NST – Overview
Niles Steel Tank is an American tank manufacturer based in Niles, Michigan, with roots going back to 1898. Operating out of a campus that includes an 85,000 square foot Alloy Works facility, Niles designs and fabricates custom and stock tanks in carbon steel, stainless steel, and specialty alloys for commercial, industrial, and institutional applications across the country. Everything from engineering and design through fabrication, non-destructive testing, and final inspection happens on site, giving Niles complete control over quality and lead times from order to delivery.
Their product line covers a broad range of tank and water heating applications including domestic hot water storage tanks, hot water generators, large volume electric power water heaters, chilled water buffer tanks, hydraulic separators, expansion bladder tanks, indirect water heaters, boiler blowdown tanks, surge tanks, air receivers, and general process tanks. Most products are available in vertical and horizontal configurations with bare, jacketed, or insulated options, and Niles offers their proprietary Ultonium glass lining with Microban antimicrobial technology as a corrosion protection and hygiene upgrade on tanks where water quality and longevity are priorities.
Niles also carries ASME code certification across their product line and provides engineering support, a tank sizing tool, and written specifications to support the design and specification process. For engineers and contractors working on domestic hot water, hydronic, and building services applications, that combination of broad product coverage, code compliance, and in-house engineering capability makes Niles a manufacturer worth knowing.
| Company Name | Niles Steel Tank |
| Headquarters | 1701-A Terminal Road, Niles, MI 49120 |
| Website | nilesst.com |
| Type of Manufacturing | Carbon steel, stainless steel, and specialty alloy tanks |
| Certifications | ASME Code Certified |
| Markets Served | Commercial building services, institutional, hydronic heating and cooling, industrial, food and beverage, pharmaceutical, petro-chemical |
| Product Lines | Hot water generators, water storage tanks, chilled water buffer tanks, hydraulic separators, expansion bladder tanks, indirect water heaters, electric power water heaters, boiler blowdown tanks, surge tanks, air receivers, general process tanks |
| Made In | USA |
| Social Media |  |
WHY MERION PUMP AND NILES STEEL TANK
Tanks are part of almost every building services system Merion works on. A hot water generator paired with a boiler. A chilled water buffer tank smoothing out a cooling system. A hydraulic separator decoupling a primary loop from secondary distribution. A domestic hot water storage tank keeping supply available during peak demand. These are not glamorous specifications, but they are load-bearing ones, and getting the sizing, the construction, and the connections right from the start matters.
Merion carries Niles Steel Tank because their product line covers the full range of tank applications that come up in commercial and institutional building services without requiring us to go to multiple manufacturers. When a project needs a hot water storage tank alongside a pump and heat exchanger package, we can spec the tank from the same relationship we are already drawing on for the rest of the system. That simplicity benefits engineers, contractors, and building owners alike.
The Niles commitment to ASME code construction and their in-house engineering capability also gives us confidence when a project has non-standard requirements. Custom connection locations, unusual sizing, jacketed configurations for heat retention, or specialty alloy construction for demanding water chemistry conditions — Niles handles those requests through the same engineering team that builds their standard line, not through a separate custom fabrication process that adds time and uncertainty.
For Merion customers, a Niles tank specified through us comes backed by over a century of American tank manufacturing experience and a local team that understands the full system it is going into.
FEATURED PRODUCTS
Niles Steel Tank Hot Water Generator
For commercial and institutional buildings using a boiler to generate domestic hot water, the Niles hot water generator is the right tank for the job. Shell and tube or plate heat exchanger configurations transfer heat from the boiler loop to the domestic water supply efficiently and reliably, with sizing options to cover the full range of commercial demand profiles. Available with the Ultonium glass lining and Microban antimicrobial protection for applications where water quality and long service life are priorities.
Niles Steel Tank Chilled Water Buffer Tank
In chilled water systems where the chiller has a minimum run time requirement but building load varies significantly, a buffer tank prevents short cycling and protects the equipment. The Niles chilled water buffer tank provides the thermal mass to bridge the gap between chiller output and building demand, extending equipment life and improving system efficiency. Available in vertical and horizontal configurations with bare or insulated options.
Niles Steel Tank Hydraulic Separator
When a hydronic system runs primary and secondary loops at different flow rates, a hydraulic separator decouples those loops and prevents the flow imbalance from degrading system performance. The Niles hydraulic separator handles that function in a compact, well-engineered package that integrates cleanly into commercial mechanical room designs. A practical specification for any multi-zone hydronic system where primary and secondary circuit independence is part of the design intent.