what is a indirect pumped cylinder All aspects of plumbing questions and answers, help, tips and information

[peter8899]

i have been told i need a indirect pumped cylinder for the hot water.but on looking for one i can not find any refrence to pumped or non pumped cylinders, just direct and indirect.so can someone explain whether all indirect cylinders are by default pumped or what??

[plumbbob]

The difference between fully pumped and gravity tanks is the internal heating coils are different diameters. Gravity coils were 28mm (1") now I think all tanks are 22mm which is ideal for fully pumped although 28mm can be used - you just need different couplings.