AU2020203438B2

AU2020203438B2 - Boss gully trap

Info

Publication number: AU2020203438B2
Application number: AU2020203438A
Authority: AU
Inventors: Thomas Colin LOWE; Duane Brian RICE; Faafetai TULAGA; Darien James Eliot WARBURTON
Original assignee: Marley New Zealand Ltd
Current assignee: Marley New Zealand Ltd
Priority date: 2019-05-28
Filing date: 2020-05-26
Publication date: 2025-11-27
Anticipated expiration: 2040-05-26
Also published as: EP3744914A1; AU2020203438A1

Abstract

A boss gully trap, comprising: a body comprising: an open top; a closed end; one or more inlets configured to be connected to pipes and/or fittings; and an outlet configured to be connected to a pipe and/or a fitting; a trap configured to be 5 mounted in the body, the trap comprising: an inlet; and an outlet; wherein when the trap is mounted in the body, the distance between the closed end of the body and the inlet of the trap is about 5 mm to about 10 mm.

Description

2/2 26 May 2020 May 2020

250 110

221 111 2020203438 26

150 2020203438

223 223 142 222 141 141

220 220 240 140 240 143 143 151 151 130 130 230 230 120 120 200 200

100 100 121 121

210 210

FIG. 3

250 250 221 221

223 223

200 200 220 220

240

210 210

FIG. 4 FIG. 4

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BOSS GULLY TRAP FIELD

This relates to a boss gully trap.

BACKGROUND BACKGROUND

5 Buildings typically have a drainage system to move waste water from the building

to an external discharge network. To prevent foul air from the discharge network escaping into the building through the drainage system, the drainage system can

have one or more traps with water seals.

SUMMARY SUMMARY 10 In one example embodiment, there is provided a boss gully trap, comprising: a

body comprising: an open top; a closed end; one or more inlets configured to be connected to pipes and/or fittings; and an outlet configured to be connected to a

pipe and/or a fitting; a trap configured to be mounted in the body, the trap comprising: an inlet; and an outlet; wherein when the trap is mounted in the body,

15 the distance between the closed end of the body and the inlet of the trap is about 5 mm 5 to about mm to about 10 10 mm. mm.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described by way of example with reference to the drawings, which show some embodiments of the invention. However, these are provided for 20 illustration only. The invention is not limited to the particular details of the

drawings and the corresponding description.

Figure 1 shows a view of a boss gully trap according to an embodiment.

Figure 2 shows an isometric view of the boss gully trap.

Figure 3 shows a sectional view of the boss gully trap through A-A.

25 Figure 4 shows an isometric view of a trap of the boss gully trap.

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DETAILED DESCRIPTION

In one embodiment, there is provided a boss gully trap which is configured to be May relatively compact, provide a sufficient water seal to prevent foul air escaping, and to have a sufficient flow rate of waste water with solid matter through the outlet.

5 Figure 1 shows a side view of the boss gully trap according to an embodiment. Figure 2 shows an isometric view of the boss gully trap. Figure 3 shows a sectional

view of the boss gully trap through A-A in Figure 1.

The body 100 is hollow and has an open top 110. This is configured to connect to

a riser pipe, which can be part of a vent stack. This may involve the open top 110

10 having a dimension sufficient to receive the riser pipe with a shoulder 111 to limit the depth of insertion of the riser pipe. For example, the open top 110 may be

configured to receive a nominally 100 mm riser pipe. This may provide a friction fit with the riser pipe, and is typically sealed using solvent cement or the like.

The body 100 has a closed end 120 opposing the open top 110. The closed end 15 120 may have a flat external base 121 to allow the closed end 120 to sit in a stable

manner. The corners of the closed end 120 may be rounded to reduce the risk of material being caught in the corners.

The body 100 has a wall 130 between the open top 110 and the closed end 120.

The wall 130 may gradually narrow from a broader open top 110 to a narrower closedend 20 closed 20 end120. 120.

The body 100 has one or more inlets 140 which are configured to attach to pipes or other fittings of a drainage system. For example, the pipes or other fittings may

fit within each inlet. Each inlet 140 may have a shoulder 141which limits the depth of insertion of each pipe or fitting.

25 The inlets 140 may be different diameters. For example, the body 100 may have

three inlets 140 distributed around the body 100 with a spacing of about 90

degrees. Two opposing inlets 140 may have a nominal diameter of around 40 mm and an inlet positioned between the two opposing inlets may have a nominal diameterofof around diameter around5050mm. mm.

Initially, the one or more inlets 140 may be closed with a cover 142. The cover 142 prevents passage through the inlet 140. In use, when a selected inlet 140 is

intended to be used, the cover 142 from that inlet 140 may be removed by cutting, piercing, snapping, or another method. The covers 142 prevent waste water from

passing out of an inlet 140 that is not connected to a pipe or other fitting.

The body 100 has an outlet 150 which is configured to attach to pipes or other

fittings of a drainage system leading towards an external discharge network. For

example, the pipes or other fittings may fit within the outlet 150.

The bottom edge 151 of the outlet 150 may be lower than the bottom edge 143 of

any of the inlets 140. In addition, the inlets 140 may be sloped towards the body 100 and the outlet 150 may be sloped away from the body 100. This means that

waste water will typically pass out of the outlet 150 rather than flowing back through an inlet 140.

The body 100 may be formed of any suitable material, such as unplasticised polyvinyl chloride (UPVC). The overall height of the body 100 may be 200 mm or

less. less.

Figure 4 shows an isometric view of the trap 200.

A trap 200 may be provided for mounting inside the body 100. In this case, "mounting" may mean integrally formed with the body 100, or separately formed

from the body 100 but removably attached from the body 100, or separately

formed from the body 100 but permanently attached to the body 100. In the displayed embodiment, the trap 200 is separately formed from the body 100 and removably attachable to the body 100.

The trap 200 has an inlet 210 with a flared end. The inlet 210 is configured to be

positioned near the closed end 120 of the body 100.

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The trap 200 has an outlet 220 which is configured to positioned within the outlet 150 of the body 100. Projections 221 around the outlet 220 may be provided to

limit the depth of insertion of the outlet 220 into the outlet 150 of the body 100. The outlet 220 may have a recess 222 near its end for receiving a sealing ring 223.

5 The trap 200 has a wall 230 between the inlet 210 and the outlet 220. The wall 230 may be shaped so that the inlet 210 is at an angle relative to the outlet 220. For

example, the angle may be around 110 degrees.

An internal wall 240within the trap 200 projects from the bottom of the outlet 220

and obstructs part of the outlet 220. The internal wall 240 increases the effective

10 vertical distance between the inlet 210 and the outlet 220. That is, due to the internal wall 240, the water level must rise to a greater height to pass out of the

outlet 220 compared to if the internal wall 240 were omitted.

A pull ring 250 is provided on the top of the trap 200. The pull ring 250 is sized to

receive one or more fingers of a user. This allows a user to get sufficient grip to 15 detach the trap 200 for cleaning or replacement.

The trap 200 may be formed of any suitable material, such as unplasticised polyvinyl chloride (UPVC).

When the trap 200 is mounted in the body 100, the inlet 210 is positioned near

the closed end 120 of the body 100. The sealing ring 223 is positioned between 20 the outer face of the outlet 220 and the inner face of the outlet 150. This may

prevent waste water from leaking from the outlet 150 back into the body 100 and also may provide a friction fit between the outlet 150 and the outlet 220.

The distance between the inlet 210 and the closed end 120 (specifically, the distance between the lowest edge of the inlet 210 and the inner face of the closed 25 end 120) may be between about 5 mm to about 10 mm, or preferably between

about 7 mm to 8 mm, or about 7.4 mm.

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In addition, the distance between the inner face of the closed end 120 and the top of the internal wall 240 may be about 90 mm. This allows a sufficient level of water

to be retained within the body 100 and therefore provides a sufficient water seal in use. in use.

5 Operation

In use, the boss gully trap is oriented so that the open top 110 is pointed

substantially upwards. One or more inlets 140 of the body are connected to pipes or fittings in a building. The inlets 140 receive waste water, for example from

domestic appliances. The waste water passes through the inlet 140 into the body

10 100. The level of the waste water within the body 100 rises until it reaches the top of the internal wall 240. The waste water then exits through the outlet 150, and

subsequently into pipes or fittings towards a discharge network. The level of waste water within the body 100 is sufficient to provide a water seal, which prevents foul

air passing through the outlet 150 into the body 100 and subsequently into the 15 building. The open top is connected to a riser pipe. This may ultimately lead to a

vent stack, which allows excess gases to be vented to prevent the gases affecting the operation of the drainage system or the efficacy of the water seal.

Results

The configuration of the boss gully trap has been selected to optimise three 20 features. First, the height of the body 100 is intended to be minimised, to allow

the boss gully trap to be used in buildings where the distance between floors is relatively limited. Second, the height of the water level is intended to be sufficient

to provide to provide a robust water seal. Third, the flow rate from body 100 to the outlet 150 must be sufficient to prevent the boss gully trap from backing up in use 25 and allow sufficient clearing of solids within the waste water.

The described boss gully trap was tested against other boss gully traps. Each other

boss gully trap had a similar water seal and overall height. The distance between

the inlet 210 and the closed end 120 (or otherwise the minimum gap through which waste water must pass) of the other traps varied.

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Water passed into each boss gully trap at 8 L/min ± 0.2 L/min. Clay mix cat litter was introduced into each boss gully trap in a number of doses to simulate the

entrance of solid matter in use. Once the level of water within the body began to rise (indicating an insufficient flow rate), the test was terminated, and the level of

5 remaining clay mix cat litter was measured.

Total dose Total dose before before Remaining dose after insufficient flow insufficient flow termination termination

Described embodiment Described embodiment 900 ml 900 ml 250 ml 250 ml

Existing system 1 450 ml 450 ml 150 ml 150 ml

Existing system 2 300 ml 50 ml

Existing system 3 500 ml 200 ml

It was therefore found that the described boss gully trap provided superior solid matter clearance rates. It maintained a sufficient flow rate for a greater level of

solid matter than other comparable boss gully traps. In addition, a greater level of

solid matter could be retained within the body before flow rates are affected. The test 10 test 10 therefore therefore shows shows that that a reduced a reduced distance distance between between the inlet the inlet 210 210 and and the closed the closed

end 120 unexpectedly improves the performance compared to the different ranges of comparable systems.

Interpretation

The term "comprises" and other grammatical forms is intended to have an

15 inclusive meaning unless otherwise noted. That is, they should be taken to mean an inclusion of the listed components, and possibly of other non-specified

components or elements.

A reference to prior art or existing systems is not to be construed as an admission that such prior art or existing systems is public or that is forms part of the common

20 general knowledge.

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The present invention has been illustrated by the description of some embodiments. While these embodiments have been described in detail, this

should not be taken to restrict or limit the scope of the claims to those details. Additional advantages and modifications will readily appear to those skilled in the

5 art. Therefore, the invention in its broader aspects is not limited to the specific details of the illustrative examples shown and described. Accordingly, modifications may be made to the details without departing from the spirit or scope ofthe generalinventive concept.

Claims

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CLAIMS CLAIMS

1. A boss gully trap, comprising:

a body comprising:

an open top;

55 a closed end;

one or more inlets configured to be connected to pipes and/orfittings;

and and

an outlet configured to be connected to a pipe and/or a fitting;

a trap configured to be mounted in the body, the trap comprising:

10 10 an inlet; and

an outlet;

wherein when the trap is mounted in the body, the distance between the

closed end of the body and the inlet of the trap is about 5 mm to about 10 mm. mm.

15 2. The boss gullytrap of claim 1, wherein when the trap is mounted in the body, the distance between the closed end of the body and the inlet of the trap is about

7 mm 7 to about mm to about 88 mm. mm.

3. The boss gullytrap of claim 1, wherein when the trap is mounted in the body, the distance between the closed end of the body and the inlet of the trap is about 20 7.4 mm.

4. The boss gully trap of any of claims 1 to 3, wherein the outlet of the trap is

configured to fit inside the outlet of the body, and a sealing ring is provided between the outlet of the trap and the outlet of the body.

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5. The boss gully trap of any of claim 4, wherein the outlet of the trap comprises:

one or more projections configured to limit the insertion of the outlet of the trap into the outlet of the body.

5 6. The boss gully trap of any of claims 1 to 5, wherein the trap comprises:

an internal wall configured to increase the effective vertical distance

between the inlet of the trap and the outlet of the trap.

7. The boss gullytrap of claim 6, wherein when the trap is mounted in the body, the vertical distance between the top of the internal wall and the closed end of the

10 body is about 90 mm.

8. The boss gullytrap of anyof claims 1to 7, wherein the open top is configured

to connect to a riser pipe.

9. The boss gully trap of any of claims 1 to 8, wherein the one or more inlets

comprise at least two inlets of different diameters.

15 10. The boss gully trap of any of claims 1 to 9, wherein the height of the body is

less than less than about 200 mm. about 200 mm.

11. The boss gully trap of any of claims 1 to 10, wherein the trap comprises a pull

ring configured to receive one or more fingers of a user.

12. The boss gully trap of any of claims 1 to 11, wherein one or more of the inlets 20 of the body are sealed with a cover.

13. The boss gully trap of any of claims 1 to 12, wherein the trap is configured to be removable from the body.

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14. The boss gullytrap of any of claims 1 to 13, wherein the body and/or the trap are formed of UPVC.

15. A boss gully trap substantially as herein described with reference to the drawings.