Ok will do. Thanks.
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New Central heating but problems, Please help
- Thread starter Dale Sanders
- Start date
View the thread, titled "New Central heating but problems, Please help" which is posted in Central Heating Forum on UK Plumbers Forums.
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
Beginning to lose patience with this one, loads of good advice been given, take it!
First option, upgrade cold mains from stop tap to boiler. If still not enough, and you will always struggle to have two outlets at same time with combi in the loft, then you could have megaflo for second bathroom with diverter valve off combi heating side. Increase main from boundary into house to 25mm.
First option, upgrade cold mains from stop tap to boiler. If still not enough, and you will always struggle to have two outlets at same time with combi in the loft, then you could have megaflo for second bathroom with diverter valve off combi heating side. Increase main from boundary into house to 25mm.
Yes I will upgrade to 22mm pipe.
I carried my question on to ask about the shower and it's the first I've heard about a megaflo so now it confused things even more as so many different things. First I'm being told I can't have a boost for flow now I'm being told I can
I carried my question on to ask about the shower and it's the first I've heard about a megaflo so now it confused things even more as so many different things. First I'm being told I can't have a boost for flow now I'm being told I can
Mega flow is an unvented cylinder.
So I can add that to my current combi boiler?
Hi. I have been reccommded to install a salamander home boost. Thoughts?
Never fitted one but I have heard stories where the pipe to the house is not big enough to supply the demand that the pump wants and the pipe has ran dry. But could just be a story?
It's only £250 in screwfix.
Don't mean it is any good though mate.
cant go over 12 lpm so about the same you have now
how you getting on dale?
Increased from 15mm to 22mm but no difference in flow. Had a plumber over and said a salamander home boost or an accumulator
Trouble is I keep going around in circles. Some say it won't work and others say it will.
Have successfully applied accumulator to system running only 8 lpm, to function withMegaflow. Look after other systems with this setup, working fine. About to install another accumulator system boosting from 22 lpm to 45 lpm at peak. I think for a lot it’s the unknown and sizing and adequate pressure is prerequisite. Consult accumulator manufacturer if in doubt. Otherwise the only other options for you is break tank with booster pump at low level or storage gravity fed at high level. There is no cheap and easy way to overcome this.
Why are people on here tell me it will work and 2 different plumbers who came round told me it will work then?
We are not right all the time. The advice we give is based on our own knowledge base. In this trade what works for one property does not necessarily work in another. I for instance try to offer the best advice I can to a reasonable cost to the customer. You may fit an accumulator and you will be no better off at all. But I for one would like to know the outcome if you do manage to fix your issue.
My above post was supposed to say may be no better off at all.
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