While finalizing a vendor for your water plant, you can follow this simple process :-
- Be ready with specifications
- Ask references from peers
- Go to Google , Indiamart & other sites
- Check their reputation
- Shortlist 3 of them
- Insist for an installation visit
- Compare & Appoint
- Be clear with contract terms
Don't go into emotional decisions.
You should take intelligent decision, not emotional. Wait for 48 hours before arriving at decisions. Just finalizing something in a hurry might land into troubles later on. Take Calculated decisions.