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Increasing water pressure on combi boiler
I am looking at what ways I can increase water pressure in my shower.
Right now I have a vaillant ecotec plus 824 (which is stated to produce a flow rate of 9.2l - according to Google). I tested the rate I am getting at mains in my kitchen.
Cold is roughly 8l per min
Hot is roughly 5l per min
Now I am getting told different things. E.g you can't fit a pump in the shower as I have a combi system. Others say I can as its not fitted to the combi its fitted to the shower?
Anyways I went with the assumption a pump can't be fitted according to my research. I was thinking the only way to achieve this was a cold water storage (ST and Powertank sell a package tank with pump). If mains pressure exceeded 9.2l of what the boiler can handle, what happens to different tap outlets if both continuously on? They would share the 9.2l the boiler can handle? Or both would get 9.2l?
Are there any other ways to increase my water pressure on a combi boiler? I assume changing to a diff combi boiler wouldn't help as mains is still only getting 6l per min?
Any help would be appreciated!
4 Answers from MyBuilder Plumbers
Best Answer
It’s all to do with your water main. I assume it’s a lead pipe... your best option is to replace it. You can boost pump a lead main as it will collapse.
The regs for a lead main replacement are simple.. dig a 750mm trench from your property to the boundary wall... lay a 24 mdpe pipe and wait for the WaterBoard Inspector or Approved plumber to sign it-off. Then fill the trench and they will connect it ASAP.
You will probably have much better pressure and flow rate :)
Answered 26th Jun 2020
你可以去一个新的大的主要这将给you greater volume but not pressure,pressure is dictated by your water board,minimum .7 of a bar,there are ways to boost your mains pressure ie a mains booster,break tank and pump,expensive but will increase pressure,but not volume flow rate into premises,talk to your water board and a qualified plumber.the 9.2 lt is the maximum amount of heated water the boiler can heat and provide,opening more than one outlet may mean nearest to boiler gets most water furthest gets less,your best bet is to get a gas safe plumber to look at it for you.
Answered 25th Jul 2020
You can use a mains pump after the internal mains stopcock. Weather that gives you a much better pressure needs to be worked out. Stuart turner make one of the best mains boosters.
Combi waste of time should never been installed if Pressure is low. Agree with the other answer upgrade the main.
Answered 25th Jul 2020
You could try boosting your low pressure by putting a pump on the main supply so when you open a tap and the pump kicks in to increase the pressure.
Hope this helps
Answered 25th Jul 2020
