what's the best way to bleed a radiant multizone manifold.

markhenry

do i close all the returns and feeds on the manifold execpt the zone im bleeding

Unknown

Purging,,,

In a "nutshell"----- YES. ;-)

Paul Pollets

Manifold loop purging

Close the return valve on the manifold, close all loop ports on supply or return (depends on Manufacturer) open  one loop at a time with a short hose attached to the boiler drain on the manifold return. When the stream is bubble free, close the port and do the next. When all are purged open up the ports and return valve.  I like to purge into a 5g bucket so I can observe the purging.