Drain valve assembly

1. A valve assembly for use in a floor drain, said valve assembly comprising:

a substantially cylindrical seal frame, the seal frame defining a seal frame wall and a support wall extending in the longitudinal direction of the seal frame;

a flexible sealing member located proximate a distal end of the seal frame; and

at least one attachment tab configured to secure the flexible sealing member to the seal frame,

wherein the seal frame wall and the support wall are further configured to create a resting deflection of the flexible sealing member, such that fluid may flow through the valve assembly in one direction, and the flow of gasses through the valve assembly is prevented in the opposite direction, and further comprising an elongate crossbar member configured to attach to the at least one attachment tab and directly trap the flexible sealing member against the support wall.

2. The valve assembly of claim 1 , wherein the support wall is on a diametral plane proximate the center of the seal frame.

3. The valve assembly of claim 1 , wherein the support wall only extends a portion of the longitudinal length of the seal frame.

4. The valve assembly of claim 1 , wherein the seal frame wall includes a stepped section located on an inner surface thereof configured to support an outer edge portion of the flexible sealing member.

5. The valve assembly of claim 1 , wherein the seal frame wall includes a plurality of sealing ribs located on at least a portion of an outer surface of the seal frame wall.

6. The valve assembly of claim 5 , wherein the plurality of sealing ribs extend more than half the longitudinal length of the seal frame wall.

7. The valve assembly of claim 5 , wherein the seal frame wall includes at least three sealing ribs.

8. The valve assembly of claim 1 , wherein the support wall includes the at least one attachment tab extending downwardly from a distal end of the support wall.

9. The valve assembly of claim 8 , wherein the at least one attachment tab of the support wall comprises two attachment tabs, and the crossbar member includes two receiving features, and wherein the attachment tabs of the support wall and the receiving features of the crossbar member are configured to removably secure the flexible sealing member to the seal frame.

10. The valve assembly of claim 8 , wherein the at least one attachment tab of the support wall comprises two attachment tabs, and the crossbar member includes two receiving features, and wherein the attachment tabs of the support wall and the receiving features of the crossbar member are configured to permanently secure the flexible sealing member to the seal frame.

11. A method of constructing a valve assembly for use in a floor drain, said method comprising:

forming a substantially cylindrical seal frame, the seal frame defining a seal frame wall and a support wall extending in the longitudinal direction of the seal frame;

locating a flexible sealing member proximate a distal end of the seal frame; and

securing the flexible sealing member to the seal frame with at least one attachment tab,

wherein the seal frame wall and the support wall are further configured to create a resting deflection of the flexible sealing member, such that fluid may flow through the valve assembly in one direction, and the flow of gasses through the valve assembly is prevented in the opposite direction, and further providing an elongate crossbar member, and attaching the crossbar member to the at least one attachment tab to directly trap the flexible sealing member against the support wall.

12. The method of constructing a valve assembly of claim 11 , wherein the support wall is on a diametral plane proximate the center of the seal frame.

13. The method of constructing a valve assembly of claim 11 , wherein the support wall only extends a portion of the longitudinal length of the seal frame.

14. The method of constructing a valve assembly of claim 11 , wherein the seal frame wall includes a stepped section located on an inner surface thereof configured to support an outer edge portion of the flexible sealing member.

15. The method of constructing a valve assembly of claim 11 , wherein the seal frame wall includes a plurality of sealing ribs located on at least a portion of an outer surface of the seal frame wall.

16. The method of constructing a valve assembly of claim 15 , wherein the plurality of sealing ribs extend more than half the longitudinal length of the seal frame wall.

17. The method of constructing a valve assembly of claim 15 , wherein the seal frame wall includes at least three sealing ribs.

18. The method of constructing a valve assembly of claim 11 , wherein the support wall includes the at least one attachment tab extending downwardly from a distal end of the support wall.

19. The method of constructing a valve assembly of claim 18 , wherein the at least one attachment tab of the support wall comprises two attachment tabs, and wherein the crossbar member includes two receiving features, and wherein the attachment tabs of the support wall and the receiving features of the crossbar member are configured to removably secure the flexible sealing member to the seal frame.

20. The method of constructing a valve assembly of claim 18 , wherein the at least one attachment tab of the support wall comprises two attachment tabs, and wherein the crossbar member includes two receiving features, and wherein the attachment tabs of the support wall and the receiving features of the crossbar member are configured to permanently secure the flexible sealing member to the seal frame.