Patent ID: 8006325

Claim:
A pumped shower drain system comprising: a shower base ( 12 ); a waste water unit ( 14 ) provided on the shower base ( 12 ) and having a waste water inlet ( 28 ) and a waste water outlet ( 30 ); and a reciprocating water pump ( 20 ) for pumping water from the waste water unit ( 14 ) to a drain, the reciprocating water pump ( 20 ) including: a pump housing ( 40 ) having a pump inlet ( 48 ) in liquid communication with the waste water outlet ( 30 ) of the waste water unit ( 14 ), and a pump outlet ( 50 ) in liquid communication with the drain; first and second inlet valve seals ( 56 , 58 ) in spaced relationship, the inlet valve seals ( 56 , 58 ) being different kinds of seals from each other and being independently closable to close the pump inlet ( 48 ); and first and second outlet valve seals ( 84 , 86 ) in spaced relationship, the outlet valve seals ( 84 , 86 ) being different kinds of seals from each other and being independently closable to close the pump outlet ( 50 ).