A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory and other systems sciences.

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  1. K

    Understanding heating/water tank system

    Hi, We moved into a new property yesterday and are a little baffled by the heating/water tank situation. The previous owners unhelpfully left any kind of instructions/manual and therefore trying to figure out ourselves. We have what looks like a boiler/water tank system (coming from a standard...
  2. F

    Replacing an installed megaflow system with a combi-boiler when current boiler needs replacing

    Home owner looking for some advice pls. We have a megaflow system which we are considering removing as the tank takes up a lot of space and we don’t find we are using more than one shower or bath at a time. Our plan is to do this when the current boiler needs replacing (probably in the next...
  3. alanmcm

    Moving into a new home and boiler system is 17 years old

    My daughter bought her first home and was hoping to convert to gas but its not available in the area, so thinking a boiler upgrade is the better way to go. Just after some advice and rough costs involved, is it worth getting a pressurised system installed and a new boiler and oil pump? Heating...
  4. S

    Repiping Central Heating System Advice

    I am repiping my whole house and changing from combi boiler to a 30kW system boiler & 250Ltr or 300Ltr unvented indirect hw tank. Can somebody give advice on my rough plans/sketches for repiping my radiators using 22mm & 15mm. I have only shown the flow line as the return line will just be a...
  5. E

    gravity fed upstairs shower pressure question

    We have a gravity fed hot water system in our the house we have just recently moved into. It works fine with the downstairs shower, however we are about to upgrade the upstairs bathroom and are considering installing a shower bath. My concern is that although there is more than sufficient...
  6. J

    Old un-pressurised heating system - top up valve

    Hi All, I hope you are doing well. I have old un-pressurised heating system and I need to top up the water but I cannot locate the bloody valve. Where is it? Is it in the attic? I also have this valve with black screw on top. Should this be opened or closed? Thank you
  7. Zig168

    Combi Boiler vs System Boiler

    I think the last discussion was back in 2021. A few questions to guide any discussion. Which are the cheapest to heat over the year, system or combi in an average 3/4 bed property? Which will be the more reliable and cheapest boiler type to repair over the next 10 years? Is there a better...
  8. chloeradhsaw

    One Pipe System Ideal Mexico 2 Boiler

    Hello friends - I really struggle to understand my heating and hot water system I posted my question on Diynot but it ended up being five pages and couldnt get to the bottom of it and I thought worth asking the elders on here for their view - Hot water temp is 40 Degrees - Ideal Mexico 2...
  9. C

    Ideal 32 system efficiency level

    I’ve had an Ideal Vogue 32max/gen2 system boiler to a Megaflo fitted a week and running it at Flow temp 73 degrees to getting a return temp of about 55 degrees C, I’m seeing the LCD screen saying the efficiency level is only 25-28%. Has anyone else seen such a low percentage? I know for a fact...
  10. P

    Is a fast recovery HWC a benefit for PDHW system?

    I am looking into a new Main eco compact / Baxi 618 system boiler set up for PDHW (if its possible) I was hoping to use the EPH controls priority hot water pack I currently have a 15year old HWC around 900mm tall by 450mm dia would I benefit from a new fast recovery HWC for the system (I...
  11. H

    can this be done in a pressurised heating system

    Hi all , on a pressurised heating system is it ok to take a flow and return up into the loft and down again to install new radiator also would it be prudent to put AAV at the high point , thanx in advance . Howy
  12. mattgriff88

    Flushing/Cleaning central heating system?

    Hi I have recently bought a house which is 17 years old. There was a small leak from one of the radiators So I took the pipe off and drained the radiator and the water was black/brown. I took the radiator off and flushed it out with a hose pipe out the garden but it's got me thinking and I...
  13. lollino

    Measuring Hot Water Consumption in Shared Recirculation System

    Hello everyone, I'm facing a rather complex situation and I need your expert advice. My neighbor and I share a boiler for hot water, and we have a single recirculation pump serving both of our homes. However, after the pump, the recirculation circuit splits into two separate branches, each...
  14. P

    Changing a system fill valve

    Hello, I want to change the system fill valve, but I’m struggling to dismantle the existing toilet to access underneath the tank, I’ve added some pictures can anyone advise of the steps? Thanks!
  15. T

    System loosing pressure. Think it is boiler and not circuit

    I have a Vaillant eco plus 837, year installed 2008. It works well. We have one large zone for the house with 13 rads running off it. We also have an UFH zone in the kitchen. Near the boiler I have 2 port valves which control this part of the system. The boiler has been loosing pressure...
  16. D

    There must be a better system design than this

    This is a picture of my sons sink plumbing. The yellow arrow goes to the dishwasher and the red arrow goes to the washing machine. There is a problem with waste water going from the sink, into the washing machine I guess because the pipe, right on the elbow isn't high enough. I have tried to...
  17. S

    New boiler to be fitted and low level UFH system

    I recently purchased the ground floor of a detached Victorian property in Dorset. As part of the refurb, I will need a new boiler and about 94m2 of low level UFH. The flooring is currently very solid floor boards.
  18. A

    GAH Electrastream boiler, low pressure level, how to top up system?

    Can anyone help me identify which tap/connection it is to top up the system as the level has dropped quite a way below the red marker for the cold fill pressure on the gauge? Boiler was installed approx. 2014. I've looked in the manual & online but can't find anything. Many thanks
  19. monkeydust

    Unvented System - Noise Issue

    Anyone know what might be causing this situation please? We have replaced the EV and non-return valve but still happens. Normal static pressure on that gauge is 2.5 but it builds up overnight to 3+ and then the problem occurs. Were a bit lost and had a few engineers look at it. At this...
  20. M

    Plumber Morts drinking water system in Mason City Iowa

    Water softener company in Mason City and Clear Lake, Iowa. We do soft water installation, Kinetico softener repair, K5 water system, reverse osmosis drinking water system. Also find us for Kienetico Cerro Gordo county, Kinetico Worth County, Kinetico hancock county.
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