Assembly for wastewater treatment

1. An apparatus comprising:

a distribution conduit, the distribution conduit defining an aperture;

a diffuser body, the diffuser body defining a mating tube, at least a portion of the mating tube passing through the aperture, and the mating tube defining a mating tube passage therethrough with an inside sidewall, a normally tapered portion of which is tapered when not pressed outward; and

an insert, the insert at least partially disposed in the mating tube passage and defining an externally tapered portion pressing against the normally tapered portion of the inside sidewall so as to cause the mating tube to expand such that removal of the mating tube from the distribution conduit is inhibited.

2. The apparatus of claim 1 , wherein the diffuser body further comprises an anti-torque projection, the anti-torque projection projecting from a surface of the diffuser body and defining a peripheral edge substantially conforming to an outside contour of the distribution conduit.

3. The apparatus of claim 1 , wherein the distribution conduit is formed of a material harder than a material forming the mating tube.

4. The apparatus of claim 1 , further comprising a sealing ring, the sealing ring comprising an elastomeric material, encircling at least a portion of the mating tube, and disposed between the mating tube and the distribution conduit.

5. The apparatus of claim 1 , wherein:

the distribution conduit comprises at least one of steel, polyvinylchloride, polypropylene, polyethylene, and acrylonitrile butadiene styrene; and

the mating tube comprises at least one of polyethylene, polypropylene, polyvinylchloride, and acrylonitrile butadiene styrene.

6. The apparatus of claim 1 , wherein the mating tube defines a proximal portion and a distal portion, the distal portion having a smaller outside diameter or width than the proximal portion.

7. The apparatus of claim 6 , wherein the proximal portion has an outside diameter or width too large to fit through the aperture.

8. The apparatus of claim 1 , further comprising a diffuser membrane, the diffuser membrane mounted to the diffuser body.

9. The apparatus of claim 1 , wherein the insert defines an interior passage therethrough, the interior passage in gaseous communication with an inside of the distribution conduit.

10. The apparatus of claim 1 , wherein:

the mating tube passage defines a set of inside threads;

the insert comprises a first insert portion and a second insert portion, the first insert portion being discrete and separable from the second insert portion;

the first insert portion defines a set of outside threads, at least a portion of the set of outside threads threadably engaged with at least a portion of the set of inside threads; and

the first insert portion presses against the second insert portion.

11. An apparatus comprising:

a distribution conduit, the distribution conduit defining an aperture;

a diffuser body, the diffuser body defining a mating tube, at least a portion of the mating tube passing through the aperture, and the mating tube defining a mating tube passage therethrough with an inside sidewall; and

an insert, the insert at least partially disposed in the mating tube passage and pressing against the inside sidewall so as to cause the mating tube to expand such that removal of the mating tube from the distribution conduit is inhibited;

wherein:

the insert comprises a first insert portion and a second insert portion, the first insert portion being discrete and separable from the second insert portion;

the first insert portion defines a shaft with a set of outside threads,

the second insert portion defines a channel with a set of inside threads;

the shaft at least partially occupies the channel, and at least a portion of the set of outside threads threadably engage at least a portion of the set of inside threads such that rotating the first insert portion causes the second insert portion to translate along the shaft; and

the second insert portion presses against the inside sidewall so as to cause the mating tube to expand such that removal of the mating tube from the distribution conduit is inhibited.

12. An apparatus for use in combination with a distribution conduit defining an aperture, the apparatus comprising:

a diffuser body, the diffuser body defining a mating tube, at least a portion of the mating tube adapted to pass through the aperture, and the mating tube defining a mating tube passage therethrough with an inside sidewall, a normally tapered portion of which is tapered when not pressed outward; and

an insert, the insert adapted to be at least partially disposed in the mating tube passage with at least a portion of the mating tube passing through the aperture, and defining an externally tapered portion adapted to press against the normally tapered portion of the inside sidewall so as to cause the mating tube to expand such that removal of the mating tube from the distribution conduit is inhibited.

13. The apparatus of claim 12 , wherein the mating tube defines a proximal portion and a distal portion, the distal portion having a smaller outside diameter or width than the proximal portion.

14. The apparatus of claim 13 , wherein the distal portion has a diameter or width smaller than that of the aperture when the insert is not disposed in the mating tube passage.

15. The apparatus of claim 12 , wherein the diffuser body is adapted to support a diffuser membrane.

16. The apparatus of claim 12 , wherein:

the mating tube passage defines a set of inside threads;

the insert comprises a first insert portion and a second insert portion, the first insert portion being discrete and separable from the second insert portion;

the first insert portion defines a set of outside threads; and

with at least a portion of the mating tube passing through the aperture and with at least a portion of the set of outside threads threadably engaging at least a portion of the set of inside threads, the first insert portion is adapted to press against the second insert portion inside the mating tube passage.

17. An apparatus for use in combination with a distribution conduit defining an aperture, the apparatus comprising:

a diffuser body, the diffuser body defining a mating tube, at least a portion of the mating tube adapted to pass through the aperture, and the mating tube defining a mating tube passage therethrough with an inside sidewall; and

an insert, the insert adapted to be at least partially disposed in the mating tube passage with at least a portion of the mating tube passing through the aperture, and to press against the inside sidewall so as to cause the mating tube to expand such that removal of the mating tube from the distribution conduit is inhibited;

wherein:

the insert comprises a first insert portion and a second insert portion, the first insert portion being discrete and separable from the second insert portion;

the first insert portion defines a shaft with a set of outside threads;

the second insert portion defines a channel with a set of inside threads; and

with at least a portion of the mating tube passing through the aperture and with at least a portion of the set of outside threads threadably engaging at least a portion of the set of inside threads so that rotating the first insert portion causes the second insert portion to translate along the shaft, the second insert portion is adapted to be at least partially disposed in the mating tube passage and to press against the inside sidewall so as to cause the mating tube to expand such that removal of the mating tube from the distribution conduit is inhibited.