Maxx Flex 2" x 50' HydroMaxx Black UL/US Non Kink Corrugated Flexible PVC Water Garden Pond Hose and Tubing This tubing works best with Alita, Atlantic Water Gardens, Aquascape, Little Giant, Oase, Pondmaster and Savio Products. Due to variations in fittings, some buildup may be required for secure fit. If you are using Tetra, Laguna, Little Giant, Cyprio, Savio, Alpine or Cal Pumps they require MM (Metric) tubing, which we also sell in our Amazon store This thick and durable hosing is reinforced with a rigid pvc ribbing that will not collapse due to back pressure or a reasonable amount of weight from gravel or covering material. Smooth inside - permits unrestricted flow, even with sharp turns, reducing operating costs. Made in the USA - Thick wall membrane yet very flexible - ideal for working in confined areas. Reduces the number of required fittings and permits the installer/user to make smooth, tight turns with ease. Mildew, sun, ozone (UV) and chemical resistant. The black hosing does not encourage the growth of algae and can easily be camouflaged. HydroMaxx tubing is non-toxic and will not harm fish or plants. Use with barbed or insert connectors. Secure with hose clamps. Temperature rating -5F to + 140F Very flexible - ideal for working in confined areas. Saves time, labor and cost. Reduces the number of required fittings and permits the installer/user to make smooth, tight turns. PVC tube with raised exterior PVC helix for strength and flexibility. Smooth inside - permits unrestricted flow, reducing operating costs. Designed for use with barbed or insert fittings and appropriate clamps. Mildew, sun, ozone (UV) and chemical resistant. The black hosing does not encourage the growth of algae and can easily be camouflaged. HydroMaxx tubing is non-toxic and will not harm fish or plants. This thick and durable hosing is reinforced with a rigid pvc ribbing that will not collapse due to back pressure or a reasonable amount of weight from gravel or covering material. Smooth inside - permits unrestricted flow, even with sharp turns, reducing operating costs Made from flexible and rigid PVC materials Strengthened with spiral helix Formulated with UV protectant Working temperature range 5 degrees F to 150 degrees F (service temperature range is application and conditions dependent) Replaces rigid pipe for plumbing in these and other applications:<ul class="a-unordered-list a-vertical"> Water gardens, Koi Ponds Waterfalls Sterilizers and filters Fountains Statuary Drains Aquariums and fish hatcheries Irrigation Gardening and light farming