Prevost ALTO 4 Compressed Air Filter / Water Separator — 3/4" & 1" FNPT

The Prevost ALTO 4 compressed air filter removes bulk water, condensate and pipe scale from your air line before it reaches tools, dryers or point-of-use equipment. ALTO 4 is the large-body size in the Prevost ALTO air-preparation range, covering 3/4" and 1" FNPT ports — the sizes above where the Prevost ATU series stops. A machined aluminum body and metal-guarded bowl handle real shop pressures, and the push-button drain lets you dump collected condensate without tools. The modular ALTO 4 body stacks with the matching ALTO 4 regulator and lubricator, so you can build a 3/4" or 1" filter-regulator-lubricator train from individual modules. Specifications Port sizes: 3/4" FNPT and 1" FNPT Flow rate: 177 CFM (3/4") / 230 CFM (1") at 87 psi, ΔP = 4 psi Body: Machined aluminum with metal bowl guard Drain: Manual push-button Replacement element: Prevost TF C45, 25 micron Series: Prevost ALTO 4 air treatment module Available Variants & SKUs SKU Port Size Flow Rate TF 204T 3/4" FNPT 177 CFM at 87 psi (ΔP = 4 psi) TF 205T 1" FNPT 230 CFM at 87 psi (ΔP = 4 psi) Flow ratings are taken from the Prevost 2026 US price list. Note that ALTO 4 is supplied as individual modules — Prevost does not catalog a pre-assembled 2-piece or 3-piece set in 3/4" or 1".