Zucchetti R99760 Non-Return Check Valve - COLD Side

Summary

Zucchetti R99760 Non-Return Check Valve Cold Side

The Zucchetti R99760 is a non-return check valve designed for installation on the cold water side of compatible Zucchetti mixer and shower valve assemblies. It fits within the supply path to allow cold water to flow in one direction only, preventing backflow and cross-connection within the valve body.

Function

This check valve closes automatically against reverse pressure, stopping mixed or hot water from pushing back into the cold supply. When the valve begins to fail, symptoms can include temperature instability, warm water appearing on the cold side, or uneven operation during use. In some cases, poor sealing can contribute to water movement after shut-off elsewhere in the system.

Confirmed Compatibility

The R99760 is specified for Zucchetti valves that list this part code as the cold side non-return valve in their technical or spares documentation. It should only be installed where the original check valve matches this code, as dimensions and sealing methods vary across Zucchetti ranges.

Installation Notes

Before fitting, isolate the water supply and access the check valve housing according to the valve?s service instructions. Ensure the replacement valve is installed in the correct orientation so that flow direction is maintained. Once fitted, restore the supply and check for stable temperature behaviour and correct operation.

When Replacement Is Recommended

Replacement is recommended if cold water flow becomes inconsistent, if temperature control is affected by crossflow, or if backfeeding is suspected within the valve. Installing a new R99760 check valve restores correct cold-side isolation and helps maintain reliable mixer performance without replacing the complete valve.

• Total Height: 49.1mm - - - Fitting Thread Diameter: 23.8mm - - Top O-Ring Diameter: 26.4mm