Wholer is an online marketplace focused on water purification, water treatment, and related appliances. Its catalogue serves households, businesses, and industrial users, with domestic RO purifiers in several capacities and technologies, including RO, UV, UF, alkaline, and under-sink systems. Shoppers can also find filter cartridges, membranes, pumps, faucets, tanks, and other purifier accessories and spare parts.

For commercial and institutional needs, Wholer offers RO plants across a range of capacities, along with industrial components such as FRP vessels, dosing pumps, flow meters, and control panels. The selection also includes whole-house and industrial water softeners, softener resin, brine tanks, valves, and salt. Water coolers are available in storage and instant formats, including models with built-in RO, as well as replacement parts.

The site lists services including purifier and plant installation, pipeline work, commissioning, water testing, media replacement, membrane cleaning, and maintenance booking. Customers can browse products online, track orders, compare items, and request bulk-order information.