Can I add a tub spout to the 2-Handle Pressure Balancing Valve?Updated 11 days ago
Yes — adding a tub spout to our 2-handle pressure balancing valve is supported and has been flow-tested and confirmed at our testing facility. Flow rate varies depending on whether you have the 2-way or 3-way diverter. Not sure which you have? See this article to identify your valve.
How it works
The valve has two outlet connections controlled by the diverter handle:
- Diverter pointing right (3 o'clock) → flow goes to the right-side port, which connects to the tub spout
- Diverter pointing up (12 o'clock) → flow goes to the top port, which connects to the shower head
Turn on the first handle to control volume and temperature, then use the diverter handle to switch between the tub spout and shower head.
Tub spout flow rate (no flow restrictor)
3-Way Diverter Valve
| Pressure | Flow Rate |
|---|---|
| 20 PSI | 10.5 L/Min (2.77 GPM) |
| 30 PSI | 13.0 L/Min (3.43 GPM) |
| 40 PSI | 15.2 L/Min (4.02 GPM) |
| 50 PSI | 16.8 L/Min (4.44 GPM) |
| 60 PSI | 18.5 L/Min (4.89 GPM) |
| 70 PSI | 20.0 L/Min (5.28 GPM) |
| 80 PSI | 21.5 L/Min (5.68 GPM) |
2-Way Diverter Valve
| Pressure | Flow Rate |
|---|---|
| 20 PSI | 9.62 L/Min (2.54 GPM) |
| 45 PSI | 15.0 L/Min (3.96 GPM) |
| 60 PSI | 17.7 L/Min (4.68 GPM) |
| 80 PSI | 20.0 L/Min (5.28 GPM) |
Installation requirements
The tub spout pipe must be at least 1/2" in diameter using copper or iron pipe. Because the tub spout port exits horizontally from the valve, the typical routing requires three 90° elbows: one dropping down off the valve, one turning toward center, and one final drop down to the tub spout nipple. Keep the overall run as short as possible — additional bends and length will reduce flow pressure.