Amazon Supply still is not selling china or fiberglass, but it does offer more than 54,000 fittings, valves, tubing, pumps and meters. It also offers 5,300 HVAC supplies, tools and meters, but no equipment.
Grainger sells only a few commercial bathroom fixtures, but claims more than 31,000 pipe, valves, fittings, water heaters, toilets, replacement parts and faucets and repair kits. And it claims an additional 30,000 HVAC SKUs including equipment, parts and supplies.