Totally agree with what BBP said, + if the slab is 4" thick you can do 12 centers but 8" is more efficient. Any over pour (1.5" gypcrete, for example) should be MAX 9" spacing, 6" is better. AND.......250' max loop length. You are better off with 3 x 215 than 2 x 320. Pump must be either brass or SS, no iron body if you insist on using potable water in your loops.
The Marathon tank is an entirely plastic tank.
|