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Proportionality is a general principle in law which covers several special (although related) concepts. The concept of proportionality is used as a criterion of fairness and justice in statutory interpretation processes, especially in constitutional law, as a logical method intended to assist in discerning the correct balance between the restriction imposed by a corrective measure and the severity of the nature of the prohibited act. Within criminal law, it is used to convey the idea that the punishment of an offender should fit the crime. Under international humanitarian law governing the legal use of force in an armed conflict, proportionality and distinction are important factors in assessing military necessity.

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  1. A

    Will this brazing torch be suitable for general potable water plumbing?

    I salvaged a Bullfinch autotorch brazing kit from someone who wanted to get rid of it (Autotorch Brazing Sys : Autotorch brazing kit). It came with a 4 bar propane canister. I was wondering if this could be used for domestic plumbing of copper pipes? E.g. as brazing torches provide higher...
  2. M

    Should i go for an Unvented Hot water cylinder?

    Hi, I am about to have an old asbestos water tank replaced in the loft and also have a new shower pump fitted, however it occurred to me if i switched to an unvented cyclinder i wouldnt actually need either of these. Ive seen them in screw fix for about £550 which seems reasonable. I...
  3. T

    Suitable enamel to touch-up bath.

    I need to touch-up a tiny area of an enamel bath (about the size of a 20p coin). Is there any product available that I could obtain that would allow the bath to be used within a few hours of application? I have bought some EVERBUILD STICK 2 but this requires a 24hr period before being dry. I...
  4. D

    Suitable Pump for Pressure Tank

    Hi – We are looking a number of options to resolve our water pressure issues in our house. We've seen the following pump Stuart Turner Monsoon Extra Universal 5.0 bar Single, which appears to have amazing pressure capabilities, up to 5 Bars. We have 3 bathrooms with large shower heads and a...
  5. Inverness

    continuity earth rod for gas pipe suitable

    i serviced and did a landlord safety certificate today and it did not have any earth continuity was not visible i know it has to be a minimum of 600mm. the customer wants us to get it earthed. we will get a sparky to take a earth connection from gas pipe to the consumer unit. the problem is...
  6. R

    Would you agree this valve is suitable for use as a stopcock?

    Pegler Yorkshire - Pegler Yorkshire Tee Ball Valve 15mm Blue | Ball Valves | NoLinkingToThis G2.8 in the WRAS guide to the regs says 'spherical type valves may also be used in all sizes' R2.8 in the WRAS guide to the regs says '[o]ther types of stopvalves and servicing valves may be used provided...
  7. R

    Advise on Fernox F1 ( Is this Suitable for my system ? )

    I have just read the instructions on the bottle and it states this is "not suitable for single feed Indirect Cylinders" My system is an open vented system run from a Vaillant 438 System Boiler I have 1 Hot water Tank heated through a "Y" Plan and approx 13 Rads Is this product suitable for...
  8. A

    motorbike suitable tool bag

    Any of you emergency breakdown engineers work off a motorbike anyone seen any tool bags for sale designed for a bike
  9. S

    Low head pressure tmv suitable for unbalance supplies.

    Got a 'doc m' pack to fit soon in a working mens club, the hot is being supplied via a wall hung water heater, the type being fed by a little cistern above, the height of the water level is approx 2m above floor level and the tmv for the new wash basin will be approx 1.5m below water level. and...
  10. B

    Looking for silicon/ plastic glue/ expoy suitable for use with potable water

    Hi there, I have one of these: The little plastic tap has a crack in it which causes it to leak hot water. It looks like the tap will be a pain in the bum to change if it is even possible. Can anyone reccommend me something to glue/seal the crack which will be safe to come into contact...
  11. L

    Replacement for Wilo Gold RS60 Circulating pump ?

    Afternoon all I have a very noisy Wilo Gold RS60 circulating pump in my system at home. Apparently this model is now discontinued. Can anyone please suggest a suitable replacement ?. Not only in performance but to fit physically port to port between the isolating valves. When searching on the...
  12. N

    Suitable tool to remove undersink nut

    Hi There, I'm trying to replace a kitchen sink tap that has a seized up cold water handle. The existing tap has a large hexagonal nut under the sink holding the tap in, could anyone tell me what tool I would need to remove this? I was thinking maybe a basin wrench, but the one i've seen in B&Q...
  13. J

    Megaflo to replace boilermate 2000 with Micron 60ff Boiler?

    Hello; I have a Gledhill Boilermate 2000 and a Micron 60ff boiler. The Boilermate has 2 unrepairable leaks and i need to replace the system. Is a Megaflo system a suitable alternative? a few plumbers have mentioned that system and just want to check it will do all that the boilermate does...
  14. S

    Suitable replacement for DT10RF?

    Hi, I've recently moved house and I'm having problems programming the DT10RF thermostat for a 25SI Worcester Greenstar. I've switched the programmer off and on and begun to program to the timings I require. However, using the plus/minus buttons, the time just stops at 5.08. I can't get it to...
  15. J

    Low Pressure taps - high pressure system

    Hello I have seen some taps/ shower head i like for my bath. on the website it says " suitable for all baths with low pressure water systems" " Liquid Pressure 0.5 bar" I live in a new build with a combi boiler which shows just under 2 bar. Can i use theese taps? does it really...
  16. N

    Are Floplast Barrier Pipes Suitable for a Central Heating System?

    Hi, I am currently having a new central heating system put in and the pipes being used are 15mm Floplast Barrier pipes? We have had a couple of people say that these are the incorrect pipes to use for a heating system and wanted some advice from other plumbers who have a better idea than the...
  17. S

    Leak on shower pump

    Hey guys, one of the flexi hoses on a shower pump is leaking. Couldn't find a suitable replacement hose at any local merchants. Only a small leak, any recommendations for a sealant that would be suitable? For sakes of not forking out on a new shower pump. Plumbers gold or some putty do the...
  18. L

    Will this replacement shower pump be suitable?

    Hi, our shower pump is acting up. Is very noisy when operating and often gets stuck on. The pump sits under our bath tub with the water tank in the loft. It is a salamander RSP50, i have found a really really good deal on a salamander RHP50, will this one be fine to replace my existing one...
  19. W

    Kitchen tap suitable for "gravity fed systems only"

    Swirl Divine Mono Mixer Kitchen Tap | Kitchen Mixer Taps | NoLinkingToThis Presumably this can't mean tank cold too as it's a kitchen tap. Anyone come across a tap that says that before? Perhaps the hot side is made in such a way that it would be an uncontrollable jet if put on mains hot from a...
  20. M

    Which NVQ will be most suitable?

    Hi all, I am currently doing my NVQ level 2 in plumbing and heating and fortunately working within a small firm as a plumber. I'm after some advice on what path I should take on completion of this course? My long term goal is to be a plumber and gas engineer on domestic. I already help with...
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