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Published on Apr 26, 2012
Rifeng stainless steel Manifolds are used for radiant heat, baseboards and other hydronic heating systems. PexSupply.com offers the manifolds in different sizes ranging from 2 to 12 loops. They provide a central place to connect both your supply and return lines.
Shut off valves, temperature gauges, bleeders and drain valves are included for both the supply and return. Bleeders are used to release any air from the system when it is first filled with water and drain valves allow you to drain the system if needed. Temperature gauges make it easy to monitor the water temperature in your system. Shut off valves are used to close off either the supply or return ports if a repair is needed.
It is best to set up your system with loops of approximately the same length. However, because they will never be exact and water follows the path of least resistance, flow valves are needed to ensure the heat is evenly distributed throughout a system. The flow valves are included with Rifeng stainless steel manifolds, along with flow meters that give a visual indication of the water flow in each loop.
Many people ask if they can turn the manifold upside down to better fit their existing system. You can do this, but we don't recommend it because your flow valves should always be pointing up as they use gravity to work properly.
If you want to use your manifold to heat multiple zones, you can purchase return side actuators. The actuators act as zone valves to allow you to use one manifold to control the temperature in different rooms independently.
The shut off valve needed to connect your supply line to the manifold has a standard, one-inch female pipe thread. The compression fittings for the loops use EK20 pipe thread from 3/8ths up to 5/8ths of an inch. PexSupply.com offers the individual manifolds as well as manifold kits that include the required fittings.
For more information on radiant heat manifolds or other Rifeng products, please visit our Resource Center at www.pexsupply.com.