I would do 22mm to the boiler that should sort it unless your mains flow is 10lpm
Any ISO valves on the hot pipework that arnt full bore get them changed as well
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New Central heating but problems, Please help
- Thread starter Dale Sanders
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I would do 22mm to the boiler that should sort it unless your mains flow is 10lpm
Any ISO valves on the hot pipework that arnt full bore get them changed as well
Mains flow is 14lpm.
Do you think the 15mm is restricting it
Do you think the 15mm is restricting it
yea
Why don't you think an accumulator will benefit my system? Why won't it work
because you will have 10lpm coming out, they dont increase the flow
Don't they store water so will push water at max flow through 22mm pipe as they compress?
I see you logic here but upgrade the pipe and iso's
Chap I work with always increases mains to combis in 22mm all the way. He doesn't win jobs on price, but gets a lot from recommendations.
At home I only have 15mm but family have learned not to turn tap on when anyone the shower. Even thought of putting a solenoid valve on mains but managed so far. also we turn dishwasher and washing machine off. You learn to live with it. Worse at 7-8 in the morning when incoming pressure low. Might put in mains boost pump.
At home I only have 15mm but family have learned not to turn tap on when anyone the shower. Even thought of putting a solenoid valve on mains but managed so far. also we turn dishwasher and washing machine off. You learn to live with it. Worse at 7-8 in the morning when incoming pressure low. Might put in mains boost pump.
I am struggling to understand.
I have spent 5 grand on a new combi boiler to control heating and water from electric storage rads and electric thermostat controlling the water in a cylinder. The hot flow was as good as the cold.
I am prepared to spend more money to get the flow up but what is a guaranteed fix to improve flow on hot?
I have spent 5 grand on a new combi boiler to control heating and water from electric storage rads and electric thermostat controlling the water in a cylinder. The hot flow was as good as the cold.
I am prepared to spend more money to get the flow up but what is a guaranteed fix to improve flow on hot?
Upgrade pipe as stated before and as shauncorbs has said change ISO valves to full bore.
Ok will do. Thanks.
Are you wanting to run more than one outlet at the same time tho ?
I have just been up in loft and was under impression by my plumber that he changed to 22mm up in loft but it runs 15mm from mains in all the way to the boiler.
Yes I would like too run 2 outlets at the same time
There's your problem you won't get 14+ lpm out of 15mm with elbows etc
Sorry to say you will struggle to have two outlets open at the same time With a combi
Best option would be heat only boiler and unvented cylinder if your flow and pressure are ok
Am I getting a new bathroom and want a powerful shower. Can I put a boost for water pressure on the shower?
Nope as your on a combi
You need to think about if your going to need two outlets open at the same time e.g. Kitchen tap and shower etc if you are, you have the wrong system
What system do I need and what can I do too change
Three options but both require a new boiler
One heat only boiler with a unvented cylinder
Two heat only boiler and gravity cylinder with a pump
Three storage combi (Viessmann 222) depending on your mains flow maybe an accumulator if less than 20lpm
Also with it being in the loft you will instantly be on a downer as the pressure has to travel up three floors before reaching the boiler. Upgrade the pipes to the boiler. You should get more flow as long as you have the pressure in the mains
Edit. Got to be a cheaper option to start with
Edit. Got to be a cheaper option to start with
Why can't I just put an accumulator on my combi.
Can't put it on the hot side
And cold side your only getting 14lpm through the boiler
No I'm getting 10lpm through the boiler
Yea but that's because of the 15mm pipe or mains supply not the boilers fault
So how does an accumulator work
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