How do you fill a radiant system with the least amount of headache, in order to get the air out?  Should you flush through the boiler side?  What takes the least amount of time? When is a fill cart helpful?  Is street pressure water enough to properly purge? In this episode, the guys share their field experience filling manifolds.  Just like toppings on a hot dog, there is no one specific way to do it that everyone will agree on.  Dan and Greg go over the hows and whys for the different approaches.  They mention the specifics for the various styles of Caleffi manifolds, including when to use the H-fitting on the 172 series products.  Want to hear YOUR QUESTION on Ask Caleffi, take this quick 4 question survey for your chance to hear your question in a future episode. Survey: https://forms.gle/fRfnU8Px3B1Lq7K69