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The English modal verbs are a subset of the English auxiliary verbs used mostly to express modality (properties such as possibility, obligation, etc.). They can be distinguished from other verbs by their defectiveness (they do not have participle or infinitive forms) and by their neutralization (that they do not take the ending -(e)s in the third-person singular).
The principal English modal verbs are can, could, may, might, shall, should, will, would, and must. Certain other verbs are sometimes, but not always, classed as modals; these include ought, had better, and (in certain uses) dare and need. Verbs which share only some of the characteristics of the principal modals are sometimes called "quasi-modals", "semi-modals", or "pseudo-modals".

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  1. D

    UK Can't get stopcock 100% closed to allow a tap repair

    I have a plumber coming tomorrow to change a cartridge on a badly dripping tap on my bathroom mixer unit. There is no separate isolating valve for this tap so I'll have to close the stopcock. I tried closing it today but it won't go absolutely 100% closed and there is still a very slight flow...
  2. B

    TRV Valve is leaking out of pin

    Rad is leaking from TRV valve, seems to be seeping out of where the pin comes up. I tried tightening up the nut below the pin, but that didn't help. I then looked online and saw that removing the nut and packing with some plumbers tape may help, but whenever I try to remove the nut a load of...
  3. C

    Can't isolate outside tap

    I have been trying to turn off my outside tap for winter. When I turn the valve under the kitchen sink, it fails to stop the outside tap from running. This valve does seem very stiff. I am assuming I have to turn the value clockwise since if I turn it anti-clockwise it actually starts dripping...
  4. J

    Can't post a question!

    Hello all I'm a householder in Dorset and need my post-meter natural gas supply pipe re-routing underground. Seems it's not a common job to carry out judging by the chin stroking of the Gas Safe plumbers I've asked. Anyway, I can't post my question about it - I get the "Oops . . ." message box...
  5. J

    Can't remove quarter turn tap head

    I can't remove the tap head for the cold quarter turn tap. The hot one comes off easily as it is not used much. How can I remove the cold tap head?
  6. W

    Boiler pressure too high can't lower it.

    Hi folks my partner has a Greenstar 30Si boiler, the pressure is just below 3 bar but for the past year or so water has been slowly dripping out of the overflow pipe. I've bled the radiator upstairs and downstairs drained about 2l out but the pressure doesn't drop at all. Any ideas? Thanks.
  7. C

    Can't find UFH manifold vent/drain valve

    Hi all, I can't locate the vent/drain valve on this manifold. My manifold resembles the "UFH Manifold RUB-RT1tm4" model on this webpage: https://www.thermo-floor.co.uk/underfloor-heating-manifolds.html I an intending to replace on the the actuator pin-valves and I think I need to drain (or at...
  8. P

    Just can't figure out the leak under my bathtub...

    Hey guys, My bathtub drain needs to be replaced again. The cross in the bottom wore out again and the pop up stopper has nothing to connect to. I've done this four or five times before. This last time though, no go. I've tried at least a dozen times. I get a slow drip out of the bottom of...
  9. F

    Why can't I get Upstairs radiators to work independently

    Hi, wonder if anyone can give some advice. Recently moved into a new property. It has external OIL combi boiler which is new and works well. Downstairs has underfloor heating - which works well. Upstairs has wall radiators - which work well - but ONLY if the downstairs thermometer is calling for...
  10. R

    Can't Post New Member, Spam etc

    Hi, I need some urgent advice but it won't allow me to post, post contains spam or something, any help appreciated, thank you.
  11. jcsawyer

    H37XL and Greenstar 12i - Can't get the heating zones to work!

    Hey folks! I have been trying to get my heating up and running properly but I have had some trouble. I bought a new house this year and I have only just got to the point where I'd like to use the heating a bit. The house has two honeywell thermostats (Picture attached) one upstairs one...
    • jcsawyer
    • Thread
    • can't central heating system forum greenstar h37xl heating plumbing work zone zones
    • Replies: 5
    • Forum: Plumbing Zone
  12. J

    Can't get my head around the best thing to do....

    The situation is as follows. I have a shower enclosure which is slightly too small for the new shower tray. In a way this works to my advantage. I think. Why, because I stupidly bought 3mm wet wall panels. I didn't forsee the issues this would cause. (The panels not being thick enough to overlap...
  13. S

    Replacement inspection cover, can't find a replacement

    I have an inspection cover on my driveway, the cap has cracked and broken, i managed to get it off (unscrew) but now can not find a replacement via the usual outlets. Is there an alternative solution anyone would know about? Or if i need to fit something else would you recommend? Pipe Diameter...
  14. J

    Can't connect cistern inlet connector because of inlet filter

    Hi. I think the title says it all really. I was just lining up pipework and stuff and noticed that the Speedfit 15mm X 1/2 BSP tap connector won't connect to the cistern inlet because the inlet filter protrudes out too far to allow the rubber washer on the connector to sit against the outer...
  15. J

    Advice combi boiler plumber says can't fix expansion vessel/access it?

    Hi there, I was wondering if anyone could advise if I should get a different plumber for a 2nd opinion. Basically, my combi boiler is in my attic. It is overpressurised at the moment and the overflow pipe always drips. I had a plumber round, he seemed good and honest and knew the neighbour so...
  16. J

    CAN'T REMOVE IDEAL STANDARD SOFT CLOSE SEAT - TOP FIT

    Hi, I'm trying to remove a knackered old Ideal Standard top fitted soft close seat but it won't budge. It looks like there are Allen bolts inside each of the metal barrels, but they won't move and the key is slipping. Short of taking a hacksaw to it, is there something I'm missing?
  17. dilligaf

    Can't Change Flexi Tails Grohe Bau Kitchen Mono Mixer Tap

    Okay so I went and purchased this nice Grohe Bau Curve Kitchen Mono Mixer Tap and I knew it came with 6mm bore flexi tails which was fine because I thought I'll just change them with 8mm bore flexi tails that I purchased at the same time. When I tried to undo the preinstalled flexi tails from...
    • dilligaf
    • Thread
    • america can't change flexi flexi tail grohe kitchen mixer mixer tap mono tails tap usa
    • Replies: 4
    • Forum: USA
  18. Muskopia

    Can't get a plumber - DIY advice

    I'm renovating a house. Can barely get ANY tradesman (I need alot of work done). Did all my own electrics - now for plumbing! I want to use six 4-rail manifolds(pictured) to run 10 radiators. 3 for flow, 3 for return attached to 22mm. Located in a central place (under landing floorboards) then...
    • Muskopia
    • Thread
    • advice america can't diy plumber usa
    • Replies: 8
    • Forum: USA
  19. B

    Can't get one radiator hot - what can I try next?

    I'm sure this sort of topic has been discussed to death & believe me, I've tried everything to resolve it, but failed... Bosch 30CDi system boiler, S-plan with12 radiators. All radiators heat up as expected apart from one in the kitchen. If the boiler runs for a fairly long period, the...
  20. Chrisae

    Oil boiler question - can't get heating on

    Hi All, Just moved into a new house which has oil central heating. There is a Honeywell thermostat in the house which I think I have worked out. The boiler is in an out house. From what I can see the heating should be on. The controls look as follows. I'm pretty sure there is some oil in the...
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