Geotech Bladder Pump Bladders — 1.66"

Replacement bladders for the 1.66" Geotech Portable Bladder Pump. The bladder is the only part of the pump that contacts the sample, and it is a consumable — most programs fit a fresh one at each well to eliminate any possibility of carryover. PTFE or polyethylene? PTFE is chemically inert and the choice when the analyte list is sensitive or the method specifies it. It costs more per bladder but stands up to aggressive chemistry. Polyethylene is inexpensive enough to treat as genuinely single-use. For routine monitoring across many wells, the 12-packs are the economical way to buy. Running a PFAS-free pump? Fit the polyethylene bladders only. PTFE is a fluoropolymer and is not part of the PFAS-free build — see the PFAS-free parts list for the other components that differ. Match the bladder length to your pump body — an 18" pump takes 18" bladders, a 36" pump takes 36". Everything compatible with this diameter is in the 1.66" Bladder Pump System collection.