Mr. PEX Radiant Heat Manifold Packages include supply manifold with balancing valve and flow meter, return manifold with valves (ready for actuators), mounting brackets, end cap with drain, basic end cap, and adapters for 5/8" PEX-AL-PEX. These manifolds are ideal for radiant heat systems. They do not come assembled. **Please note these manifold packages require supply/return adapters which are sold separtely. These are part numbers 131, 132, 134, and 137 and offer different supply line connection options.