About WSA

Established in 1952, Western Suppliers Association is a regional Association of Wholesale Distributors engaged in the business of wholesale distribution of plumbing, heating, cooling, and piping.

Associate Members, which include manufacturers and their representatives, are an integral part of Western Suppliers Association and fully participate in all our programs. The WSA region includes Northern CA & Northern NV, AK, HI, ID, MT, OR, WA, WY.

Western Suppliers Association Membership includes Quarterly Business Membership meetings with top-level informative programs in addition to an Annual Meeting held in September. WSA also administrates services for employer and employees, which includes medical, dental, vision and life, thru our sponsored partnership with Filice Insurance.

Membership in WSA automatically makes your firm a member of the American Supply Association, ASA, the national organization of wholesale distributors and their suppliers. ASA, headquartered in Chicago, is the recognized voice of our industry.


ASA and WSA work together for all our Members to create an Advocacy voice in Sacramento, California, and in Washington D.C.

Give us a call, 510.670.0962 or download and fill out a member application and Fax to: 510.670.9081.


Matt Laiolo – President
Rubenstein Supply
2800 San Pablo Avenue
Oakland, CA 94608

John Mills – Immediate Past President
WHCI Plumbing Supply
2900 Volpey Way
Union City, CA 94587
510.471.5757 | Email

Gina Sigillo – Vice President
Sigillo Supply
1623 Yosemite Avenue
San Francisco, CA 94124
415.822.1780 | Email

Rich Butler – Director
Cal Steam
1595 Crocker Avenue
Hayward, CA 94544
510.512.7700 | Email

Ryan Amaro – Treasurer
General Plumbing Supply
1530 San Luis Road
Walnut Creek, CA 94597-3114
925.939.4622 | Email

Jim Good – Advisory Director
2455 Mercantile Drive #100
Rancho Cordova, CA 95742
916.386.2233 | Email

Tim Kincaide – Advisory Director
R.D. Kincaide, Inc.
3070 Bay Vista Ct., Suite A,
Benicia, CA 94510
707.745.3655 | Email