With this set, a Quooker COMBI system (installed after 2013) can be converted to a COMBI+ system.
You screw the nipple with the plus into the hole of your mixing valve.
This allows you to connect your Quooker reservoir to hot water so that it is filled with hot water and you end up with infinitely hot water.
This Quooker connection set also includes a white check valve which prevents the hot water from your boiler from flowing back into the hot water pipe due to the pressure.
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