# IFC class for swimming pool filter
**URL:** https://forums.buildingsmart.org/t/ifc-class-for-swimming-pool-filter/3408
**Category:** IFC
**Created:** [March 3, 2021, 4:55am UTC](https://forums.buildingsmart.org/t/ifc-class-for-swimming-pool-filter/3408 "2021-03-03T04:55:09Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@namio.sousa](https://forums.buildingsmart.org/u/namio.sousa)
#### Post date: [March 3, 2021, 4:55am UTC](https://forums.buildingsmart.org/t/ifc-class-for-swimming-pool-filter/3408/1 "2021-03-03T04:55:09Z")
Is there any IFC class for swimming pool filter?
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### Author:  [@Moult](https://forums.buildingsmart.org/u/Moult)
#### Post date: [March 3, 2021, 10:20am UTC](https://forums.buildingsmart.org/t/ifc-class-for-swimming-pool-filter/3408/2 "2021-03-03T10:20:43Z")
IfcFilter with predefined type of WATERFILTER.
If you are on IFC2X3, this is a great example you can use to persuade your team to upgrade 🙂 but if that’s not happening, use IfcFlowTreatmentDevice.
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### Author:  [@namio.sousa](https://forums.buildingsmart.org/u/namio.sousa)
#### Post date: [March 4, 2021, 12:42pm UTC](https://forums.buildingsmart.org/t/ifc-class-for-swimming-pool-filter/3408/3 "2021-03-04T12:42:24Z")
Thank you very much, @Moult. What about the pool bottom drain, skimmer, return device, suction device, and whirlpool device. Are there any specific classe for them?
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### Author:  [@Moult](https://forums.buildingsmart.org/u/Moult)
#### Post date: [March 5, 2021, 1:23am UTC](https://forums.buildingsmart.org/t/ifc-class-for-swimming-pool-filter/3408/4 "2021-03-05T01:23:09Z")
I don’t know much about pools, but the bottom drain would probably be an `IfcWasteTerminal`. The skimmer also sounds like an IfcFilter. Can you explain what a return device, suction device and whirlpool device is? At an uneducated guess from the names, suction device might be some form of IfcPump (there are some predefined types for submersible / suction things)? The whirlpool might also be a pump?