Recycle free heat from drainwater! GFX Heat Exchangers collect unused heat from greywater and recycle back to your hot water tank. Every time you take a shower, 100 degree water goes down the drain. GFX replaces your ordinary drainpipe with a highly efficient heat exchanger- waste heat goes back to your water heater! Recover as much as 60% of the heat and save up to 30% of your shower cost. Maintenance free, self cleaning, long-life all copper construction.
CONSTRUCTION 58" long, 3" diameter coper tubing wrapped with 100' of 1/2" tubing. GFX "Comfort Booster" G model is standard, 7 psi drop, single length 1/2" coil. S manifolded coils for pressure drop problem, 2 psi drop, manifolded 1/2" coils on single drain. P dual, parallel drain split for more, less than 2 psi with manifolded 1/2" coils. 60 - indicates length in inches (60 inches) 40 - (40 inches), 30- (30 inches) 4 inch drain avail.- call for price.A Lo-Copper GFX is a gravity film heat exchanger having a flattened coil with about 15 turns/ft.
MODEL DESIGN S = Double Coil; 3/4" cold in/out G = Single Coil; 1/2" cold in/out LC = Low Copper
GFX Double Coil Heat Exchangers 
Recycle free heat from drainwater! GFX Heat Exchangers collect unused heat from greywater and recycle back to your hot water tank. Every time you take a shower, 100 degree water goes down the drain. GFX replaces your ordinary drainpipe with a highly efficient heat exchanger- waste heat goes back to your water heater! Recover as much as 60% of the heat and save up to 30% of your shower cost. Maintenance free, self cleaning, long-life all copper construction.