What size are water heater supply lines?

¾ inch diameter and 16-24 inch length supply lines are ideal for water heaters. And, it has some advantages that make it more user-friendly. Although people also use ½ inch diameter supply lines in the older water heaters. These are all you need to know about supply line size in short.

Can you use a flex line on a water heater?

You can use flexible gas tubes or water pipes for a gas water heater in most states. In states with earthquakes, they can even be mandatory. If your existing gas pipe has CSST (corroded stainless steel tubes) or has not been glued, the connection should be replaced right away.

What type of pipe is used for water heaters?

CPVC pipes are an ideal choice for hot water plumbing. They are made after adding material that goes through extra chlorination process which gives CPVC higher quality.

Can Sharkbites be used on hot water lines?

Yes, you can use SharkBite fittings on hot water lines. Remember, however, that they only work with copper, PEX, and CPVC pipes.

Can you use a hose to connect a water heater?

A garden hose is a useful tool that can be connected directly to the hot water heater to drain the water and sediment inside.

Can you use a flexible gas line on a water heater in Illinois?

Unlike in other states, in Illinois, flexible gas connectors they can not be used for any stationary appliances, permanently secured in place, like furnaces, boilers, water heaters, which require rigid pipe for final connection.

Can I use PEX on a hot water heater?

Can I Connect PEX to My Water Heater? PEX can’t be directly connected to a water heater. First extend a pipe 18 in. from your water heater and connect the PEX to the pipe.

Can Blue PEX be used 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.

Can you use compression fittings on a hot water heater?

For ease of removing the water heater for service or replacement, use compression fittings to connect the water pipes. If you are soldering copper pipes, use dielectric unions to connect the pipes to the water heater.

What size are the water fittings on a hot water heater?

Most of the water heater inlet size comes with ¾” or ½” diameter. ½” is a common measurement for old households. These days most water heater supply lines require ¾” diameter inlet size. For a tankless water heater, the size mostly varies from ¾ inch to 1 inch.

Is dielectric union needed on water heater?

Dielectric Unions



It keeps the pipes from actually touching each other because, when they do, they create a corrosive electric charge that deteriorates the pipes and causes leaks. Both the hot and cold water pipes must have this fitting — it’s a code requirement.