Truma Hot Outlet and Cold Inlet fits:

 TRUMA COMBI, ULTRASTORE,  ALDE WATER HEATERS 3010

ITEM: 34020-64000 + 34020-16200 

These have a 10MM John Guest push fit to fit the metal connection coming out your water heater with the smooth end

Not suitable for use on the boilers with a Humped stem 

****See pictures***

The other end takes 12mm outside diameter push fit water hose

Genuine Truma Alde  parts