Riobel service and stop valves

Used in:

• Pressure balanced valves
  • Until 2004
• Thermostatic valves R22 (1/2")
  • Until Aug 2007
• Thermostatic valves R32 (3/4")
  • Until Oct 2008

Removal: 

1. Water supply to valve must be turned off. (see Preparation) 
2. Block drain or wall hole to prevent losing parts.
3. Unscrew the valve hexagonal nut with a 13mm (≈1/2") socket.

Cleaning:

• Soak in a 1/2 water 1/2 vinegar solution for a couple of hours if they are stuck

Reinstallation:

1. Assemble as above (3-2-1) and screw the hexagonal nut (1) clockwise all the way.
2. Turn water supply on and check for leaks.

To open: Using a flathead screwdriver, turn the center screw counterclockwise until it sits flush to the rim.

To close: Using a flathead screwdriver, turn the center screw clockwise all the way inside. 

Used in:

• Thermostatic valves 22-42 (1/2")
  • After Aug 2007
• Thermostatic valves 32 (3/4")
  • After Oct 2008

Removal: 

1. Water supply to valve must be turned off. (see Preparation) 
2. Block drain or wall hole to prevent losing parts.
3. Unscrew the valve hexagonal nut with a 16mm (≈5/8") socket

Cleaning:

• Soak in a 1/2 water 1/2 vinegar solution for a couple of hours if they are stuck

Reinstallation:

1. Assemble as above (3-2-1) and screw the hexagonal nut (1) clockwise all the way.
2. Turn water supply on and check for leaks.

To open: Using a flathead screwdriver, turn the center screw counterclockwise until it sits flush to the hex nut. 

To close: Using a flathead screwdriver, turn the center screw clockwise all the way inside. 

Used in:

• Pressure balanced valve
  • 2004 to 2014
• Thermostatic and pressure balanced coaxial valves (1/2")
  • 2004 to 2014 

Removal: 

1. Water supply to valve must be turned off. (see Preparation) 
2. Block drain or wall hole to prevent losing parts.
3. Unscrew the hexagonal nut with an adjustable wrench.
4. With pliers, pull out service valve

Cleaning:

• Soak in a 1/2 water 1/2 vinegar solution for a couple of hours if they are stuck

Reinstallation:

1. Insert service valve so that the rectangular shape end (1) sits in the slot (2) inside the rough
2. Press down to hold it in place while screwing the hex nut back on.
3. Turn water supply on and check for leaks.

They are called 1/4 turn. You can rotate the slotted screw nonstop. When the slot is horizontal, service valve is opened and vertical, it's closed.

Opened

Closed

Used in:

• Pressure balanced valves
  • 2014-2017
• Thermostatic and pressure balanced coaxial valves (1/2")
  • 2014-2017
• Wall mount tub faucet (xx21)
  • 2014-2017

Removal: 

1. Water supply to valve must be turned off. (see Preparation) 
2. Block drain or wall hole to prevent losing parts.
3. Using pliers, press the 2 clip endings together and pull the clip out
4. Grip service valve stem with pliers and rotate slightly to remove from valve body

Cleaning:

• Soak in a 1/2 water 1/2 vinegar solution for a couple of hours if they are stuck

Reinstallation:

1. Insert new service valve in the valve body until fully seated beyond retaining ring groove.
2. Using pliers, press the 2 clip endings together and push the c-clip into the ring groove. Push the c-clip to make sure it's properly seated in the groove. The distance between the 2 clip endings should be equal, and they should lay flat, as per image above.
3. Turn water supply on and check for leaks.

They are called 1/4 turn. You can rotate the slotted screw nonstop. When the slot is horizontal, service valve is opened and vertical, it's closed.

Opened

Closed

Used in:

• Pressure balanced valves

  • 2017 to present

• Thermostatic and pressure balanced coaxial valves (1/2")

  • 2017 to present

• Wall mount tub faucet (xx21)

  • 2017 to present

Removal: 

1. Water supply to valve must be turned off. (see Preparation) 

2. Block drain or wall hole to prevent losing parts.

3. With needle nose pliers, press the retaining clip together (green arrow) and dislodge the loop from the bottom slot of the hole (yellow arrow).

4. Grip service valve stem with pliers and rotate slightly to remove from valve body

Cleaning:

• Soak in a 1/2 water 1/2 vinegar solution for a couple of hours if they are stuck

Reinstallation:

1. Insert new service valve in the valve body until fully seated

2. Insert the retaining clip through the bottom slot first (yellow arrow), press the retaining clip together and secure them in the top slots (red arrow). (NOTE: the 2 prongs must be inside the top slots to be properly installed).

They are called 1/4 turn. You can rotate the slotted screw nonstop. When the slot is horizontal, service valve is opened and vertical, it's closed.

Opened

Closed

Used in:

• 3/4" Thermostatic and pressure balanced  coaxial valves

Removal: 

**Please note that Stop valve nut might be difficult to reach as it is installed at an angle on the valve body

1. Water supply to valve must be turned off. (see Preparation) 

2. Block drain or wall hole to prevent losing parts.

3. With channel lock pliers, grip the stop valve nut at the 2 flats and unscrew until it comes out.

Cleaning:

• Soak in a 1/2 water 1/2 vinegar solution for a couple of hours if they are stuck

Reinstallation:

1. With channel lock pliers, grip the stop valve nut at the 2 flats and screw until it's fully inserted as picture below
2. Turn water supply on and check for leaks.

To open: Using a flathead screwdriver, turn the center screw counterclockwise until it stops.

Opened

To close: Using a flathead screwdriver, turn the center screw clockwise until it sits flush to the nut.

Closed