What is the thickness of Pipe required for Plumbing particularly for the first floor of the House?

Question

This is for the first floow construction regarding Plumbing works
My friends says One inch is sufficient. Some people says for
pressure (Particuarly on the top floow) you may require
between 1.25in ches or one and half inches is required. Kindly
englighten. Also whether GI pipes or PVC?

Answer 1

You would need to check with your area Building Codes. Every State is different. You can find the minimum requirements..

Answer 2

Domestic, home, water pressures tend to be 30 to 60 psi. Pipe used tends to be PVC in modern homes. Which floor is not an issue for the size of the pipe. Half inch is enough for any domestic system, unless you choose a larger size pipe for main line distribution with a smaller pipe for connection to a faucet, or some other connection point. The schedule of the pipe, which determines wall thickness of the pipe and the service pressure that it is rated for is of considerable importance. For domestic hot and cold water systems, schedule 40 is sufficient. This gives the best service, and the largest inside diameter. Schedule 20 pipe is thin wall and generally used for drains that connect to the heavier main drain pipes. Don't try to use schedule 20 to connect a toilet though. Not only will it not pass inspection, but could fail quickly with very messy results.

Answer 3

Either ground floor , first floor or any other floor , the diameter of pipe is not affected by the floor. Normally 3/4 inch and 1/2 inch dia. pipe is used for distributries and branches. Only G.I. pipes "medium" i.e. "B" class pipes should be used. If some contractor is constructing then he will tell the size and if any architect has designed then it is his duty to mention the details of the plumbing work also. ...... I M a civil engineer.

Answer 4

I normally run 3/4" main lines and tee off to each fixture with 1/2". Most water supply piping is schedule 40. No difference between 1st and 2nd floor plumbing. Galvanized iron pipe will cause more problems than it is worth. Use PVC for cold water lines and CPVC for hot water. (make sure your local codes allow PVC)

Answer 5

Around here, the same copper pipe is used on both floors. 1/2 or 3/4 in is common.

Answer 6

for residential use 1/2" hard copper for water inlet, use PVC pipes for drain. (2" for sink, 4" for toilet)