Geotech Portable Bladder Pump — 0.85"

The 0.85" Geotech Portable Bladder Pump is the narrow-diameter option for 1" monitoring wells and tight casings where a 1.66" pump will not fit. Stainless steel body with a quick-change bladder. A bladder pump keeps drive air completely separate from the sample — compressed air squeezes a flexible bladder, and only the bladder contacts the water. That isolation is why bladder pumps are the reference method for low-flow (micro-purge) sampling: volatiles are not stripped and turbidity stays low. Choosing your configuration Standard or drop tube. A drop tube intake draws from below the pump, so you can sample near the base of the screen without repositioning the pump body. Standard or PFAS-free. PFAS-free units use documented fluoropolymer-free wetted materials for programs where PFAS is an analyte. Same price as standard. Building a complete 0.85" system A working setup needs four things beyond the pump: GeoControl Pro controller — drives the pump and sets the cycle timing 0.85" bladders — PTFE or polyethylene; replaced between wells 0.675" & 0.85" bonded tubing — air and discharge in one bonded run GeoReel — the hand reel covers both 0.675" and 0.85" pumps Everything compatible with this diameter is gathered in the 0.85" Bladder Pump System collection. Specifications | Installation & Operation Manual