PureSec Water Pressure Gauge Oil Filled Vibration Proof Stainless-Steel 2-1/2" Dial Size Dual-Scale with 1/4" NPT Bottom Mount and 1/4" RO Fittings for RO System (0-0.7kg(MPa)/0-100psi) | Quiet, Durable, Accurate

• High Quality Materials: Our pressure gauge is Made of 304 stainless steel with Solid Construction for indoor and outdoor use; Our RO fittings are made from safe,non-toxic materials.They are Safety used in Reverse Osmosis System；The larger 2 1/2” size is nicer too for easier viewing.
• Specification&Compatiable with: 2.5" Dial with 1/4" Male NPT lower Mount Connection,about 0.4lb;Measurement Range:0-0.7Mpa/1Mpa/1.6Mpa;Accuracy Rate:Accuracy: +/-3-2-3%;Woking Temperature:-25° to +50°; Comes with 1/4" push to connect fittings.Works for Standard 1/4 OD RO Tubings for Water filtration System
• Multi-Function: This water pressure test kit is mainly used for measuring water filter pump/holding tank pressure of whole-house reverse osmosis water filtration system.But this pressure gauge itself can be also used for compressed air system/hydraulic system/ outdoor irrigation pump in irrigation system/pool pump and filter etc,even beer pressure fermentation.
• Notes:1,The air bubble at the top of the gauge face is normal by design,the gauge is faulty if without bubble;2,No need to cut the rubber plug on the top of the meter as that will open the meter to possible infiltration of particulate contaminants and moisture, as well as allow the glycerin to leak out;

• Prepare for installation — Ensure system is depressurized. Attach the 1/4" NPT fitting to the gauge, then connect inline before the RO membrane or pump for accurate pressure reading.
• Check connections — Tighten fittings securely to prevent leaks. Verify the gauge face is visible and the needle is at zero before system start.
• Monitor pressure — Read the gauge during system operation. Maintain pressure within recommended range (0.7-1.6kg/MPa) for optimal RO performance.

Typical situations where PureSec Water Pressure Gauge Oil Filled Vibration Proof Stainless-Steel 2-1/2" Dial Size Dual-Scale with 1/4" NPT Bottom Mount and 1/4" RO Fittings for RO System (0-1.6kg(MPa)/0-220psi) | Oil Filled helps — illustrative scenarios, not customer reviews.