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Appendix B | 合法醫療器材資訊網

Appendix B

Combinationwasteandventsystemsareintendedprimarilyforextensivefloororshowerdraininstallationswhereseparateventingisnotpractical,forfloor ...

 Appendix B

A floor drain normally requires a 2 inch (50 mm) trap and waste. On a combination waste and vent system, both trap and waste shall be increased two pipe sizes (through 21/2 inches and 3 inches) (65 mm and 80 mm), which would make the trap 3 inches (80 mm). Pipe sizes recognized for this purpose are 2 inches, 21/2 inches, 3 inches, 31/2 inches, 4 inches, 41/2 inches, 5 inches, 6 inches, etc. (50 mm, 65 mm, 80 mm, 90 mm, 100 mm, 115 mm, 125 mm, 150 mm, etc.). The tailpiece between the floor drain and its trap shall be 2 inches (50 mm) (or normal size) to ensure that the amount of wastewater entering the trap partially fills the waste branch. A 3 inch (80 mm) floor drain would thus require a 4 inch (100 mm) trap, and a 4 inch (100 mm) floor drain would require a 5 inch (125 mm) trap for the reasons previously stated.

WHERE IN DOUBT, CHECK WITH YOUR LOCAL Authority Having Jurisdiction[20].

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Combination Waste and Vent System | 合法醫療器材資訊網
A combination waste and vent system shall only serve floor drains, sinks, lavatories and drinking fountains. A combination waste and vent system shall be​ ... Read More
Appendix B | 合法醫療器材資訊網
Combination waste and vent systems are intended primarily for extensive floor or shower drain installations where separate venting is not practical, for floor ... Read More
Combination Waste and Vent Systems | 合法醫療器材資訊網
Each combination waste and vent system, as defined in Chapter 2, shall be provided with a vent or vents adequate to ensure free circulation of air. A branch​ ... Read More
Methods of Venting Plumbing Fixtures and Traps in the 2018 ... | 合法醫療器材資訊網
Combination Waste and Vent System. A specially designed system of waste piping embodying the horizontal wet venting of one or more sinks or floor drains by ... Read More
Methods of venting plumbing fixtures and traps in the 2021 ... | 合法醫療器材資訊網
2020年8月24日 — The combination waste and vent system is based on the same premise as the ... It cannot serve as a drain for other fixtures—it is truly a dry vent. Read More
912.1 Permitted Combination Waste and Vent System. | 合法醫療器材資訊網
A combination waste and vent piping system, limited for use as a means of venting the traps of floor drains and laboratory sinks, shall be permitted in conjunction ... Read More
Combination Waste and Vent Systems | 合法醫療器材資訊網
2020年7月22日 — Fixtures must NOT receive waste from pumps or large equipment discharge. 3. Venting (910.3). □ Vent uppermost floor drain fixture. □ Vent must ... Read More
Combination Waste | 合法醫療器材資訊網
its vent is moved to a location within. 15 ft of the trap serving the floor drain. Every combination waste-and- vent branch will terminate at one of three locations: ... Read More
Drain-waste | 合法醫療器材資訊網
In modern plumbing, a drain-waste-vent (or DWV) is part of a system that allows air to enter a plumbing system to maintain proper air pressure to enable the ... Read More
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