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main

The Main (German pronunciation: [ˈmaɪn] (listen)) is the longest tributary of the Rhine. It rises as the White Main in the Fichtel Mountains of northeastern Bavaria and flows west through central Germany for 525 kilometres (326 mi) to meet the Rhine below Rüsselsheim, Hesse. The cities of Mainz and Wiesbaden are close to the confluence.
The largest cities on the Main are Frankfurt am Main, Offenbach am Main and Würzburg. It is the longest river lying entirely in Germany (if the Weser-Werra are considered separate).

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  1. S

    Main Combi 30 Eco Elitie Temperature Issues

    Hi Guys, Just changed a sink tap for customer and when turned the hot water on the boiler temp rose to 90 within few seconds and burner cut out, temp came down to 78 and the boiler then fired up again and keeps cycling like this. Customer said this has been happening for a few months now, I...
  2. Z

    Main Eco Elite Sump Gasket

    Hello, I've got a Main Eco Elite combi with a gap in the sump gasket (pretty sure that's what they call the part) so POCs are escaping, so needs to be replaced. Has anyone got any idea how long this is likely to take? I can't work out if the hole heat exchanger needs to come out or whether the...
  3. J

    Main Circuit Drain Valve?

    I just bought a Biasi 25c Combi boiler and I can't understand what the Main Circuit Drain Valve is for. It has a screw in plastic end so doesn't look like it's designed to attach a pipe to it to drain the CH system and even it did, it's higher off the ground than all the radiators so wouldn't...
    • jamesroberts74
    • Thread
    • america circuit drain main usa valve
    • Replies: 4
    • Forum: USA
  4. I

    Main 30 Combi Eco Elite display temperature

    Hi, I have the above boiler and had a user question about the display temperature on the front of the boiler. I can't seem to find the answer in any manuals. I wanted to know what the temperature that is displayed relates to ie the boiler temperature or the water temperature. Reason for...
    • iceman2010
    • Thread
    • america combi display eco elite main temperature usa
    • Replies: 6
    • Forum: USA
  5. D

    Single Zone UFH addition to main system wiring

    Advice needed please: I have an UFH installation as part of my main CH system. The UFH will never be required in isolation to HW or main CH, therefore keen to wire it completely independently of boiler and main wiring. All I want to achieve is the following: A new Room stat (in the location...
    • DIYTony
    • Thread
    • forum main plumbing single system ufh wiring zone
    • Replies: 0
    • Forum: Plumbing Zone
  6. S

    My water supply is somehow linked to neighbours water usage and it's affecting my shower (Shared main?)

    Hello Everyone, I hope someone can advise on this problem that is annoying me more and more. I live in a 1900s mid terraced property. My water supply is somehow linked to my neighbours water usage and this is now really annoying me. I can hear the water 'being run' through the water pipes in...
    • Shadweller
    • Thread
    • america main neighbours shower supply usa usage water
    • Replies: 14
    • Forum: USA
  7. B

    My Main boiler has no pressure

    Hello, I have just bled all my radiators in my flat and now I have no pressure on my boiler, it's flashing and showing a 🔧 sign, please help I need heating tonight.
    • Beckih
    • Thread
    • america boiler main no pressure pressure usa
    • Replies: 8
    • Forum: USA
  8. S

    Main Combi 24 HE Flame Failure

    Hi Guys, Got a Main Combi 24 HE which is stuck on flame failure. Customer had a gas leak on the gas run which was repaired, after this the customer turned the boiler on from the spur and the boiler is was stuck on flame failure which flashes slowly. When hot water demand is given the pin hits...
  9. O

    connecting ejector (pressurized) to secondary / gravity main line

    question about connecting an ejector pump to the sewer, where there is no existing conditioned structure that gravity-feeds: We have a lot that will be built in a couple years. Lot is sloped, with road and sewer main nearest to the up-hill lot line. The house will built in that corner, and...
    • ohnoflood
    • Thread
    • america connecting ejector gravity main secondary sewer usa
    • Replies: 21
    • Forum: USA
  10. D

    main isolation valve

    hi i im getting confused i recently got a combi boiler installed to replace a water tank which i no longer have, the problem im having is the isolation valve only stops kiching cold tap and nothing else, i think ive found the main water supply coming into the house but its already joined to the...
    • damo123
    • Thread
    • america isolation main usa valve
    • Replies: 4
    • Forum: USA
  11. D

    Internally shallower 3/4" Iron fitting needed, and weep on 3/4 female nut on main.

    I wonder if anyone can help, I've tried several plumbers merchants to no avail. I have removed an old stopcock, (which seized long ago, with a newer stopcock just above) as it had been leaking from several places, mainly at the bottom where it joined the 3/4" threaded female end on rising main...
    • Deleted member 123633
    • Thread
    • 3/4 iron 3/4inch america female fitting iron main needed nut usa
    • Replies: 3
    • Forum: USA
  12. L

    Finding where the main line enters house

    Hi everyone, I'm trying to locate exactly where my main line enters the house (inside the walls, not the slab etc..) i need to cut and cap it because i have already diverted it. Previous concrete renos have hidden the straight line from the main valve straight to the house, now i cannot see...
  13. P

    Communal Rising main water pipe

    Hi all. Doing a house renovation here at my flat that I owed for about 20 years have decided finally that time to spend some money on myself and live normally. Basically knocked out larder cupboards and walls making a kitchen diner finally got permission from the freeholders that took about 1...
    • Pipeman222
    • Thread
    • america communal main pipe rising usa water
    • Replies: 50
    • Forum: USA
  14. C

    AT RISK WATER MAIN EARTH BONDING THROUGH METER BOX BACK PLATE

    Could someone take a look at this for me please? Just had a boiler put in our property on a grant scheme. The boiler is great other than him not cleaning the pipework including gas joints before leaving 🙁. I've cleaned it up and it seems alright. My other main worry though was what the follow...
    • chris123
    • Thread
    • bonding earth earth bond gas meter main meter meter box meter hous part c 13 plate through water
    • Replies: 42
    • Forum: Gas Engineers Forum
  15. P

    Main Internal stopcock Sheared

    Hi, Unfortunately I find myself in a bit of a predicament.. The house I live in is very old, 1917 so I presume that this pipework with the stopcock is lead. I shut off the main and the shaft sheared, I attempted to grind a slot into what remained to hopefully open the water supply for a short...
    • polydevs
    • Thread
    • america internal main stopcock usa
    • Replies: 5
    • Forum: USA
  16. N

    Main Meter Stopcock key- How to identify

    I need to lower down the water pressure and have identify the stopcock at main water meter. I am not sure which one i need to buy. I have attached the picture although its not quite clear. Any advise will be helpful. Thanks
    • newbie910
    • Thread
    • america identify main meter stopcock usa
    • Replies: 9
    • Forum: USA
  17. R

    "Main" (Baxi) 24HE A Heat only boiler temperature setting

    Hi. Bored and wondering about a friend's boiler that was fitted a few years ago and that, having been involved with the heating system, I take an interest in. One of these jewels...
  18. T

    Baxi main Ecco 25 combi boiler bypass pipe 5114715 is leaking from both ends one end is fitted to the 3 way valve assy

    Baxi main Ecco 25 combi boiler the bypass pipe 5114715 is leaking from both ends one end fits into the the 3 way valve assy
    • Teddy164
    • Thread
    • america baxi boiler bypass combi combi boiler fitted leaking main pipe usa valve
    • Replies: 0
    • Forum: USA
  19. B

    Willis Immersion issue - no hot water getting to main tank

    Replaced a Willis (Belfast) immersion heating in an open vent heating system. Willis is working ok but flow of heated water see wrong and does not generate a lot of hot water. Symptoms are (See diagram): Flow from hot tapes fine (no air locks). Tank heats up using house oil indirect heating...
    • bigfish
    • Thread
    • america getting hot hot water immersion issue main no hot water tank usa water
    • Replies: 22
    • Forum: USA
  20. T

    Removing water valve on Main Multipoint BF

    Customer has a Main Multipoint BF that needs the diaphragm replacing. I'm attempting to remove the water valve but one of the screws that fix it to the bottom of the gas valve just won't budge. The head of the screw is completely stripped. My trusty neji-saurus screw pliers turned it about 45...

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