HOT WATER DIVERTER TEE

PORKCHOP

WE ARE REPLACING A BOILER THAT WAS INSTALLED IN THE 50'S,  THIS SYSTEM HAS ORIGINAL CIRCULATORS QTY. TWO INSTALLED ON THE RETURN SIDE OF THE SYSTEM.  WE JUST ACQUIRED THIS CUSTOMER THROUGH A CONTRACTOR THAT IS DOING A RENOVATION PROJECT.  WE DON'T KNOW THE HISTORY OF THE SYSTEM OTHER THAN THEY HAVE HAD PROBLEMS HEATING IN SOME AREAS MOSTLY THE SECOND FLOOR.  THE PIPING IS SPLIT SO THAT FRONT SECTION OF HOUSE IS ON 1 PIPE AND BACK SECTION ON ANOTHER PIPE.  I AM THINKING OF INSTALLING ONE CIRCULATOR ON THE SUPPLY AND PIPING AS RECOMMENDED FROM DAN'S BOOK PUMPING AWAY.  TO DETERMINE THE PROPER FT. OF HEAD I AM TRYING TO DETERMINE THE PRESS. DROP ACROSS THE OLD CAST IRON MONO FLO FITTINGS AND THE PRESS. DROP ACROSS THE CONVECTION STYLE RADIATORS. 

IS THERE ANYONE THAT CAN HELP ON THE PRESSURE DROP OF THESE ITEMS OR WHERE TO LOOK FOR THIS INFO?

ARE WE DOING THE RIGHT THING BY GOING FROM TWO TO ONE CIRCULATORS AND MOVING CIRCULATOR TO THE SUPPLY SIDE

THANKS

PORK CHOP

Brad White

Probably more than you bargained for,

but the attached are things I have collected over the years from this site and others, specific to MonoFlo tees. 

PORKCHOP

monoflo hot water system

BRAD

THANKS FOR THE INFORMATION.  I HAVE SAVED ALL OF THE ATTACHMENTS.  THIS INFO LOOKS LIKE SOMETHING THAT WILL BE USEFUL FOR THIS PROJECT AS WELL AS FURTURE PROJECTS.

RONNIE

JStar

I may be wrong.

But I always figured that a diverter tee pressure drop was only a critical measurement when you need to remove radiators and cap lines. The pressure you lose at the tee is gained back after the tee. You can see on that one B+G chart, the footnote mentions that the CV ratings are for plugged bull tees. 

Mike Kusiak_2

One or two circulators?

Why would you want to use a single circulator instead of separate ones on each circuit? I would think it would be much easier to balance the system with two circulators. In addition, you have the ability to separate the system into two zones using separate thermostats.