PEX Tubing from Mr PEX and HousePEX - PEX Accessories for 5/8 Inch PEX Pipe
Addtional Information:
5/8 Inch PEX Tubing is a least common sizes of PEX Pipe for Residential Radiant Heat Systems. However, you can run longer loops than 1/2 inch PEX up to 400 feet or less. For this size PEX - it would be a good idea to use this for larger Cement Slab installs or for connecting separate systems. We would not recommend that you use this for under the floor as it has a much larger bend radius. We recommend PEX A as it is more flexible and can be un-kinked with a heater when kinked. Other PEX such as PEX B this is not possible. Thermal heat mass Creatherm works with 5/8 inch pex tubing and we also have PEX Radiant Manifolds are also available from 2 loops up to 13 loops.
We have a lot more information on Radiant PEX Heating Installs - Click here to see our Radiant Heating Learning Center