How to increase water pressure and flow rate in Combi boiler house on a hill?

Hi, If the roadside water mains have been changed, than the pressure and the flow should be good, but only if the pipes from the road to your house are sufficient for the demand. 1. The water mains tap for your house might not be fully opened (most properties have one, usually small square lid on the pavement outside the property) - if it is check if there is another valve somewhere in the house. Check if it's open all the way. Finding it would tell you what size and type of pipe you have from the road to the house. - if the taps are fully open than the water mains pipe size from the road to the house is not sufficient. 2. I'm pretty sure that not fully open tap/taps might be the issue, as having combi boiler installed in order to operate properly minimum 10-12 l/min flow and 0.8-1 bar pressure on the cold water mains is required or there is another possibility the boiler being installed by some cowboy builder or even gas engineer, who failed to perform all the important and necessary checks prior to commence the installation works. 3. Assuming you checked all of the above and the flow is still the same, the pipe running to your house is most likely lead and 15mm internal diameter. If that's the case you should get is charged with bigger- 25mm or 32mm MDPE for example. Assuming Welsh water are able to provide sufficient pressure and flow to the house, running bigger pipe would make huge difference and you won't need the Home Booster system mentioned. Considering that the shower you have at the moment is electric, meaning that there is only cold water supply to it, you would be able to install the second shower you want on the ground floor with hot water supply from your boiler (it won't need to be electric, as the combi will provide much better hot water flow rate). I hope my advice would be helpful and good luck! Regards, Dechko Enev - DN BUILDERS

Hi Peter. .you do have a few options. To increase water pressure, I would put a flow booster in to the main water cold feed going to the boiler..that would give you more pressure..if you had a power shower thermostatic you would have an hot and cold feed going to the shower unit ..I would of thought it's an electric shower you have cuz an power shower would come out of the shower head around 14 lt per min.. If you have an external stop Vale out side with you water meter I would check to see in open fully pressure to you house should come in at around 3 to 4 bar of pressure. .hope this helps . Regards dean ldm property maintenance ltd