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. 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...
  2. 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...
  3. 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...
  4. 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?
  5. 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.
  6. 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...
  7. 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...
  8. 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.
  9. 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...
  10. 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...
  11. J


    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?
  12. 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...
  13. 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...
  14. 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...
  15. Paul Haynes

    Can't reply to your 'which energy supplier do you use?' question!!

    Your system just says my reply looks like spam every time!!
  16. PedroM

    Nest Thermostat can't detect OpenTherm connection on a Baxi boiler

    Hi, I live in Lisbon and I've just installed a Baxi combi boiler and connected it with a Google nest 3rd generation thermostat as the picture below depicts. The issue is that the nest thermostat can't detect the Boiler's OpenTherm connection and displays the following error: Does anyone has...
  17. W

    Can't adjust thermostatic shower mixer

    I moved into a property recently and having problems with the shower in the main bathroom. The temperature's always too cold when the dial is turned to the hottest setting. There's scalding hot water getting to the taps and the en-suite shower so I'm assuming the thermostatic shower knob needs...
  18. B

    Can't find correct sink pivot rod

    Hi all. I'm hoping someone can help me. I'm in the UK and really struggling to find a replacement sink waste pivot rod with a 12mm diameter ball on it. The ball is too big on all the "universal" ones I can find. Does anyone know where I can buy one please?
  19. J

    F.22 Vaillant EcoTec Plus 630 - can't locate filling loop

    Hello - I have an f.22 error on this system boiler, 0.4 bars. Just moved into this house so not certain on how everything works. There are no taps under the boiler to add more water. There is a hot water cylinder in the cellar so thankfully it's just heating that we have lost. With this...
  20. H

    Can't unscrew kitchen tap-water valve in order to replace it...

    Hey guys, I have a one-exit water valve under the sink leading to the cold tap above. I'd like to replace it with a multi-exit valve so that I can connect the dishwasher to the main water-line. Fine, I thought. I've got myself a multi-exit valve and just need to remove the old one. This is where...
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