Jobe Topaz 1" Detach Short Tail Float Valve – High-Flow Trough Valve with Detach Base
The Jobe Topaz 1" Detach Short Tail is a high-flow water trough float valve for larger livestock troughs, stock tanks and water tanks. Its 1" inlet flows more water than the 3/4" Topaz at the same pressure, and it sits on Jobe's Detach base.
Like every Topaz, it uses a pilot-operated diaphragm that opens for high flow and closes gradually to help reduce water hammer. The short tail keeps the connection compact. Set the water level by hand with no tools, and lock it off whenever you need to.
The Detach base also fits Jobe's Detach Outlet Extension (sold separately), which lengthens the outlet by 2" and directs flow into a narrow, less turbulent stream. Built from corrosion-resistant materials, with a built-in port for the FrostPro anti-freeze device (sold separately).
Features
Detach Base
Compatible with Jobe's Detach Outlet Extension (sold separately).
High-Flow Pilot-Operated Design
The float operates a small pilot valve, which operates the main diaphragm valve for fast refills.
Gradual Shut-Off
Closes slowly to help reduce water hammer in your lines.
Flexible Mounting
Installs top, side or bottom entry, horizontally or vertically — above or below the water line.
Tool-Free Adjustment & Lock Switch
Set the water level by hand, and lock the valve in the off position when you need to.
Specifications
Connection: 1" short tail with Detach base (7/8" thread length)
Operating Pressure: 5–100 psi (0.3–7 bar)
Max Temperature: 140°F (60°C)
Water Level Differential: 3/4"–2-1/2" (20–60mm), increases with inlet pressure
Mounting: Top, side or bottom entry
Float: 125mm HDPE (standard)
Materials: Glass-filled nylon body, 304 stainless steel hardware
Frequently Asked Questions
Should I choose 1" or 3/4"?
The 1" inlet flows more water than the 3/4" at the same pressure, making it a better fit for large troughs and high-demand watering points.
Will it work on a gravity-fed system?
The Topaz operates from 5 psi (0.3 bar) up to 100 psi (7 bar), covering many gravity-fed and pressurized systems.
How do I prevent back-siphoning?
Jobe recommends mounting the valve at least two inlet diameters above the trough's overflow. Some mounting positions may not comply with local regulations, so check yours.
Need a different size or tail?
See every option on the Jobe Topaz Float Valve page — 3/4", 1" and 1-1/4" inlets in long and short tail.
High flow, compact fit — the Jobe Topaz 1" Detach Short Tail keeps big troughs full.