Valves

The safest, most reliable method of water delivery is automated.

Bottles Vs Valves

An Edstrom Automated Watering System is the safest, most reliable method for providing high-quality drinking water to all your research animals. Each product is specifically designed and rigorously tested to ensure animal safety. The foundation of every Edstrom watering system is absolute dependability. Edstrom is a leader in the industry with drinking valve innovations that ensure animals and cages stay dry.  Our proven shielded drinking valve is used to water millions of mice and rats in ventilated cages. These valves have an exceptional record of reliability and are easy for animals to use.

The unique, patented design of the Edstrom drinking valve utilizes precision-manufactured parts including a guard to protect the stem from accidental movements, a shield to help prevent bedding from entering the valve, and an O-ring and diaphragm to provide the sealing force to deliver water on demand.  Every Edstrom drinking valve is manufactured and tested under strict quality control at our facility in Waterford, Wisconsin.   

Highest Quality Materials.   We use only the highest quality materials, such as 316 stainless steel and silicone that withstand the rigors of sanitization and water treatment.  Our valves are precisely manufactured, calibrated, and individually tested.

Drinking Valves to Suit Your Species

Avidity Edstrom Valves

Edstrom has drinking devices for almost every animal in the vivarium.  Whether you have mice, rats, dogs, guinea pigs, primates, hogs, birds, cats, rabbits, etc.,  we have drinking valves to suit the species.  Animals simply bite, lick, or nose the stem of the valve and water flows out at a controlled rate appropriate for the species.  When the animals release the stem, water flow immediately stops.

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  1. A140 DV SS  Standard Tip Rodents A140 DV SS  Standard Tip Rodent Watering Systems
    A140 DV SS Standard Tip for Rodents 1000-1400-ROD
    $9.63
  2. A160 DV Shielded Tip 3/8-32 A160 DV Shielded Tip 3/8-32 Thd
    A160 DV Shielded Tip 3/8-32 Thd 1000-1641
    $28.97
  3. A160 DV Shielded Tip, 3/8-32 Thread with Recessed Stem A160 DV Shielded Tip, 3/8-32 Thread with Recessed Stem
  4. A160 DV Shielded Tip Long/QD2 Cap A160 DV Shielded Tip Long/QD2 Cap
    A160 DV Shielded Tip Long/QD2 Cap 1000-1661
    $37.93
  5. A160 DV Shielded Tip Long/QD2 Cap Rat
    A160 DV Shielded Tip Long/QD2 Cap Rat 1000-1661-350
    $37.93
  6. A160 DV Shielded Tip/QD2 Cap
    A160 DV Shielded Tip/QD2 Cap 1000-1665
    $34.64
  7. A160 DV Shielded Tip/QD2 Cap Rat
    A160 DV Shielded Tip/QD2 Cap Rat 1000-1665-350
    $34.64
  8. A160 DV Shielded Tip-EC5 Cap
    A160 DV Shielded Tip-EC5 Cap 1000-1684
    $35.17
  9. A160 DV Shielded Tip/EC5 Cap A160 DV Shielded Tip/EC5 Cap
    A160 DV Shielded Tip/EC5 Cap 1000-1688
    $35.17
  10. A160 DV Shielded Tip/EC5 Cap Rat A160 DV Shielded Tip/EC5 Cap Rat
    A160 DV Shielded Tip/EC5 Cap Rat 1000-1688-350
    $35.17
  11. A160 DV Shielded Tip EC5 Cap A160 DV Shielded Tip EC5 Cap
    A160 DV Shielded Tip EC5 Cap 1000-1689
    $35.17
  12. A160 DV Shielded Tip EC5 Cap Rat A160 DV Shielded Tip EC5 Cap Rat
    A160 DV Shielded Tip EC5 Cap Rat 1000-1689-350
    $35.17
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Exploded view of the Edstrom Vari-Flo Drinking Valve
Exploded view of the Edstrom Vari-Flo Drinking Valve

The pivoting stem design used in all Edstrom valves is easy to understand when you look at the cross sectional drawings of the valve below.

Cross section view in closed and open position


In the normal, closed position, the head of the stem is held securely against the O-ring by the elastic diaphragm, preventing water from flowing under the stem head and out the valve.
When the end of the stem is moved in any direction by biting, licking or pecking, the head of the stem pivots on the O-ring. One side of the head lifts off the O-ring and allows water to flow under it and out to the animal's mouth or beak.
When the animal releases the end of the stem, the elasticity of the silicone rubber diaphragm located behind the stem head pushes the head back to the closed position, stopping the flow of water.
The many advantages and benefits of this simple valve design.

  • Because a soft O-ring provides the water shut-off seal, the valves are extremely resistant to leaks. Dissolved minerals in the water (hard water and iron) do not cause the valve to leak as with other types of waterers. However, we do recommend that particles in the water be removed by filtration.
  • The Edstrom valve can be easily disassembled for cleaning or replacement of parts.
  • The Edstrom valve is not sensitive to water supply pressure. It will operate with pressures as low as 1/8 psi and as high as 10 psi. At higher pressures the force required to actuate the valve increases. An operating pressure of 3-5 psi is recommended for easy operation by most species.
  • The pivoting head of the valve is held tightly closed by the elasticity of the silicone diaphragm, preventing possible backflow of water and contamination into the water supply line to the rest of your facility.
  • A small droplet of water normally remains at the end of the valve after its operation. Animals and birds quickly locate this water, and in their efforts to drink it, move the stem, releasing more water to drink. They train themselves to drink from the Edstrom Valve in no time at all.

Local plumbing codes may require that you install an Auto-Air Break Valve at the point you connect your automated watering system to your domestic water supply. Use an approved device for this purpose.