Simple 2 Pipe Vacuum Setup

Fizz

Vacuum vents are on air/condesate returns, none on supply mains.

PMJ

> @Fizz said:
> Have been using vacuum in my system for one year since last March just using 2 Mepco quick vents(vacuum) one on each dry return(Richardson System) no other stuff. My system is set for 3cpm on hot water setting of t-stat. Vacuum is between 2-4, except on extremely cold days-single digits and below, where a run of about 13-14" will lower vacuum to 9-10. My usual run time has been6-7" per fire. Heat has been steady and comfortable. No vapor lock.. Pressure never gets above 0 on run.

Great @Fizz . You've got it. Thanks for sharing that.

Fizz

Got it from you PMJ, thanks!

Koan

@Fizz - do you know the vent flow of the Mepco? is it zero cracking pressure?