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A torque arrestor is used with submersible pumps—typically installed at the bottom of the well—to prevent motor start-up torque from thrusting the pump against the side of the well casing. Think of it as a shock absorber for your well system that helps protect the pump and other mechanical components, reduces wear, and can lower maintenance costs caused by equipment damage. Torque control devices are also used in other industries to protect gearboxes and rotating assemblies, and mechanical torque-limiting devices can disconnect or slip quickly to protect machinery. For well owners, installers, and contractors working with 4" to 8" wells.
Placement: The torque arrestor should be placed 1' or 2' above the pump. It works alongside the pressure tank, which maintains water pressure and helps limit pump cycle frequency. The well casing should extend at least 12 inches above soil to help protect the well system, and where the well is located also affects contamination protection. This helps reduce contamination risk and protect well water.
Installation: Place the torque arrestor around the drop pipe so that each half is spaced evenly.
Install the lower pipe clamp and tighten.
Install the upper pipe clamp (leave loose) and then push down on the torque arrestor to spread the center portion so it fits the inside of the casing, and it may also be used with plastic drop pipe where compatible, whether the pump is in a shallow setup or a deep installation where casing size and well depth determine how it should be positioned.
Just a snug fit, do not spread it so much that it is hard to get it in the casing. Then tighten the upper clamp. The upper clamp must be as tight as possible. This will make it easier to remove the pump at a later date and improve access for service. System layout may also depend on components such as a pitless adapter.
Pressure tanks store water and maintain air pressure, and typical well systems operate between 40 and 60 psi. A pressure gauge helps determine pressure issues and suction-side performance while assessing water quantity for household demand or pump cycling. Common tank options include conventional galvanized steel tanks, modern fiberglass tanks, and sealed diaphragm tank designs with a rubber bladder that separates air and water.
Manufacturer: Aqua Science
Model #: torque-arrestor
Universal Product Code: 777808061440
Shipping Weight: 1 lb
Fits 1" or 1-1/4" Drop Pipe
Compatible with 4" to 8" well casings
Supplied with 2 stainless steel clamps for secure installation
Includes AquaScience 8% Crosslink Resin
| Model # | torque-arrestor |
|---|---|
| Manufacturer | Aqua Science |
| Shipping Weight | 1 |
Ensure proper installation of the Torque Arrestor to protect your well system.

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