Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-1004-02 PM-10 Impactor Kit, Replacement for Models 810-100 Price on request 401930-437 SCR-PHIL PAN 4-20 X7/16" Price on request 810-0901-01-R Basic Pump Only (No Dock) Price on request