Standard build was a 13L plastic jerry can under the kitchen sink and another under the bathroom basin.
Vans did not have hot water unless ordered with it as a factory fit, although a few of us have done a retro fit.
Hot water would need a larger, 30/50L tank under one of the seats or an outside Aqua Roll type fill. This would replace the two seperate jerry cans and feed both bathroom and kitchen.
If you can see the jerry cans in the photos of your van then you do not have hot water.
If you are practical you can retro fit a system for about £700 using an electric only Truma or Propex heater, new taps and extra pipework.
Colin