Kuriyama's Tigerflex® FMCR™ Series Suction Spa Hose is constructed of a PVC tube with a rigid PVC helix and is commonly referred to as flex pipe. This precision controlled hose is designed to be glued into schedule 40 PVC fittings and is easy to install. Series FMCR™ hose is ideal for working in confined areas and permits the installers to make smooth tight turns. Series FMCR™ is IAPMO approved for piping spas, hot tubs, and swimming pools. General applications include drain lines, spa, pool, and hot tub plumbing.