I hope this is the forum to ask, I have a Worcester Bosch Highflow electronic 400 combi boiler, the installer did a mains pressure test and flow rate test before installation and said all was fine. It is meant to have a flow rate of hot water of 18 litres a minute. Because of a thread on another forum about bath filling times, I decided to measure the flow rate. The temperature setting for the water is set to lowest (55C) on the boiler. I get 12.5 litres/min on the kitchen tap which is the same level as the boiler and I only get 6 litres per minute on the bath hot water tap which is 2 storeys higher (about a 9m rise).
When I turn the cold tap on at the same time as the hot water is on it just about doubles the flow so I assume the mains pressure is fine. The funny thing was when I had the boiler installed 2005 the first day when the installation was finished the hot water absoultley gushed out of the tap, much to my surprise as I was expecting there to be a difference moving from a gravity system to a combi. Next day it was lower, I noticed it and I raised the issue with the installer who said it was the water pressure into the boiler and that it fluctuates due to demand in the locality.
So to the experts on here. Seeing as I am getting so low flow rates compared to spec and I had, when first used the system, seen much higher flow rates do you think that something in the boiler has failed? or do I need to add a secondary pump?
Also I know WB service offer a fixed fee service but also the option of paying just over 200 quid and this covers parts that may be needed if a fault is discovered, so a recommendation as to whether I use this option would be appreciated.
Thanks in advance.
When I turn the cold tap on at the same time as the hot water is on it just about doubles the flow so I assume the mains pressure is fine. The funny thing was when I had the boiler installed 2005 the first day when the installation was finished the hot water absoultley gushed out of the tap, much to my surprise as I was expecting there to be a difference moving from a gravity system to a combi. Next day it was lower, I noticed it and I raised the issue with the installer who said it was the water pressure into the boiler and that it fluctuates due to demand in the locality.
So to the experts on here. Seeing as I am getting so low flow rates compared to spec and I had, when first used the system, seen much higher flow rates do you think that something in the boiler has failed? or do I need to add a secondary pump?
Also I know WB service offer a fixed fee service but also the option of paying just over 200 quid and this covers parts that may be needed if a fault is discovered, so a recommendation as to whether I use this option would be appreciated.
Thanks in advance.