# vtkmCleanGrid - non VTK-m version?
**URL:** https://discourse.vtk.org/t/vtkmcleangrid-non-vtk-m-version/1483
**Category:** Support
**Created:** [August 4, 2019, 8:09pm UTC](https://discourse.vtk.org/t/vtkmcleangrid-non-vtk-m-version/1483 "2019-08-04T20:09:30Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@banesullivan](https://discourse.vtk.org/u/banesullivan)
#### Post date: [August 4, 2019, 8:09pm UTC](https://discourse.vtk.org/t/vtkmcleangrid-non-vtk-m-version/1483/1 "2019-08-04T20:09:30Z")
Is there a non-VTK-m version of [`vtkmCleanGrid`](https://vtk.org/doc/nightly/html/classvtkmCleanGrid.html)?
I’m looking for a standard VTK algorithm to clean unstructured grids
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### Author:  [@RobertMaynard](https://discourse.vtk.org/u/RobertMaynard)
#### Post date: [August 6, 2019, 7:17pm UTC](https://discourse.vtk.org/t/vtkmcleangrid-non-vtk-m-version/1483/2 "2019-08-06T19:17:02Z")
I know that ParaView has `vtkCleanUnstructuredGrid` which supports cleaning input unstructured grids in a single filter.
For VTK I think the easiest approach is chaining `vtkMergePoints` and `vtkMergeCells`.
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### Author:  [@banesullivan](https://discourse.vtk.org/u/banesullivan)
#### Post date: [August 6, 2019, 10:09pm UTC](https://discourse.vtk.org/t/vtkmcleangrid-non-vtk-m-version/1483/3 "2019-08-06T22:09:46Z")
Thanks for that tip! I’ll check out the source code for ParaViews clean filter and try out the chain you suggest
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### Author:  [@banesullivan](https://discourse.vtk.org/u/banesullivan)
#### Post date: [August 7, 2019, 12:57am UTC](https://discourse.vtk.org/t/vtkmcleangrid-non-vtk-m-version/1483/4 "2019-08-07T00:57:09Z")
I just implemented a rough clean algorithm for UnstructuredGrids over in [https://github.com/pyvista/pyvista/pull/355](https://github.com/pyvista/pyvista/pull/355)
It’s in Python and has some `for` loops that need to be vectorized but it works!!
I put an example in that pull request