Compatible: The air flow switch is fit for Pentair Mastertemp used in model number: 200, 300, 400. Fit for Pentair Mastertemp low nox used in model number: 125. Replaced number part: 42001-0061s. 42001-0059s. Dorman TB74659PR Rear Suspension Track Bar for Specific Lexus / Toyota Models Fits select: 2003-2021 TOYOTA 4RUNNER, 2007-2014 TOYOTA FJ CRUISER. USD$78.18 Replace the AFS by removing the screws from the AFS. Unplug the wires on the AFS. COMPATIBILITY]Compatible with pentair mastertemp 400, 300, 200 and pentair mastertemp 125 low nox pool heater parts. It will also work all sta rite... Water Pressure Tester Pentair MasterTemp 400 NG Air Flow Switch - Trouble Free Pool Pentair Mastertemp 400 Control Board Also compatible with all Sta Rite heaters. Pentair Heater Air Flow Switch 42001-0061S - Online Swimming Pool Please Rest Assured: Each product has been tested and inspected many times before leaving the factory, if you have any questions about the product, please contact us, we will reply you immediately. This high-quality and durable airflow switch kit includes: airflow switch*1, constant tension hose clamp*2, hose*2, screws*2 Easy to install, non-destructive replacement, easy to install, saving labor and time. High-Quality Materials: The electrical system airflow switch is made of high-grade materials.