PEGASUS PressFit (M-Profile) Reducing Coupler C x C 22mm x 15mm. Suitable for drinking water, heating, rainwater, compressed air, fire extinguising systems and sanitary water. Easier to work during installation compared with other pipe systems. O-rings incorporate leak detection indicators. Seals made when green plastic cover (crimp indicator) peelas away from the fitting when crimped correctly. Flame-free installation. No torch, no gas, no flux, no system contaminants. 10 year guarantee. WRAS Approved. Hot and cold water apllications. Maximum working pressure of 16 bar. Maximum operating temperature of 110 degrees celcius (WRAS Approved up to 85 degrees celcius). EPDM O ring.