ELECTRIC WATER HEATERS WILL SELDOM WORK FOR RADIANT HEAT
Electric water heaters simply do not have enough Btu output for space heating. Remember when you take a shower you are using the stored hot water not the water that it is being heated.
FOUR 3/4" X 3" BRASS NIPPLES TWO 3/4" BRASS TEES ONE 3/4" BRASS BOILER DRAIN ONE BRASS CIRCULATION PUMP, MEDIUM HEAD WITH 3/4" BRASS FLANGES TWO 3/4" FULL FLOW BALL VALVES TWO 3/4" X 1/2" REDUCING BUSHINGS TWO 1/2" MIP. BY 1/2" PEX ADAPTERS 1/2" ID PEX TUBING 300 FEET OR LESS