who makes ariston water heaters?

Hi Grandad, I did some searching around and found that they are owned by the MTS Group. The website below has a drop down bar on the middle right side of the screen, click that and choose your area. The next screen will have the products they carry, click the one you need. It will take you to a screen that has a row of black bars, choose the last one on the right. It says "Where to find our products" it will take you to a screen that has all the companies that either sell that product or sell and repair that product. Just choose one that looks familiar or that's close to you. Hope this helps, good luck.