Grohe Membrane Inlet Valve - 4375800M

This valve is compatible with Grohe Adagio 6L Cistern (37762 SH0, 37945 SH0), dual flush cistern (38690 000), Eau2 cistern (38691 000), and Rapid SL WC 6-9l Cistern (38525), as well as other Grohe WC concealed cisterns operating above 1.0 bar.

This valve is designed for high-pressure systems and operates effectively with water pressure above 1.0 bar.

The valve features a scratch-resistant, easy-to-clean finish. Simply wipe the exterior with a damp cloth. Avoid using abrasive cleaning products.

The Grohe Membrane Inlet Valve comes with a 5-year manufacturer's warranty.

No, this valve is specifically designed and recommended for use with compatible Grohe toilet cistern models only.

First, check that the main water supply to the toilet is fully open. Ensure the valve is installed correctly and that there are no kinks in any flexible hoses. If the issue persists, verify your household water pressure meets the requirement of over 1.0 bar.

Check that the water supply is fully turned on. Ensure the valve is correctly installed and not obstructed. Verify that your water pressure is above 1.0 bar. If the issue persists, the valve may be faulty or clogged internally.

This is often a sign of a worn diaphragm within the inlet valve. While this specific valve does not typically allow for diaphragm replacement, ensure it is correctly seated. If the problem continues, the valve may need replacement.

Some noise is normal, but excessive noise could indicate high water pressure or a partially blocked valve. Ensure no debris is caught in the valve mechanism. If pressure is very high, consider a pressure-reducing valve for your system.