Thermostatic Shower Valves

Master Bathroom Shower Design At It’s Best

Isenberg’s thermostatic valves are ideal for master bathroom remodels and new construction builds. They offer a high flow rate (13 Gallons Per Minute) for multi-output large showers and also for quickly filling up a large tub. Quick Valve Features:

– 3/4″ NPT Connections – Female
– Various versions available – 1,2 & 3 output
– Separate diverters and volume control
– Solid Brass casting

thermostatic mixing valve

Isenberg TVH™ Series Thermostatic Control Valves

thermostatic shower with rain shower head

Single Output Shower Design Guide

The single control shower is the most simple. In most cases, the shower control valve is connected to a showerhead. This type of arrangement is found in various secondary bathrooms and has a lower cost. This setup is ideal for small shower enclosures

1  – The shower control valve should be about waist high ~ 36″ from the floor of the shower.

2 – The showerhead should be within the reach of both the tallest and shortest user. Keep the shower head within 12 Inches of the tallest user.

3 – Consider the shower arm projection from the wall carefully. Shower arms come in sizes from 6″ to 20″. Based on the person using the shower, having too small of a shower arm may prevent them from having a proper bathing experience.

4 – Make sure the shower head has at least 20 degrees of swivel in it – this can provide some play to accommodate persons of different sizes and heights whilst using the shower.

Choose a smaller multi function shower head

– for higer water pressure
great for rinsing hair quickly

thermostatic shower with rain shower head and slide bar with hand shower

Dual Output Shower Design Guide

A dual output shower is the most common specified shower and has 2 water output apparatus’ such as a shower head and handheld spray. This type of arrangement is found is various master and secondary bathrooms and is a mid-price point option. You can use it in a small to mid-sized shower.

5 – The wall supply elbow (union) should be placed in the appropriate space to consider usability and aesthetics. We recommend the elbow to be placed below the shower valve.

6 – The slide bar is usually placed on the right side of the shower valve (although this is not necessary) within 12-16 inches from the valve. This allows the user to control the shower valve and use the hand shower from the same spot within the shower.

7 – Consider the right height placement of the slide bar so that the hand held water spray can reach from waist to shoulder for all users of the shower.

Choose the appropriate sized hand shower

– cosmetic look based on your liking
– larger sized hand-helds offer lesser water force

Use a Slide Bar With Integrated Elbow

– for a cleaner look with less wall clutter
– the ability to adjust the hand shower to different heights

thermostatic shower with rain shower head and body jets

Three Output Shower Design Guide

A three-output shower provides a finer showering experience. It consists of 3 water output apparatus’. It usually has a wall mount or ceiling mount shower head, a handheld shower and a few body jets although various other combinations are also possible. Placement of these items on the shower wall is important so that each apparatus delivers water to the user as intended. This type of shower design is best used in a larger shower enclosure.

8 – Placement of body jets is very important. Body jets are usually placed vertically, and they should supply water between the knees up till the shoulder – it is important to have this conversation with the shower user before the body jets are plumbed into the shower and their installation location finalized.

CAUTION – Body jet water lines should be plumbed in a loop – this is very important to ensure that a uniform amount of water exits each body jet for an optimal showering experience.

9 – The distance between the shower wall and the placement of the ceiling mount rain head is important and should not be too far away from the wall nor too near – a general rule is between 14-18 inches from the wall.

10 – The distance of the rain head from the ceiling is also important. The rain head should be about 12 inches above the head of the user – if the rain head is installed too high, the water will lose heat while it falls, which diminishes the showering experience.

Most thermostatic valves offer a higher flow rate than regular pressure balance valves. To accomplish this, they usually have ¾” female NPT connections. This allows the plumber to bring right to the valve, a ¾” water supply line.

Temperature Regulation & Anti Scald

Isenberg thermostatic valves regulate temperature via the temperature knob. The way to identify the temperature knob is by noticing the push button on the knob.

This push button is an anti-scald mechanism.It allows the temperature handle to turn anti-clockwise to increase the water temperature but only by a certain amount. If a higher temperature of water is desired the push button must be pressed and only then with the handle turn further in the anti-clockwise direction.

This feature is especially useful when kids are using the shower because it prevents them from turning the water to a very hot temperature too quickly.

If you are an interior designer designing a master bathroom shower – the Isenberg valve selection guide is a must-read. It reviews in detail all different kinds of thermostatic valves.

Constant Water Temperature

Another great feature of the thermostatic valve is that once the temperature knob is set – it will output water at a fixed temperature (within a range of usually 2° Celsius).

Just turn the volume control know on and off and leave the temperature knob as is. And you will have the same temperature every time (within 2° Celsius).

Control Water Volume – Full Force Down To A Trickle

All Isenberg thermostatic valves control the volume of water via a separate volume control knob. The water volume can be controlled specifically from full flow down (13PGM in our case) down to Zero GPM.

This way the user can have a flow and volume of water as per their wish. Maybe have full flow when you are rinsing your hair to get the shampoo out and a slower flow otherwise.

Servicing Your Shower Valve

Servicing thermostatic valves is important and quite easy. The thermostatic valve has within it a thermostatic cartridge which has a wax element. The wax comes in contact with hot and cold water and expands and contracts.

This expansion and contraction regulates the temperature of water by allowing only a certain amount of hot and cold water through the cartridge. The cartridge also has rubber o-rings which provide watertight seals. Those should always be checked for damage.

Removing The Temperature Cartridge

Removing The Diverter Cartridge

Checking The Thermostatic Shower Cartridge

Once your cartridges have been removed it is important to visually inspect them for defects.

– Check for dirt
Clean filters
– Inspect o-rings
– Inspect rubber seals

If any of these parts especially o-rings and rubber seals are damaged they need to be replaced.