The House Supplier is an online retailer of plumbing, heating, ventilation, air conditioning, water-heating, and smart-home supplies for professionals, homeowners, and building projects. Its catalog spans pipe and fittings, valves, PEX systems, drains, bathroom and kitchen fixtures, water heaters, boilers, furnaces, heat pumps, pumps, controls, ventilation equipment, and cooling and mini-split products. Shoppers can also find tools and accessories, indoor air-quality products, water-treatment equipment, smart thermostats, leak detection and shut-off devices, and home security products.

The store carries products from more than 180 brands, including Honeywell Home, Resideo, Viega, Mueller, Rheem, Navien, and Milwaukee. Its website features popular categories, featured products, clearance deals, and supplies for spaces throughout the home, from kitchens and bathrooms to garages and laundry rooms. The House Supplier offers fast shipping across the United States and free shipping on qualifying orders. Customers with large orders or job-site projects can call the company to request a quote.