Unvented cylinder advice
Discussion
Currently have poor pressure at basin/bath/shower in 1930s 4 bed detached house.
Pressure and flow rate have been tested at just over 2 bar and 17 litres/min.
From what I understand, this is a bit borderline as to whether I'd get much benefit from an unvented cylinder.
Looking for options that don't involve noisy pumps.
I've heard about upgrading the mains feed. Is this likely to improve flow? Obviously I'd rather not have my front garden and drive dug up, just to cost money and make a lot of mess!
Pressure and flow rate have been tested at just over 2 bar and 17 litres/min.
From what I understand, this is a bit borderline as to whether I'd get much benefit from an unvented cylinder.
Looking for options that don't involve noisy pumps.
I've heard about upgrading the mains feed. Is this likely to improve flow? Obviously I'd rather not have my front garden and drive dug up, just to cost money and make a lot of mess!
I may be completely wrong but I was under the impression that an unvented cylinder does not generate or increase water pressure, so how would it be of any benefit?
Have you considered a modern main water pump, e.g. Salamander Pump https://www.youtube.com/watch?v=fURajD17BBQ
Have you considered a modern main water pump, e.g. Salamander Pump https://www.youtube.com/watch?v=fURajD17BBQ
olimain said:
What's your incoming main made of and do you know the diameter? Ours was lead so I had it replaced with 32mm plastic so we could fit an unvented cylinder - made a massive difference to the flow. We had it moled in to save digging the whole front garden up!
No idea, but 1930s, so wouldn't be surprised if it was an old lead one.iambigred said:
I may be completely wrong but I was under the impression that an unvented cylinder does not generate or increase water pressure, so how would it be of any benefit?
Have you considered a modern main water pump, e.g. Salamander Pump https://www.youtube.com/watch?v=fURajD17BBQ
Unvented cylinder basically gives you hot and cold water at mains pressure.Have you considered a modern main water pump, e.g. Salamander Pump https://www.youtube.com/watch?v=fURajD17BBQ
Would consider a mains pump if it was likely to be very reliable and quiet! Would rather not add a pump to the system though.
Southgate said:
olimain said:
What's your incoming main made of and do you know the diameter? Ours was lead so I had it replaced with 32mm plastic so we could fit an unvented cylinder - made a massive difference to the flow. We had it moled in to save digging the whole front garden up!
No idea, but 1930s, so wouldn't be surprised if it was an old lead one.If it looks like lead, then you can call your water company and they may replace it.
hyphen said:
Why don't you go and look? The pipe that comes into your house and have a stopcock on it.
If it looks like lead, then you can call your water company and they may replace it.
Just been to look. It's all nicely boxed in and painted, with just the stopcock poking out. Think I'd make a mess trying to get at it.If it looks like lead, then you can call your water company and they may replace it.
lanky28 said:
what type of system have you got at the minute? where was the test carried out, on a tank fed tap or mains fed tap? you would only install an unvented in somewhere with good mains pressure other wise its a waste of money, how many bathrooms have you got?
Current system is normal boiler, vented hot water cylinder with header tank in loft.Test was done on mains fed tap. We only have one bathroom and one downstairs toilet and basin.
Was thinking unvented cylinder was the way forward. Now not so sure we have good enough flow and pressure from mains...
Southgate said:
Unvented cylinder basically gives you hot and cold water at mains pressure.
Would consider a mains pump if it was likely to be very reliable and quiet! Would rather not add a pump to the system though.
You supply an unvented cylinder with mains water where a pressure reducing valve reduces it to around 3 barWould consider a mains pump if it was likely to be very reliable and quiet! Would rather not add a pump to the system though.
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