Hi, Selvan murugesan Murugesan,

 

With out details regarding your listing and were you are located it is hard to say the exact wording. I say this since the list can vary world wide. Here is the US I like the category of "Water filter supplier". The Guidelines for representing your business on Google categories section has  a good description of how google handles it. 

 

"You should focus primarily on adding the most specific categories for your business; we'll do the rest behind the scenes. For instance, when you select a specific category like "Golf Resort", Google implicitly includes more general categories like "Resort Hotel", "Hotel", and "Golf Course." Feel free to skip adding any category that seems redundant with a more specific category you selected. If you can't find a category for your business, choose one that is more general. Google can also detect category information from your website and from mentions about your business throughout the web.

 

Good complete details of your service on your website helps tell google about your business.

For additional category ideas search competitors listings across the area and see what they are using and how they are ranking in Google Maps search results. 

 

 

Thanks For Asking,

 

David W Cox

 

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