Flow rates

Josh_10

Well your velocity at 11 GPM through 1 1/4" pipe is about 3.9 feet per second with PEX, and copper is about 3.9 feet per second at 16 GPM with 100% water. With 1 1/2" you max out at 15 GPM with PEX at 3.8 feet per second, and 22 GPM with copper at 3.9 feet per second.

The basic rule of thumb is to keep your velocity between 2 and 4 feet per second to eliminate noise on the upper end and push air through on the lower end. I like to keep my near boiler piping as close to 2 feet per second as possible for air elimination.

Glen

Heat seal flow rates

Re the Heatlink Heatseal tubing flow rates; what are the practical max gpm's I can expect to move with either the 1.25 or the 1.5 inch tubing?

Glen

thanks

info much appreciated.