Resources & Experience Stanco Plumbing Specialties, a family-owned plumbing specialties supplier, opened in 1974 to service serviced parts of North and all of South Texas, Louisiana... - People Knowledge Service The transition from Stanco to TMS South means more resources, more locations and an even broader base of experience in plumbing, parts, building codes... to 33 employees. Since that time, Stanco (now TMS South) has served the plumbing supply needs of plumbing contractor, schools, health care, property management, apartment...