merry xmas bro,
yeah , but not much will only reduce by 10-12%. you see water to in and out Jaque C02 mixer . The oulet flowrate from 13mm to 25mm hose will be back full flowrate to your 422 tank but to inlet will reduce 10-12% due to compress of flowrate but the pressure of FX5's flowrate is still greater than 2 units 2028 eheim.
So i dont see this will be a problem even you option for a bigger inlet/outlet valves.
Actually, the smaller the hose the higher the pressure..the flowrate will reduce but smaller hose to the bigger hose, the flowrate will be in a full force.
Tried this moumentum before when were working in oil refineries.
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