The HMUR-48 Water Caddy is specifically designed for hauling potable drinking water secured on top of a RV, trailer or hay rack. Tanks can also be used to store light chemicals, soaps and detergents.Tanks are manufactured from FDA approved medium-density Food Grade Polyethylene with U.V. inhibitors. The HR-35 Hay Rack Tank is also available and can be ordered and mounted in series with the HMUR-48 Hay Rack Tank which adds an additional 35 gallons of capacity or can be used as a separate liquid storage tank. Tank walls are translucent for level viewing. Hay Rack Water Caddy Tanks come with a standard fitting package complete with fill valve/cap and drain with single union ball valve. Tank also includes zip ties and a 10′ 3/4″ garden hose for easy drain-out from top of hay rack.