Air Block in Pex Tubing

[BulldogAcres]

My Pex Tubing is higher than my heat source. Will the circulation pump force out all the air in the Pex Tubing, or should I put some air bleeders on the high point of the return and supply Pex Tubing lines. The heat source has an air bleeder on it. Just to make things more clear, the heat source and pump are 3 feet lower than the radiant flooring.

 

[Frozen Canuck]

No down side to installing bleeders at high points

When the system air, vapor locks it is real hard on components, pumps

Auto bleeders are cheap compared to pumps etc

 

[Clarkbug]

I agree with Frozen Canuck.

Definitely put in some air bleeders. You may be able to purge the system with circs, but if you cant, then you need to go and put them in anyway. Might as well add them now and then use those instead of risking your pumps.