The 5/2 way valve is rated at 8 bar operating press, and 10bar max press...I had gone up to 11bar and it leaked, but then I disassembled it and applied sealant to the gaskets, tried it again and didn't leak.
But the fittings have no rating on them...the push fittings for sure will not take more than 11bar because I've already had one burst. The rest of the fittings are 1/2 metal, they look strong enough... I could pressurise the system until something goes bust, record the pressure and set the pressure at say 20% less...( I'll stay at a safe distance )