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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. W

    I have a cracked 1.5" pipe elbow going into a 4" main drain under basement floor. How do I fix this?

    Hey guys My wife noticed water on the floor in our basement. What I can see is that the elbow is cracked where a 1.5" down pipe enters a 4" pipe that goes beneath the basement concrete floor. My thought is that I have to break up some concrete to replace the 4" pipe/clean out and reattached...
    • Whitbydad
    • Thread
    • 1.5" america basement cracked drain elbow fix floor going main pipe under usa
    • Replies: 17
    • Forum: USA
  2. S

    Main Multipoint BF Water Heater

    Hi, Customer has a Main Multipoint Balanced Flue water heater. Both the gas rate and burner pressure are under what the MIs state. MI state burner pressure is pre factory set at 14.1mbar and should not need adjusting and my checks showed burner pressure as 6mbar. Gas rate MI state 2.9 m3/hr...
  3. O

    New stopcock on rising main

    Hi I have an old 1950s house, and the stopcock on the rising main is quite stiff and difficult to access. I'd like to add a new stopcock in a more accessible position, but leave the old stopcock in place so that that I don't have to turn off the water at the property boundary. Is there any...
  4. S

    Redring Electric Shower - Water coming from main unit

    Hi all Would be grateful for any help you can give: Model: Redring Selectronic Premier - 2016 model Problem: Water spewing from the bottom of the main unit instead of coming out through the hose. I initially thought this was due to the PRV having activated but upon further investigation I...
  5. J

    rain water coming into Ideal Combi boiler through flue and causing main circuit board to blow.

    The main circuit board has gone 3 times in the last 3 months after heavy rain. I have a maintenance contract with British Gas but they will not keep replacing the board FOC. How can I stop his happening? The boiler is 7 years old and I have not had this problem until recently so what will have...
    • Jonas L
    • Thread
    • board boiler causing circuit combi combi boiler coming flue ideal ideal combi main through water
    • Replies: 11
    • Forum: Central Heating Forum
  6. J

    Regulations for fitting new water main from meter to house

    Hi, I'm having some issues with my current water main leaking. We had an extension put onto our house back in 2013, during which we moved our kitchen into the extension on the opposite side of the house. The stop tap was positioned in what would become the middle of our lounge, so the plumber...
    • JimUK
    • Thread
    • fitting house main meter new regulations water
    • Replies: 15
    • Forum: Ireland
  7. N

    I have a leaking pressure valve on my Main combi eco elite

    I have to replace my pressure relief valve on my Main combi eco elite as it is leaking , what sort of job is this ?
    • Nigel Kinseth
    • Thread
    • combi eco elite job leaking main pressure pressure valve valve
    • Replies: 3
    • Forum: Ireland
  8. K

    Need help opening up a Grohe mixer tap to change the main swivel O ring

    Hi all, looking for a bit of advice. I have a lovely Grohe kitchen mixer. Sadly, after many years of use, the main O ring seal on the swivel has perished and leaking badly. I've descaled her as much as possible but I am unable to release I guess, the threaded, upper part to expose the O ring. Do...
    • Knobbiewilliams
    • Thread
    • america change grohe help help needed kitchen mixer tap main mixer mixer tap opening tap usa
    • Replies: 1
    • Forum: USA
  9. B

    Hot water ring main in the bungalow roof void rather than screed

    We are considering having our house rads and hot water system replumbed so it's not buried in the 1970's screed that it is at the moment. The cement progressively eats away at the copper if it is not wrapped in Denzo tape (no way to tell without digging up the screed). We are thinking of...
    • bngimages
    • Thread
    • america bungalow hot hot water main rather roof screed usa water
    • Replies: 18
    • Forum: USA
  10. K

    Avoiding airlocks in central heating system teeing off from the main pipework

    central heating radiators to feed upstairs and downstairs main paperwork runs in ceiling void downstairs ,need to tee off to radiators downstairs do I tee off from above or below on the main pipework to avoid airlocks
    • Kevo
    • Thread
    • airlocks central central heating heating heating system main pipework system
    • Replies: 1
    • Forum: DIY Plumbing Forum
  11. D

    Boiler keeps tripping main fuse

    I have a grant vortex combi and it keeps tripping the main fuse when the programmer calls for heating. This has just started, it was working fine before. Anybody got any thoughts
    • Derek P
    • Thread
    • america boiler fuse keeps main tripping usa
    • Replies: 17
    • Forum: USA
  12. T

    Noisy pipes on cold main

    I am perilously close to losing my mind - so any help appreciated! About a month ago a vibrating sound started on our cold mains (copper pipes). This noise will often go on for 12-24 hours, always a loud rumbling sound that you can feel in the pipes. I am in a maisonette, and believe the cold...
    • toonlara
    • Thread
    • america cold main noisy noisy pipes pipes usa
    • Replies: 15
    • Forum: USA
  13. J

    Wax ring in main sewage line

    About 2 months ago I had a plumber out to remedy a rocking toilet. He pulled the toilet, noted the flange was 1 -2 inches low. He replaced the toilet and left saying he had to get approval for the repair. That night my shower wouldn't drain an the toilet was bubbling air while the shower was...
    • Jaded724
    • Thread
    • america main sewage usa
    • Replies: 2
    • Forum: USA
  14. G

    Main eco Compact 30kw question on rear pipework.

    Ive heard its possible to get the pipework up the back of this appliance by removing a baffle fitted to the boiler. Is this correct? Im having trouble getting it to fit inside a very tight cupboard with the standard stand off jig fitted. Ive been looking at the sizes on the website only and...
  15. A

    Is the my main water shut off?

    Hi, I'm trying to identify my main water shut off/stopcock in my house. For someone reason, the water meter is upstairs and I'm wondering if this is the shut off next to it? View: https://*********/a/ngeOrvv I know my neighbour shuts the water off from the street, when needed, so I guess...
    • adb
    • Thread
    • america main shut off usa water
    • Replies: 4
    • Forum: USA
  16. G

    install new water main pipe . Help on finding right insulation

    Hi, I`m on the process to replace my old main water main with a brand new MDPE 25mm. Anglia Water advised to put pipe it into a duct and then insulation. Does anyone know what type of insulation need to be used? Many Thanks
    • GioColchester
    • Thread
    • america finding help install insulation main new pipe right usa water
    • Replies: 3
    • Forum: USA
  17. J

    Advice? Gas meter and main supply valve newly enclosed after house extension.

    Hi, wondering if anyone can offer some advice? We just had an extension in the light-well house (lower ground floor), installing a glass roof to the light-well. This is where our gas and electric meters are, as well as the main supply valve. My concern is that this area used to be open and well...
    • jonnyb
    • Thread
    • advice after extension gas gas meter house main meter newly supply valve
    • Replies: 0
    • Forum: Gas Engineers Forum
  18. J

    URGENT Ignition issue Main Eco 30 Combi boiler

    Hi All, I have a Main Eco 30 Combi boiler I was fitted about 7 years ago, the whole pipe work is new and radiators. I have so far replaced the electrodes since it was old and bent (it was working but I wanted to avoid it failing), the heat exchanger was hoovered and the seal was replaced, the...
  19. J

    Ignition delayed/explosive Main Combi

    Hi All, I have a Main Eco 30 Combi boiler I was fitted about 7 years ago, the whole pipe work is new and radiators. There is one thing that annoys me on my boiler is that when ever is ignites it makes a small tiny explosive noise you can hear it from far 😫 I have so far replaced the...
  20. A

    Main 30 HE losing pressure after central heating heating been on

    Good Afternoon folks. Thanks in advance for any advice. I have a main 30 HE Combi. It loses pressure down to zero after the central heating has been on. If I start the day on 1 bar, it holds fine. Run the hot water/have a shower etc pressure goes up, then returns to 1 bar when turned off and...

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