an updated tax exemption form.

    • We have applied to the states for tax exemption certificates and direct pay permits to reflect the name change.  A tax exempt certificate or direct pay permit will be provided once available.

  • Are you related to Royal Group Inc.?

    • Royal Group Inc. is also a Westlake owned company and is a Canadian trade name used by another business within Westlake Corporation. 

  • Will the NAPCO Royal Pipe & Fittings operating in Canada change names?

    • The name of our Canadian entity will change from Royal Building Products – dba NAPCO Royal Pipe & Fittings, to Westlake Canada Inc. – dba Westlake Pipe & Fittings.

    • Old Name

      New Name

      Royal Building Products – dba NAPCO Royal Pipe & Fittings

      Westlake Canada Inc. – dba Westlake Pipe & Fittings

  • Will we be getting a new credit application form?

    • A new form is not required unless a new credit review is required.

  • Will the remit address / VENDOR INFORMATION change?

    • Please note the remit changes for former Plastic Trends and LASCO only.

    • Company

      Old Remit

      New Remit


      16678 Collections Ctr Dr. Chicago, IL  60693

      P.O. Box 198258

      Atlanta, GA  30384


      Plastic Trends

      21319 Network Place

      Chicago, IL  60673


      P.O. Box 198258

      Atlanta, GA  30384


  • When should the customer address a Purchase Order (PO) as the new vendor?

    • If a W-8/W-9 is required to make the name change, the name can remain as-is until the new W-8/W-9 is available.  If the form is not required, plan to make the name change when the W-8/W-9 are available.

  • What is the address for the vendor?

    • Corporate address for US and Canada is:

      2801 Post Oak Blvd., Suite #600, Houston, Texas 77056

  • Will FEIN or EIN change with the name change?

    • Westlake Pipe & Fittings will hold one W9. Please note EIN, the change for former Plastic Trends and LASCO only.

    • Company

      Old FEIN

      NEW FEIN




      Plastic Trends



  • Will there be only one 'Pay to" vendor for Westlake Pipe & Fittings in place of all these vendors?

    • We are moving to one vendor set-up for customers.  North American Pipe is the first entity to move to Westlake Pipe & Fittings.  Mid-summer, North American Specialty Products, Plastic Trends, and Lasco will move under the same name, Westlake Pipe & Fittings.  Until a notice is sent, only North American Pipe has changed their name, others will remain as-is for now.  Separate vendors are required at this time.

  • My company does business with North American Pipe and North American Specialty, do either of these names change - or are both changing?

    • The name change is only for North American Pipe at this time. 

  • With the name change, who do I send our purchase orders to now? 

    • There is no change to who you send purchase orders to for processing, it remains the same as before the name change.

Further questions? Email

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