Apollo | sku: 310850440 Apollo 3/4 In. X 100 Ft. Blue Pex-A Pipe In Solid Apollo Expansion PEX is cross-linked polyethylene tubing designed for use within potable water piping systems. Produced using a Peroxide method, Apollo Expansion PEX is PEX-A pipe. Having been in use for over 50 years PEX-A pipe has the highest rate of... Log in for pricing