One of my customers had recently had a loft conversion and was complaining of poor flow rates from the shower in the new loft bathroom. We decided to go with this Worcester Bosch highflow boiler which is capable of producing 20 litres per minute of hot water. We also upgraded the size of the supply pipes to 22mm from 15mm. Once everything was fitted the customer was able to run 2 showers at the same time with no noticeable drop off in flow from either of the showers. Read more about our available boiler repair and installation services.