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manhole

A manhole (utility hole, maintenance hole, or sewer hole) is an opening to a confined space such as a shaft, utility vault, or large vessel. Manholes are often used as an access point for an underground public utility, allowing inspection, maintenance, and system upgrades. The majority of underground services have manholes, including water, sewers, telephone, electricity, storm drains, district heating, and gas.
Manholes are generally found in urban areas, in streets and occasionally under sidewalks. In rural and undeveloped areas, services such as telephone and electricity are usually carried on utility poles or even pylons rather than underground.
In Australia, manhole also commonly refers to an access hatch used to get access from a room or hallway into the ceiling cavity of a building. These manholes are typically around 450 mm × 450 mm (18 in × 18 in) square.

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  1. H

    How do I open this manhole cover

    Hello, I need to open this manhole / drain inspection cover but not sure what type of key is needed. Does anyone know? Photo is of the 'keyhole' There are no other features on the cover (concrete) except for some unreadable letters.
  2. B

    HELP -Can not locate inspection Cover? Blockage

    Hi All I own 2 flats and the upstairs/first floor tenant has contacted me to say that the toilet and basin are slow at draining and she thinks there is a blockage. She stated she has tried various shop boought unblockers but nothing worked.... I went there and gained access to downstairs to...
  3. J

    Replacement Manhole/Inspection Cover 650 x 500

    I have a badly rusted manhole/inspection chamber cover which seems to be a non-standard size measuring 650mm x 450mm. Does anyone know where I can get a replacement cover with these dimensions? Before you ask the manhole slides under the wall with a lintel above it (god knows why they did it...
  4. GonisDowr

    wrong sized hole (manhole)

    We have manhole covers over the septic tank in the garden that are rusting and becoming weak. Without lifting the cover, I measured the size of the hole (i.e. the internal part of the frame ) to be 620x470mm. However, all the manhole covers seem to be 600x450mm or 24x18". Is my hole...
  5. B

    Odour from internal manhole cover - how to seal?

    Hi, I've an internal manhole cover in my garage, covering the main waste drains. Only moved into the house about 6 weeks ago but noticed it occasionally smells a bit cabbagey around the area of the cover. Have lifted, checked for blockage and cleaned out somewhat but still get a bit of smell...
  6. S

    ADVICE NEEDED REGARDS TO A POORLY MANHOLE

    Hi all, I have been battling with my local water authority with some ground movement problems next to a manhole. I have had builder round insists its a drainage issue causing the movement of the ground (water board responsibility). water board say they've been out, cleared the drains and...
  7. Q

    New Drain Line into existing manhole

    Hi all Im after some advice please. This is a bit difficult to explain so i have added some pics. I am adding an ensuite to the house. As part of this i am adding a new soil stack as the original soil stack is at the back of the property and ensuite is at the front. My problem is i need to...
  8. D

    Drainage advice just in case.

    Hello, Was just after some advice, I have no manhole cover on my property it is semi detached and so is my next door neighbour. I have looked on my house deeds and drainage search etc no sign of a manhole. But my next door neighbour has a square manhole in their backyard, would I be sharing...
  9. S

    Cellar conversion - digged and found this manhole , anyone knows what is it?

    I am doing a DIY project and trying to convert the under hallway cellar of a typical Victorian terraced house. I started digging the floor to increased the head height and found a manhole which seems to be from the sewage drainage, but to be honest I don't know. It has three pipes coming into...
  10. U

    Waste Manhole

    (New to forums and not a plumber) My mother-in-law has just popped round in a fluster. Apparently her next-door neighbour has had a builder round to discuss installing a new en-suite bathroom. As part of his checks he lifted the manhole cover outside their homes (they live in a terrace) and...
  11. D

    Saniflow Toilet System - wastepipes and manhole cover

    Hello Does anyone know what size and width a saniflow toilet waste pipe should be? Also is it normal to drill a hole in the outside wall of the bathroom to feed the waste pipe through the hole and stick the wastepipe directly into the manhole without a cover so folk can see directly into your...
  12. J

    find out depth between two manhole

    i have two mh cover nd invert lvl nd i need to find out some depth between two manhole
  13. M

    Access to manhole on neighbours property

    I am considering changing my kitchen to the front of my house. The problem I have is that the shared waste pipe I will need to connect to is on my neighbours side (including the nearest manhole). He is an awkward :nono: so I foresee problems. If I need the water company to gain access to connect...
  14. S

    Drains, combined or not?

    How can I tell if a drain goes to a sewer, soak away, rainwater only or combined? i don't have a manhole on the property (unless it's buried under the patio) so an't run some water off to test. I have posted a picture of the drain in question. Before an extension this drain was used for a...
  15. eagleeye

    manhole cover removal ??

    Any ideas how I can get this cover up ? It looks like it may possibly be locked with the 4 holes around the edge but I'm not sure. Feels like it's really wedged in there. Was told that 2 previous plumbers couldn't get it up but me being me I am never beaten. Need it up as there is apparently a...
  16. P

    Advice on manhole sealing grease

    I live in a small block of flats with a manhole cover in the hallway which occasionally stinks the hallway out. It's been replaced with a sealed manhole cover not long ago but it still stinks. I've found manhole sealing grease from a company in Kent but I was wondering whether I could use any...
  17. stani

    Manhole lifting keys.

    Anybody got a set of keys for this type of manhole cover?
  18. J

    Is this sewer manhole correct?

    Hi all I am new to the forum and would like to start with a question if i may. This is a photo inside a manhole in our front garden. The Left Hand pipe is the incoming side and this is fed from a manhole in the back garden that collects together water/sewage from the various foul pipes and...
  19. B

    A Nightmare - Confusion Between Homeserve & Thames Water - Advice & Help Needed!

    Hi All, This is a bit of a convoluted issue so please bear with me as I am not a trade professional & apologies for the length. If this in the wrong section, will the mods please kindly re-direct to the correct one! We have been suffering an infestation of rats in our house (semi detached...
  20. B

    Help With Garden Manhole Ant-Vermin Valves & Solutions!

    Hi All, We had a serious rat infestation in our home which I am trying to address. They were coming in via the drains from the manhole at the front of out house. This manhole is shared between us & our neighbours - our waste exits go off at an angle to our house & there is a straight run to...
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