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[johnybcold]

I am going to heat my garage and I was thinking of lopping from the boiler to the garage before my boiler so my garage would be heated with no extra elec use ( just a radiator ) my boiler is about 135' from the boiler is the taco pump in the furnace enough how far can that pump before  I have to add a pump?

[HandyMark]

I am going to heat my garage and I was thinking of lopping from the boiler to the garage before my boiler so my garage would be heated with no extra elec use ( just a radiator ) my boiler is about 135' from the boiler is the taco pump in the furnace enough how far can that pump before  I have to add a pump?

I am confused. " from the boiler to the garage before my boiler" " my boiler is about 135' from the boiler"
I assume you want to run to the house, then the garage, and back to the boiler. What is the distance from the boiler to the house? House to garage? Garage to boiler?

[ThatGUY]

Also, what size pipe/tubing are you running? 

[Scott7m]

What your trying to do isn't easy, does your cb have a primary and secondary loop or thermo valve?

Your return water back to the stove would be to cold at times and would cause tremendous condensation on the fire box walls. 

If your boilers protected, you could possibly still do this.  You could use "close t's". 2 t's back to back near your coils, one the supply side of one t you'd have a pump that only kicked on when heat was being called for....  But your main pump would run all the time