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- Lighting 101
- Lighting Glossary
- Light Bulb Types
- Lamp Photometrics and Software
- Ceiling Fans FAQ
- Recessed Lighting Tips
- Landscape Lighting Tips
- Lighting For Older Adults
- Plumbing Glossary
- Toilet Buying Tips
- Custom Shower Guide
- Steam Shower Guide
Custom Shower Guide
Water pressure is a critical factor in a custom shower. GROHE recommends at least 50 psi and a 3/4” water supply for a system with 3 or more outlets.
A large custom shower with 3 or more heads will require more hot water.
A pressure balance valve is not a high flow valve, and cannot be expected to supply adequate water volume especially in a multiple shower outlet installation.
A single handle thermostatic temperature control valve, or a two handle thermostatic valve with integral volume control is the recommended control vale. 1/2” for showers with no more than 2 heads and 3/4” for showers with 3-6 heads. If the number of shower outlets desired is more than one valve can accommodate, it will be necessary to use two (or more) thermostat valves. It is not necessary to have a 3/4" supply line to use a 3/4" valve. A 1/2" supply line plumbed into a 3/4" valve will still effectively increase water flow, but a 3/4" supply line is preferred.
A volume control is a valve that turns the water on and off. Starting at the "off" position, you can steadily increase water flow through to the "full on" position. Volume controls do not control temperature. Custom showers are generally designed with separate on/off (volume) controls for each outlet. Usually one volume control for the shower head, one for the hand shower, and one for three body sprays. If the combined flow rates of the outlets exceed the volume control flow rate, there will be a reduction in performance.
Fixed position, usually above shoulder level (on wall or ceiling). Water direction may be adjustable depending on fixture. Typically has 2 or more adjustable spray styles.
Movable has hose connection. Can be mounted to shower wall with bracket or sliding bar. Usually has 2 or more adjustable spray styles.
Fixed position, usually at and/or below shoulder level. Usually In groups of 2 or more. Water direction may be adjustable depending on product.