Hi there, I've read many posts and found a lot of help from the forums but I have a problem and I'm not sure how to overcome it... First of all I would like to highlight that I am very aware of the difference between pressure and flow rates. It's part of my job, but I'm not in the plumbing trade. Okay, I'm remodeling my house and intend to create a new walk in shower. This will be the only shower in the property The building of the dedicated walk in shower is going to come with a high price tag and I need the shower to have a high flow rate ... Something in the region of 20 litres per minute. My cold water supply runs at 12 lpm and the hot water supply through the taps and current shower runs at 8 lpm. Cold water = 12 litres per minute discharge rate Hot water = 8 litres per minute discharge rate Cold water supply pressure is approximately 3 Bar. At present there is a three year old combi boiler providing hot water. With the mains cold water supply of 12 lpm a boiler change will result in a flow rate that will match, but not exceed 12 lpm for obvious reasons. What method or system of heat generation, storage tank and pump will be required to achieve the flow rate I desire? I am happy to leave the current combination boiler in situ to provide hot water and heating for the house and prepared to install a separate dedicated hot water supply purely for the shower. The cost of a dedicated hot water supply is not the primary concern. If I can't achieve a flow rate greater than the current cold water flow rate (12 litres per minute) then the building of the new shower cubicle will be pointless and I'll have to go back to the drawing board. Any help, recommendations or advice will be greatly appreciated.