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Worms are many different distantly related bilateral animals that typically have a long cylindrical tube-like body, no limbs, and no eyes (not always). Worms vary in size from microscopic to over 1 metre (3.3 ft) in length for marine polychaete worms (bristle worms), 6.7 metres (22 ft) for the African giant earthworm, Microchaetus rappi, and 58 metres (190 ft) for the marine nemertean worm (bootlace worm), Lineus longissimus. Various types of worm occupy a small variety of parasitic niches, living inside the bodies of other animals. Free-living worm species do not live on land, but instead, live in marine or freshwater environments, or underground by burrowing.
In biology, "worm" refers to an obsolete taxon, vermes, used by Carolus Linnaeus and Jean-Baptiste Lamarck for all non-arthropod invertebrate animals, now seen to be paraphyletic. The name stems from the Old English word wyrm. Most animals called "worms" are invertebrates, but the term is also used for the amphibian caecilians and the slowworm Anguis, a legless burrowing lizard. Invertebrate animals commonly called "worms" include annelids (earthworms and marine polychaete or bristle worms), nematodes (roundworms), platyhelminthes (flatworms), marine nemertean worms ("bootlace worms"), marine Chaetognatha (arrow worms), priapulid worms, and insect larvae such as grubs and maggots.
Worms may also be called helminths, particularly in medical terminology when referring to parasitic worms, especially the Nematoda (roundworms) and Cestoda (tapeworms) which reside in the intestines of their host. When an animal or human is said to "have worms", it means that it is infested with parasitic worms, typically roundworms or tapeworms. Lungworm is also a common parasitic worm found in various animal species such as fish and cats.

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  1. M

    Glow worm Ultracom 24 firing issue

    Went to a customer today their glow worm Ultracom 24 HE goes to fire up then cuts out turning the heating pump off, then does the same again before firing and running. Occasionally shows the flame is lit on display but flow temp doesn’t go much past 26. Then if you turn off and try again...
  2. R

    Help with replacement Glow Worm boiler options please

    I am looking for some basic advice please My house is on two floors, approx 240m2 and a spacious loft with good headroom and access. Glow Worm 30HXi boiler burning LPG housed in a ground floor attached storage room running 16 radiators including 6 doubles and a standard low output shower on the...
  3. J

    Glow worm boiler running cold water

    Hi all We have a Glow Worm combi Ultracom 38cxi boiler fitted in our house, which has been running really well for the past 10 years. Recently we have had an issue with the shower and water taps suddenly running cold water when we have the taps set to hot, the water will keep going hot and cold...
  4. Q

    Replacing a Glow worm Ultrapower SXI

    At some stage I will need to replace this boiler , any suggestions what would be a good choice in terms of size, efficiency, reliability, similar hot water flows etc … and what energy efficiency savings could be achieved in changing to a new boiler now ? The boiler does supply two bathrooms a...
  5. R

    Glow Worm 30sxi boiler hot water says no...

    I have a Glow Worm Ultracom 30sxi boiler that provides central heating and also heats a hot water tank. There are no error codes shown on the boiler but recently the hot water has stopped working. If I try and change the temperature under the tap symbol, it just displays 'no'. The boiler is...
  6. M

    glow worm energy firing for hot water when no demand

    Fitted a glow worm energy yesterday and is firing for hot water when there isnt a hot water demand, there are no leaks anywhere. Even when heating is calling the hot water demand is still overiding even though no hot taps are open. Has anyone got any ideas?
  7. dilligaf

    Glow Worm Micron 30FF Slight Yellowing Of Flame?

    I have a Glow Worm Micron 30FF and I cleaned the burner today. When I fired it up there was some slight yellowing of flames but is that normal? The other thing was the whole of the burner didn't light until I gently blew on the flames, I thought maybe this was due to the cover plate being off?
  8. B

    Glow Worm Fuelsaver 40B Mk2 Heat Exchanger Kettling

    I have an old Glow Worm Fuelsaver 40B Mk 2 installed on the kitchen wall. In November, the heat exchanger began making a kettling noise. It’s done this before. In the past, simply draining and refilling the system to flush out loose deposits was enough to stop the noise. In November 2021, I...
  9. Z

    Glow Worm Ultracom2 settings

    What water and heating setting for a Glow Worm Ultracom2? Also, when the house is left vacant for a couple of weeks during the winter do I change the boiler settings or do I turn the TRVs down low?
  10. G

    Glow worm boiler serial number age

    Hi I am buying a property with a flow worm flexicom 24 cx boiler. I am trying to find out age of boiler or installation date. I have the serial number. Is there a way I can check this pls
  11. TomGib

    Glow Worm Flexicom 15hx Leaking condensate

    I have a Glow Worm Flexicom 15hx that is leaking what I assume is condensate from the circled area, is this likely to be from the part of the flue that could also leak CO gas? Would the fix be as straightforward as replacing this plastic part if that is the source of the leak? Thanks!
  12. parboiled

    Re-pressurising brand new Glow worm boiler

    We have just bought a brand new Glow worm Betacom4 24K less than a month ago. The new boiler is already losing pressure, falling from 1.3 bars to 0.5 in a little over 4 weeks. The GS engineer set the boiler at 68, it's been fine, running great, noticed pressure fell slower at first but has...
  13. N

    Glow Worm Flexicom 30cx

    Hi all. Got the above combi which had an F25 (circulation) fault. Had new expansion vessell (was bad) then at advice of Glowworm a new diverter valve as hot water was OK but fault on heat. All has been perfect for a few weeks then back to F25. As before cutting power cures it. Always from cold...
  14. G

    Problems with glow worm 60ff

    Hi all, got trouble with a glow worm 60ff, both lights flash, reset and boiler on, when I turn the dial to reset it goes through the three start up sequences, then back to both lights flashing, if. I immediately turn it back to reset it then goes through the start up again and the boiler light...
  15. R

    Glow worm ultra com 30 cxi preheat issue

    Hi, does anyone know how to turn the preheat off on a glowworm ultra com 30cxi? It’s the one with the 3 round buttons, I’ve tried the - part of the tap button but it just brings it to the water temp setting so totally confused on what to do. Not even sure how it started up - never had it before-...
  16. J

    Glow Worm Micron 120 No Switched Live (Boiler Help)

    Hi All, New to this so not sure if posting this questions is valid, but i have a boiler issue which has baffled me. I have a Glow Worm Micron 120 boiler and it recently decided to die all of a sudden. I have had issues with the PCB in the past i.e i resoldered some dry joints a year ago. Thus...
  17. Stants

    Glo worm V ,s Worcester Bosch

    Hi I was having a Worcester bosch Greenstar 30 Ri ERP system boiler installed however its been suggested I changed that to a Glo worm system boiler of similar size basically which is best ?
  18. M

    Glow Worm burner cycling on Pmax when trying to gas rate

    Hi I am gas safe registered, when commissioning glow worm Ultimate 3. Have put into p.01 to gas rate and set at Pmax, but burner keeps cycling on and off rather than running at full rate, so am getting incorrect gas rate, any thoughts?
  19. I

    Glow Worm Ultracom 30cxi - Hot Water misbehaving!

    Boiler was working fine but now whenever I take a shower the hot water fluctuates from hot to luke warm. Looking at the boiler display, I can see the flames come on to max and hear the boiler working and then go down to min/off after a few seconds and then back on repeatedly. I checked the...
  20. T

    Glow Worm 45/60CF gas valve

    Hi All, I am looking to see if I can find a compatible gas valve for my Glow Worm 45/60 boiler part number UK48RBB01 any help would be much apricated.
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