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  1. S

    Been recommended to have 'closed system' for Megaflow set-up

    Further to my earlier post, the stat trouble returned and we had a plumber visit. Not our usual one, who was too busy, but another independent recommended by him (Gas Safe Register confirmed). He agreed it was the stat and has arranged for an electrician to fit a new one. While here, he had a...
  2. S

    Megaflow 3 bar pressure reducing valve placement

    Hi, Have lived in our house for around 10 years and always had bad pressure if more than one tap is running, toilet is flushed etc(hot and cold). We have (what I believe to be) a mains pressure system with a non vented Megaflow cylinder. We are about to install a new thermostatic shower and...
  3. G

    Smart Thermostat Megaflow & Underfloor Heating For Large Extension

    Hi All, After spending countless hours researching and driving myself mad i was hoping someone with experience might be able to offer some advice. We are totally renovating our house and installing a new boiler with megaflo style water system, and wet underfloor heating in a new large open...
    • Gary Oates
    • Thread
    • extension heating large megaflow smart thermostat ufh under floor heating underfloor underfloor heating
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  4. C

    Central Heating connections to Megaflow unvented indirect cylinder

    I believe the Primary flow and Return and Pipes to my Megaflow cylinder have been connected the wrong way round as the return pipe is much hotter the Primary flow. Will this in any way have a detrimental effect on the operational capabilities of the Megaflow cylinder.
  5. I

    Do you need a boiler with a unvented system such as a Megaflow (or other brand?)

    Hi, Question - we are planning to upgrade our heating and hot water system in the near future. We are oil 'fed' and have poor hot water pressure so were planning on getting a megaflow or similar system. Am I right saying that we need to have both a boiler as well as the Megaflow, or does the...
  6. M

    Megaflow bubble lost every three months

    I am trying to find out why my Megaflow CL210 loses its bubble regularly after three months and would appreciate any comments on why this might be. The current position is: 1. The unit was professionally installed in 1999 and seems in good condition. 2. There is secondary circulation system...
  7. M

    Megaflow service and problem solve need in Portsmouth.

    Hello I am looking for someone to service our megaflow (8 years old) and sort a problem out with it. Background. Our set up has always been a boiler serving kitchen/cloakroom taps and megaflow. The megaflow serves the bathroom bath/shower and sink. We've just replaced our faulty boiler with...
  8. N

    Megaflow tank air bubble refill

    Hi, I have looked on this site for the answer to this question but couldn't find it. My hot water pressure feels like its getting low. System is 7 years old and has never been touched apart from the normal yearly gas cert. All system is outside. I wondered if it was to do with internal air...
  9. L

    Megaflow indirect hot water cylinder.

    Hi, have Megaflo indirect unvented cylinder heated by gas boiler. Have noticed that when mains water stopcock is closed I can still draw hot water from the cylinder. Is this normal or is there a problem with the cylinder?
    • LSJ
    • Thread
    • cylinder empty hot hot water hot water cylinder indirect megaflow running until water
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  10. A

    what boiler solution is best? Need a new boiler

    My Keston 80 has stopped working and we have been getting quotes and varied solutions, I want the convenience of Combi but 2 out of 3 plumbers have said that isn't powerful or good enough for my home plus that the water tank a heatrae sadia megaflo is so good it better to keep that and replace...
  11. R

    Megaflow In a Rental Property

    I have just purchased a flat as a buy to let. My question is regarding the Megaflow Unvented Cylinder. I understand from this forum that the cylinder should be serviced annually by a G3 certified engineer. Is this a legal requirement? If so, does the servicing engineer provide me with a...
  12. R

    Draining a megaflow

    Hi I need to replace my kitchen taps. Ordinarily I would turn of the main house stopcock and drain the system - then fit the new taps However we have just had a "mega-flow" installed. If I do as described above will there be any issues when refilling the system ? i.e.airlocks etc ? Thank you
  13. A

    Worcester 32cdi compact combi boiler and Megaflow

    Hi there First post, so be gentle :90: We are renovating and extending our newly purchased house and it has a Worcester 32cdi compact combi boiler that is around 2 years old installed already. We are adding one bathroom (2 in total) and an additional toilet (2 in total) and we are putting in...
  14. J

    Megaflow Cylinder Problem

    Hi, I had a Megaflow 170i cylinder and a Worcester system boiler fitted a few months back and for the past month or so whenever the hot water comes on from the timer there is a loud bang/pop kind of noise coming from inside the cylinder and it happens every few minutes for about half an hour...
  15. P

    Megaflow combination valve Deptford London

    Hi, We have a noisy/slightly dripping Megaflow cold water combination valve (part no. 95605022) in our flat. Anyone in the area interested in coming to do the replacement? I believe this is the part: https://plumbsave.com/product/megaflow-cold-water-control-valve-95605022/ PM for more info...
  16. J

    Continuous running system

    I have a MegaFlow system, pump fed for HW and CH, gas boiler that wants to run constantly. Controller off (even removed from back plate) and the demand is still there. Pump is running v/v is open and boiler fires up.? Everything seems intact. Re-established Air gap in MegaFlow, system bled all...
  17. P

    Drain heating system ,megaflow, no outside drain off

    Hi can anyone advise? trying to fit a new radiator upstairs. There is no outside drain off valve and it is a megaflow system with boiler can anyone help give advice of how to do it? ( please move if this is the wrong forum)
  18. J

    Declining Megaflow capacity

    Hello all, Customer has an old Megaflow, the type with a white top, and is complaining that she is getting less hot water than she used to, gradually. The property has 2 of these, the other one is located elsewhere, and is working fine. The problem cylinder is located at the far end of...
  19. B

    Unvented megaflow hot water cylinder with regular boiler

    Hi, I've just recently moved home and lookingfor some general advice please from any experts out there. We have a HeatraeSadia CL210 Megaflo unvented hot water cylinder in the airing cupboard. The pressure forthe taps and showers is absolutely great but we've just started having centralheating...
    • bigbaddomy
    • Thread
    • boiler central heating system color cylinder hot hot water hot water cylinder megaflow oil regular system unvented water
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  20. P

    Drain off on unvented.

    Just changing an oil boiler on a job and they have just had a megaflow fitted. The installer has put a lever valve in, on the cold in with a tee connected to the discharge below the tundish as a drain off. Is it allowed?
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