What to do if fill valve knob turns but does not operate valve on Aqua Lung Security Sensors?
- MMaria EdwardsSep 9, 2025
Replace the valve knob or rebuild the valve.
What to do if fill valve knob turns but does not operate valve on Aqua Lung Security Sensors?
Replace the valve knob or rebuild the valve.
Why is my Aqua Lung Security Sensors regulator leaking?
First, make sure the leak is actually coming from the regulator and not a fitting. If it is a fitting, see 'Leak at Fittings'. If it is the regulator, rebuild or replace it.
How to fix a leak at the fitting of Aqua Lung MRS III Security Sensors?
Inspect the fitting for damage, and replace it if damaged. If the fitting is loose and it's a pipe thread fitting, remove it, replace the Teflon tape, and reinstall it in the same orientation. Compression and flare fittings can be tightened without removing them. If these steps don't resolve the leak, replace the fitting.
What to do if Aqua Lung MRS III have leaks at hose?
Check the hose fittings to ensure they are tight. If the leak isn't at a fitting, then replace the hose.
Why is the gauge reading incorrect on my Aqua Lung MRS III Security Sensors?
Have a calibration technician verify the accuracy of the gauge. If it's inaccurate, replace the gauge.
What to do if Aqua Lung Security Sensors MRS III exceeds 15 years from manufacture date?
Contact Breathing Air Systems to see if the supply cylinders life has been extended beyond 15 years. If not, replace the supply cylinders.
What to do if Aqua Lung Security Sensors MRS III case is damaged?
Replace the case.
What to do if Aqua Lung Security Sensors MRS III metal frame is damaged?
If the damage is minor, the metal can be straightened using standard shop practices and hand tools. If the damage is major, replace the MRS-III.
How to fix leaks at inline bleeder on Aqua Lung Security Sensors?
Tighten the valve knob by hand. If the valve is already tight, replace the valve seat or the entire inline bleeder.
How do I fix leaks at the fill connector swivel on Aqua Lung MRS III?
Rebuild the fill connector swivel joint or replace the fill connector.
Provides instructions for operating the MRS-III Mobile Refill System.
Lists important safety precautions for using the MRS-III system.
Summarizes critical warnings, cautions, and notes for safe operation and handling.
Details the purpose and capabilities of the MRS III Mobile Refill System.
Identifies the components and layout of the complete MRS III unit.
Steps to prepare the unit for operation, including unpacking and checking.
Step-by-step guide for operating the MRS III system.
Lists critical safety warnings regarding high pressure and misuse of the unit.
Procedure for annual maintenance of the MRS III unit.
Criteria for inspecting cylinders for damage and serviceability.
Procedure for verifying and calibrating system pressure gauges.
Procedures for 5-year service, including cylinder hydrostatic testing.
Steps to rebuild the fill valve (YVA3010A).
Steps to rebuild the supply cylinder valve (VAL1).
Procedure for removing and rebuilding the preset regulator (1120).
Information regarding the Pelican case, including warranty.
Lists common problems and recommended actions for troubleshooting the MRS III.
Identifies parts of the MRS III unit as viewed from the front.
Identifies parts of the MRS III unit as viewed from the side.
Identifies parts of the MRS III unit as viewed from the end.
Lists parts included in the 1-year and 5-year maintenance kits.
Procedure for overhauling the check valve.
Procedure for overhauling the PRS6 fitting.
Procedure for overhauling the preset regulator.
Parts breakdown for the Fill Valve (YVA3010A).
Parts breakdown for the Supply Cylinder Valve (VAL1).
Parts list for the Supply Cylinder Valve Overhaul Kit (VAL1KIT).
Procedure related to the safety disc for the supply cylinder valve.
Description and parts for the Sea Fill Adapter (PRS-21).
Parts breakdown for the Sea Fill Adapter Overhaul Kit.
Lists and describes components shown in the MRS III flow diagram.
Technical drawing with internal dimensions for the Pelican case top.
Specifies the empty and full weight of the MRS III unit.
Technical drawing with internal dimensions for the Pelican case bottom.
| Brand | Aqua Lung |
|---|---|
| Model | MRS III |
| Category | Security Sensors |
| Language | English |