The tankless drain pan is designed to fit underneath most whole house tankless water heaters providing both water damage protection and flushing maintenance convenience.. Includes CPVC drain fitting. Protect finished areas from water damage. Non-toxic. Injection molded for superior strength. For use with gas or electric tankless water heaters. Fits most tankless water heaters with a maximum depth of 13 in. and width of 20-1/2 in.. Will not rust or corrode. Recyclable. 1-year limited warranty. Durable polypropylene construction