Patent ID: 7156983

Claim:
A system for controlling fluid re-circulation to and from a fluid reservoir, said system comprising: a fluid reservoir; a fluid re-circulation conduit connected to said reservoir for directing fluid to and from said reservoir; a pump disposed in said conduit for pumping fluid through said re-circulation conduit; a fluid filter disposed in said re-circulation conduit at a position downstream of said pump; a drain conduit disposed in said re-circulation conduit, said drain conduit positioned adjacent said filter; a valve disposed in said re-circulation conduit, said valve having a body portion and including structure to divert the fluid from said re-circulation conduit to said drain conduit; a handle attached to said valve for manually moving said valve from a position wherein said fluid is re-circulated through said system to a position wherein said fluid is diverted to said drain conduit; an electrical timer for controlling operation of said pump; and a pair of electrical contacts for actuating said electrical timer, wherein one of said pair of electrical contacts is attached to said handle and one of said pair of electrical contacts is attached to said valve body.