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i know3 (type K) and (type L) and (type M)--Some project (type L) is required .
Types of Copper pipes and their uses are as follows:
1. Type K: Generally used for high pressure refrigerant tubes in condenser and evaporator
2. Type L: Used for hydronic chilled water piping in supply and return
3. Type M: Used for Low pressure plumbing applications
4. Type DMV: For sewer and drainage applications
Hard and soft copper pipes used in HVAC DX system for Gas and Liquid Lines. It can also be used Plumbing system for Hot water supply.