It accepts 1-inch or 3/4-inch diameter aquarium heater; (Aquarium heater element is not included with module)
Overflow pipe automatically vents air from chamber for safe operation
Inlet Port 1 1/4-inch Slip/3/4-inch FPT; Outlet Port 1-inch Slip/3/4-inch FPT; Port size dimensions listed are pipe size; SLIP equal to PVC solvent socket type fittings
All Lifegard Mechanical, Chemical, Heater, and UV Sterilizers include 3/4-inch threaded reducing bushings if threaded installation is desired
The Lifegard Heater Module provides the most stable temperature possible by re-circulating aquarium water continuously around the heater element. The compression coupling allows easy installation and removal of the heater. The Heater Module also has a clear cap to view "On" light of the heater.