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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. P

    System losing flow/pressure

    Hello everyone, I have a problem that has stumped two plumbers so I thought i'd come to a forum to see if anyone out there has had a similar problem. I live in a top floor flat with its own water supply. The tap in the kitchen has 12litres per minute flow (near where the water enters the...
  2. G

    combi boiler system draindown problem

    during drain down of system with all trc open and bleed valves open water just continues to drain out and boiler pressure remains at 1.5bar.Baxi combi boiler 105
  3. P

    Ferroli system boiler CH comes on when HW called

    Hi, would appreciate any thoughts on the below. I have an almost 10yr old Ferroli Modena 32S HE system boiler. (I am aware of their reputation! ) 2 weeks ago HW went lukewarm. When HW was called, the rads came on. The cylinder motorised valve has been replaced today, but it's not fixed the...
  4. M

    Power flush & system corrosion

    In December 2022 (i.e. 5 months ago) I had a full system power flush conducted. Now the previously clear UFH flow gauges are black again. Is it possible that enough internal corrosion could have occurred in this time period? I had a separate plumber out a month ago to test some pipework and he...
  5. M

    What type of system do I have?

    Hi, I've recently moved home and would like to identify what type of system I have installed please. I've att'd a few photos. Please could someone help with this? I don't thinks it’s a combi, but may be wrong. There is no expansion tank in the loft thank you !
  6. C

    Replacing Honeywell Smartfit system.

    I’m about to replace my Honeywell Smartfit system with a conventional 2 channel heating pack (I’ll need new valves to replace the low voltage Smartfit units). I was initially looking at something basic like the Drayton Twin Zone Heating Control Pack, but would prefer a wireless stat if...
  7. M_Nash95

    Ideal System 15 losing pressure; pressure dial violently twitching

    Hi there, I am renting at the moment. Our boiler is an Ideal System 15. Within an hour or two of moving in and turning the heat on the boiler lost pressure. Now it loses pressure any time that it is turned on. If the boiler pressure is set below 1.5 bars cold it will lose all pressure in about...
  8. H

    System boiler modulation with low loss header LLH

    Hi there, thanks for taking the time to read this. I've been trying to diagnose why my gas consumption is so high and been doing various measurements and tests. With the UFH, my setup is about 10 room zones connected on two separate UF manifolds linked to one UF pump with a return blending...
  9. D

    Just to say Hi and give some info about my system

    Good day, I am not a plumber/heating engineer and don't don't tackle plumbing or electrics, having done a bit of both with variable success :). But I am an avid researcher and like to understand how things work and get the best out of them. The Glowworm Combi boiler that was in my small 2 bed...
  10. M

    Will Building Control permit a combined rainwater / sewage system?

    Our Victorian house's rainwater down-pipes are connected to the foul-water sewer. In order to accomodate new wider French windows I want to move the existing soil stack. When they see the plans or site do you think Building Control will want to alter the existing rainwater arrangements? All the...
  11. C

    Solid fuel heating system problem

    I could really do with some advice. Bit of back history, I have a trianco thorncliffe solid fuel room heater it has a back boiler, my dad put the system in just over 30 years ago, everything was bought from the then local fire shop, installed with lots of advice from them, the system has worked...
  12. D

    URGENT Noisy Nibe VVM300 heating system

    Hi all, I have been busy renovation a house that I bought a year ago during the winter. During the summer we switch off the heating system to conserve electricity as we are not living in the house. I removed some of the radiators during the wall renovations, refitted and bled the system. As soon...
  13. P

    E133 Baxi Megaflo System - But works fine in High Rate Mode!!

    As per the title. We have a property where the boiler has worked fine in the 10 months since it’s last service. Now throws up this error code randomly, and doesn’t reset. Our man has checked all the usual culprits. Condensate is fine, not backing up. He can put the boiler in High Rate mode and...
  14. N

    Both Water and heating valves opening when either system called for

    Replaced the head of a Honeywell 2port valve on heating and wired into an old block (S) like for like. However, when either water OR heating called for, both valves open! Ideas?
  15. L

    Weird heating system

    Im just wondering if anyone can give me some advice as had 2 plumbers round and still getting same issue. Ive recently loved into a new house and the heating system is doing something weird. It had a new worcester bosch boiler a couple of years ago and heating system seems in good order. But...
  16. V

    Hot water system not calling for heat?

    Hi. I'm hoping someone can help me to understand how our hot water system works (or maybe isn't!). We have had a new unvented system for hot water and heating put in. The gas boiler is the original one. Our problem is with the hot water. We get a cylinder full of hot water, which is good. But...
  17. S

    Help identifying type of pipe system

    Can anyone identify this adapter? It's 22mm copper to an unknown plastic piping system (non-standard size, I think it's 25mm or similar). It's on an older UFH system. Failing that, any alternative suggestions are welcome. I need to replace the mixing valve and the manifold, so due to the new...
  18. R

    Hot water system issue

    Hi there, We have a standard gravitational system at home and a Salamander pump CT force 30pt is part of the hot water system for the 2nd floor. For the last three months, the pump didn't work well and wasn't starting to generate pressure each time we opened the taps/shower handle. At the...
  19. A

    Whistling Heating System

    My heating system makes a whistling noises immediately after being turned of or begins to cool after reaching temperature set. I have found a leaking thermostat control, adjusted the pressure on the boiler and bled radiators but it hasn't made any difference. There is no noise at all when the...
  20. M

    Honeywell Evohome with Worcester Bosch Greenstar System Boiler

    I need a little help if possible as I am trying to check that my current system is running efficiently but not really sure how to check, sorry if this is a long one and I have tried to contact a Honeywell connected specialist but they dont seem interested unless installing a new system and the...
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