Is 3/4 PEX big enough for main water line?

In general, the greater the distance from the manifold to the fixture, the wider the PEX tubing should be. A 3/8-inch line is sufficient for lengths up to 250 feet; 1/2-inch line will deliver adequate water pressure up to 350 feet; and 3/4-inch tubing is necessary to run a 500-foot line.

Should you use a manifold with PEX?

Do I Have to Use Manifolds with PEX? No. You can install PEX fittings supply just like you would other pipe, with main lines and branches to each fixture. But you lose a lot of the benefits of PEX with this system since it requires so many fittings.

Where do you place a PEX manifold?

Quote from the video:
Quote from Youtube video: At the wash machine body or at a fixture every time in case there is a break you want to be able to shut it off. So let's go to the install of this.

What is the purpose of a plumbing manifold?

Plumbing manifolds distribute hot and cold water to appliances around the property. Pipes run from the manifold to each piece of sanitary wear (such as sinks, baths, washing machines) in continuous loops to and from the manifold so that there are no fittings in the system other than at the appliance and manifold.

How many fixtures can 3/4 PEX supply?


For our example, our 1-inch pipe can have up to 30 fixture units, our 3/4-inch can have up to 14, and our 1/2-inch can have up to 4.

Should I upsize PEX?

There is a rule of thumb among contractors that when swapping out copper pipe for PEX the safest thing to do is upsize the PEX tubing. The thinking behind it is that replacing ¾” copper with 1″ PEX is a no-brainer way to ensure adequate pressure and performance.

How long do PEX manifolds last?

What is this? Most PEX systems are expected to last anywhere between 25 to 50 years when they are properly installed.

What is the advantage of a PEX manifold?

PEX Plumbing Manifold Benefits

Flexible PEX piping is a better insulator than copper and is not susceptible to rust. Manifold systems cut energy losses as hot water arrives faster at the tap, especially when a loop or ring is added to the system.

Can I use blue PEX for hot water?

Color-Coded: Red PEX pipes can be used for hot water supply lines, blue PEX for cold water supply, and white for either hot or cold. These colors are just for your convenience. Plumbing code does not require the pipe color to match the type of water supply.

Does PEX reduce water pressure?

At a rate of 8 feet per second, the CPVC fitting will cause less than 1% restriction in flow while PEX fittings create a 23% to 54% reduction in flow, depending on the fitting used.

Which type of pipe is used in a manifold system?

PEX piping

With a manifold system you use PEX piping. PEX piping is not labor intensive because there are less fittings, and PEX is joined by a mechanical means and does not use solvents or solder to join the fitting.