FAQ: How To Install Shower Water Supply?

Can I use pex for shower plumbing?

When doing a shower/tub valve — you can use PEX for the hot and cold supply and for the leg that goes from the shower head but NOT to the tub spout.

What plumbing is needed for a shower?

The water supply for a shower arrives via two pipes: hot and cold. In construction that is less than 30 years old, these pipes are usually copper. The pipes connect to a shower valve that controls the temperature and flow of water to the shower head.

How do you install a shower valve?


  1. Remove the Old Valve. Begin by turning off the water and removing the old shower valve.
  2. Disassemble the New Valve. Remove the plastic cartridge and any housing from the valve body before beginning installation.
  3. Prepare the Valve.
  4. Position the Valve.
  5. Solder the Fittings.
  6. Install the Valve Cartridge.
  7. Finish Up.

Can you use flexible hose for shower?

From above, below or behind the shower can take the incoming supply. It’s possible to make things simpler by using flexible braided hose connections on a shower.

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Why is PEX plumbing bad?

PEX plumbing system has been used for more years and therefore its failures has been observed and known. Its major failures is linked to piping and fitting. Piping fails when the pipes are exposed to chlorine that is within the water, exposure to direct sunlight before its installation.

Is 1 2 PEX OK for shower?

As long as the supply lines for the shower tie into a 3/4″ line, 1/2″ will be fine. I use a Delta shower faucet that already has pex adapters made into the valve body, no threading or sweating, just crimp and you’re done.

How do you test rough in shower plumbing?

Once the showerhead pipe has been plugged, turn on the shower valve. With the flow of water or air blocked, pressure will build up and the valve can be inspected for leaks. A water leak can range from a small drip to a steady spray or stream of water, while an air-test leak will be clearly audible.

How much does it cost to install a shower valve?

The average cost to replace a shower valve is $310 if you hire a plumber to replace the stem and internal parts. An entire shower valve replacement costs are closer to $540 installed, on average, which includes removing the old broken valve, the cost of the new valve, as well as any other parts and labor costs.

Does shower water go to sewer?

The water that falls over from the shower goes down the drain into a sewer system. At the same time, the drain is designed in such a way that it prevents the back up of sewer gases into the bathroom.

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How far out should a shower valve be installed?

Your goal is to center the shower valve between studs 12 inches apart. The handle sticks out about 3.75 inches+ from the finished wall ( the gap between the handle cover and the wall plate is about 1 1/4 inch.

What are the different types of shower valves?

Here is an overview of the primary types of shower valves available:

  • Pressure-Balancing Valves. Pressure-balancing valves are the most frequently used type of valve.
  • Diverter Valves.
  • Thermostatic Valves.
  • Mixing Valves.
  • Transfer Valves.

What are stops on a shower valve?

Stops Allow the Valve to Be Isolated Several shower valves now have stops, or shut-off devices, built in. This allows the water to be turned off right at the faucet, isolating it and permitting the water to the rest of the house or building to remain on.

Do flexible hoses restrict flow?

If you have a low pressure system, do not use flexible pipes as they restrict the flow far too much. The water doesn’t keep flowing into the hose. It fills the hose up and then stops.

Are flexible tap connectors any good?

Flexible hoses are very versatile and significantly reduce the time it takes to hook-up hot and cold water pipe appliances, such as taps, dishwashers and water heaters. Yet the experiences of attendees at the workshop suggest some flexible hoses are bursting within a couple of months of installation.

Are flexi hoses safe?

The good news is, water damage from flexi hoses is preventable. Replace the flexible hoses every 5 years and be sure to check the warranties on anything you purchase. Better still consider replacing your flexible braided hoses with copper plumbing to the taps before they reach their shelf life.

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