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Business Details
50+ Years
experience
Your Trusted Source for Building Supplies in Hilmar, CA
Founded in 1951 by Lyman and Lon Waterston, Hilmar Lumber began as a modest lumber yard on Lander Avenue, evolving into a comprehensive supplier of building materials and agricultural solutions. Our legacy of quality and customer-centric service spans over seven decades, driven by a commitment to innovation and reliability. We specialize in hardware, plumbing, irrigation, and steel products, alongside pioneering dairy flush systems like the GRATEVALVE. Our team combines generational expertise with hands-on industry knowledge to deliver tailored solutions for residential and agricultural projects.

As a trusted local business, we adhere to rigorous standards, ensuring every product and service meets the demands of hostile environments while maintaining cost-effectiveness. Our dedication to transparency, ethical practices, and community needs has solidified our reputation as a leader in California's building supply sector.
Services
GRATEVALVE Flush System Cable Fencing Supplies Irrigation Products Septic Systems SmartVent Flood Protection Plumbing Materials Hardware Sales Garden Center Paint and Coatings Steel and Pipe Supplies
Details
  • Year established: 1951
Highlights and features
  • We offer over 70 years of experience in building supplies and agricultural solutions.
  • Home of the patented GRATEVALVE dairy flush system for durable, efficient operations.
  • We ship products nationwide, ensuring accessibility beyond California.
  • Unbeatable pricing on cable fencing and custom solutions for agricultural needs.
  • Comprehensive inventory spanning construction, septic systems, and SmartVent flood protection.
Services
GRATEVALVE Flush System
The GRATEVALVE is a durable, stainless steel and PVC dairy flush valve designed for hostile environments. Its swiveling grate directs water flow efficiently, gluing directly to PVC pipes. Ideal for agricultural use, it ensures long-term reliability in waste management systems.
Cable Fencing Supplies
We supply galvanized cable, tension springs, and hardware for sturdy cable corral fences. Our products include pre-cut posts, OSPHO rust reformer, and Klein Tools cable pullers, supporting both DIY and professional agricultural fencing projects.
SmartVent Flood Protection
SmartVent systems mitigate flood damage with automatic float mechanisms, reducing hydrostatic pressure on foundations. ICC-certified and FEMA-approved, these vents lower insurance premiums while maintaining aesthetic home designs.
Septic Systems
We offer Infiltrator septic tanks in 5001500-gallon capacities, approved for all California counties. Paired with leach chambers, they provide efficient wastewater management solutions for residential and agricultural properties.
Irrigation Supplies
Our irrigation inventory includes PVC and steel pipes, line-gates, slide gates, and repair fittings. These products support efficient water management for agricultural fields, ensuring durability and adaptability to various farm needs.
Questions
What products does Hilmar Lumber offer?
We provide building materials, plumbing, irrigation, dairy flush systems, cable fencing, septic tanks, SmartVent flood protection, paint, and hardware.
Do you ship outside California?
Yes, we ship products nationwide, including cable fencing supplies and agricultural equipment.
What is the GRATEVALVE system?
The GRATEVALVE is a patented dairy flush valve made of stainless steel and PVC, designed for efficient waste removal in agricultural settings.
Are SmartVent products code-compliant?
Yes, SmartVent is ICC-certified, FEMA-approved, and meets flood resistance code requirements for residential and commercial buildings.
How long has Hilmar Lumber been in business?
We were founded on January 1, 1951, and have served customers for over 70 years.