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  • (281) 448-1782
15730 Sellers, Houston, TX 77060
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  • (281) 448-1782
  • (281) 999-3297

The MRK Promise:

We will grow your business by building on established customer relations, providing outstanding service, and fielding the very best sales team in Texas.



The Company

MRK Manufacturer's Sales, Inc., established in December 2000, is a marketing and sales agency targeting builders, architects/engineers, plumbing contractors and wholesalers. The company’s co-founders, Doug Rihn and Shawn McCall, are both seasoned professionals with a combined 43 years of experience. That experience, coupled with decades of familiarity with the regional market, positions the company for success.  MRK Manufacturer's Sales, Inc's territory is South Central Texas, including the Houston, Austin, San Antonio, Corpus Christi and Rio Grande Valley markets. To ensure comprehensive regional representation of our wholesalers’ lines, MRK has assembled an energetic, highly talented and connected team of innovative sales professionals. In the Houston market, McCall is joined by Mike Godwin, Outside Sales Representative; Rihn handles San Antonio and the Rio Grande Valley while Cole McCall covers the Austin and Marble Falls markets respectively.


** MRK represents only non-competing lines. **

The Principals

McCall and Rihn are established, expert salesmen with unmatched familiarity and knowledge of the South Texas plumbing wholesale market. Their names are well known and respected among their peers; their networks are extensive.  McCall and Rihn are multi-year WDA Representative of the Year nominees; McCall captured the award in 1999 and 2001.

Meet Our Staff

Shawn McCall

Shawn McCall Outside Sales

Contact us

  • (281) 448-1782
  • (281) 999-3297
Houston | East Texas | Victoria
Doug Rihn

Doug Rihn Outside Sales

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  • (281) 448-1782
  • (281) 999-3297
San Antonio | Kerrville | Rio Grande Valley
Jack Doran

Jack Doran Inside - Outside Sales

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  • (281) 448-1782
  • (281) 999-3297
Houston | East Texas
Mike Godwin

Mike Godwin Outside Sales

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  • (281) 448-1782
  • (281) 999-3297
Houston | Bryan - College Station
Lindsay Mathis

Lindsay Mathis Inside Sales

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  • (281) 448-1782
  • (281) 999-3297
Cole McCall

Cole McCall

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  • (281) 448-1782
  • (281) 999-3297
Austin | San Marcos | Marble Falls

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