
Waterra Surge Blocks for Monitoring Well Development
Thermoplastic | Fits 2" & 4" monitoring wells | OD 1.88" (2" well) / 3.88" (4" well) | ~1/16" annular gap | Press-fit on D-25 or D-32 Foot Valve
Small parts for well sampling: nylon and HDPE barbed and reducing connectors, Proactive low-flow check valves, a Waterra valve wrench for foot valves and a tubing cutter, a bailer retriever and nylon bailer rope, and the 3/8 in. Solinst Model 408M micro pump.

Thermoplastic | Fits 2" & 4" monitoring wells | OD 1.88" (2" well) / 3.88" (4" well) | ~1/16" annular gap | Press-fit on D-25 or D-32 Foot Valve

316 SS or Acetal (Delrin) | 10–32 mm OD | Micro/Low/Standard/High Flow | Up to 4 gpm (15 L/min) | Lift up to 300 ft (90 m)

Nylon 6 (natural) or Black HDPE | Sizes: 1/8\" to 1-1/2\" I.D. | Straight barb-to-barb hose mender | Nylon temp: -40°C to 100°C | HDPE temp: -55°C to 90°C

Nylon 6 (natural) & Black HDPE | Sizes 1/8\" to 5/8\" I.D. | 10/pack | HDPE temp: -55°C to 90°C | Nylon temp: -40°C to 100°C

For All Foot Valves Except WA-SS-06, WA-SS-09 & WA-SS-19

3/8\" (10 mm) OD x 6\" pump body | PTFE coaxial tubing | 316 SS sintered 50 micron filter | Flow: 20–150 ml/min | Tubing lengths: 90/140/240 ft

Disposable PVC | Low flow (Fractional Flow™) groundwater sampling | Top-fitting for Proactive plastic pumps | Prevents back-flow on pump shutoff

Stainless Steel | 5.5" Length | 4 Hooks | Min. Well Diameter: 2"

Nylon Braided | #18 Size | 550 ft (167.64 m) | 110 LBS (49.90 KG) Resistance | White | Cardboard Reel

Weight: 0.35 lbs | Dimensions: 11 × 4 × 1 in | Teflon-coated blade | Compatible: HDPE & LDPE Waterra tubing | Action: rotating/rocking motion
The small parts that keep a groundwater sampling setup running. Connectors: Cords Canada barbed connectors (1/8 to 1-1/2 in. ID) and reducing connectors in nylon 6 or black HDPE, rated -40 to 100 °C (nylon) or -55 to 90 °C (HDPE). Pumps and valves: the Proactive low-flow check valve and non-return check valve, which stop water flowing back when the pump is shut off, and the Waterra valve wrench for foot valves. Wells: a stainless bailer retriever for wells 2 in. and larger, and 550 ft of braided nylon bailer rope. Tubing: the Waterra tubing cutter for HDPE and LDPE tubing. Also: the Solinst Model 408M micro pump for narrow wells.
It stops water flowing back down the line when the technician shuts the pump off, which matters for low-flow sampling. Proactive's top-fitting check valves fit its standard and high-performance plastic pumps.
The Solinst Model 408M Micro Double Valve Pump: a 6 in. long, 3/8 in. (10 mm) body with PTFE coaxial tubing and a 50 micron stainless filter, for CMT multilevel systems, direct-push and drive-point wells, at 20 to 150 ml/min.
With the bailer retriever: 5.5 in. of stainless steel with four hooks, for wells 2 in. in diameter and larger.