Pressure gauge – inline type   Part #  732   This pressure gauge comes ready to attach to all systems with 1/4" tubing   It is helpful in monitoring the house water pressure operating pressure of the RO system determining when to replace the bottom three sediment filter and carbon filters.  It’s also helpful during installation and trouble shooting. Diameter of the gauge:  1.5” connector of the gauge: 1/8" MPT Range: 0 to 300 psi   It comes with 5 inch of 1/4" tubing, 1/8FPT x 1/4" compression elbow fitting 1/4" quick connect union tee fitting. Best place to connect the pressure gauge: It's best to connect the pressure gauge at the input side of the 4th stage RO membrane filter.   Optional attachment:  It can be attached to a garden hose adapter (part no. 745) or a faucet adapter (part no. 741) for easy checking of house water pressure.