Main Water Supply Line Size

There are three main factors that determine the correct water supply line size which is also referred to as the water service line.

Main water supply line size.

The tables below can be used to size building supply and branch lines and meter and service lines. The water line size is vital to providing adequate volume of water to the occupants of a building. 1 inch pipe less than 100 feet to a house is good. The three factors are as follows.

If you are installing a new domestic water line smaller than 3 nyc plumbing code reads that the tap must be one size smaller than the size of the pipe. But they actually simplify plumbing runs and reduce possible leaks by eliminating the need for tees and other fittings between the main supply line and the fixture. Size water line tips. What if you have a leak in your kitchen in your kitchen or bathroom do you know where to go to turn off the water to your house.

With the water supply fixture units system defined by the uniform plumbing code upc there are tables available where the total demand calculated by adding each units water supply fixture units wfsu are compensated to an expected demand. Find out how in this video. If you are installing a 1 water main you can connect to the existing tap. The standard when replacing old water supply lines with pex is to use the same size.

Bigger is better if you want lots of water in a short time. Size water line videos below. For adequate water flow it s a good idea to install 1 2 inch or 3 4 inch pex for your main lines. The branch lines which are the ones that feed individual fixtures are 1 2.

8 inch diameter water main supplies. This rule may be subject to change if you are replacing an existing water main. The main pipes which are the ones that come off the main water supply and the water heater are 3 4 inches in diameter. A calculation using all of the plumbing fixtures in a.

Larger diameter water lines create less friction.