Solinst 408 Double Valve Pump Configuration:Oetiker Clamp Set (1/4" Double Ear, set of 10) 4 mg/L NH4

4 mg/L NH4

**Please Note: For any well that is 4" or larger

SO₂ and additional alarm ranges)

Stainless-steel models are rated to 500 ft (150 m) below grade

Solinst 408 Double Valve Pump Configuration:Oetiker Clamp Set (1/4" Double Ear, set of 10) 4 mg/L NH4The Solinst 408 Double Valve Pump is a pneumatically driven, positive displacement pump with a check valve at its base and another at its top, connected to the surface by separate drive and sample lines. During the drive phase, compressed gas sent down the drive line pushes the static water column downward, closing the bottom check valve and forcing water already in the pump chamber up through the top check valve to the sample line. Venting the drive