Shower / Hair rinse regs for distance from toilet

Discussion in 'Plumbing and Central Heating' started by mattysupra, 24 Mar 2016.

  1. mattysupra

    mattysupra

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    Hi, im looking for some help please.
    Either a quote from the regs or better still a link to what the regs actually say please.

    New build and we paid for a hair rinse / shower thingy that is sunk into the top of the bath and pulls out of the top of bath like a shower head to wash hair while in bath.

    The problem, it only has around 2 feet of hose on it so renders it useless really. Apparently it cant be any longer as it has to finish 18" short of the toilet pan so that it cant possibly touch the toilet. I have been told this is a reg ?

    I can understand if it was longer to drop it in the actual toilet , but then should it be fitted with a none return valve like a garden tap?

    Any input on this please? can the hose be longer so it can be used for what was planned?

    Thankyou.
     
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  3. Madrab

    Madrab

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    It has to be clear of any CAT5 fluid to avoid cross backflow contamination but I don't believe that 18" is a given distance, my interpretation would be as long as the shower head cannot reach the WC. I assume the bathroom is mains fed water?

    I'd also want to be checking that the CAT3 fluid backflow from the bath has been provided for with at least a double check valve?

    Check page 2.

    https://www.wras.co.uk/downloads/pu...flow_in_the_design_of_domestic_bathrooms.pdf/
     
  4. mattysupra

    mattysupra

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    Thankyou for the replies.

    Yep i fully understand it not being long enough for it to actually be able to go inside the toilet bowl itself where it could back draw. But it finishes a fair distance away from toilet.

    I will get a picture tomorrow when im back on site.

    Can it not even touch the toilet seat? or just not allowed to actually drop in the bowl and come in contact with the waste water? so if i was to pull it fully out could it touch the toilet seat but not touch water would that mean its o.k ?
     
  5. mattysupra

    mattysupra

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    Relooking at diagram i think i can answer that myself, so clear of over fill , so technically it can just about touch seat - 2-3mm ?
     
  6. Madrab

    Madrab

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    For maximum prevention, I'd have it well clear of the seat, 20-30mm.

    As suggested though, has the much more likely CAT3 risk also been catered for?
     
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  8. Take a look at the diagram and you'll see that no part of the hose or head is permitted beyond the dotted circle marking the boundary of fluid category 5 - an air gap AUK3 is provided by the distance between the head and the rim (overspill) level of the WC pan

    Technically "shall not be less than 20mm or twice the diameter of the of the inlet pipe to the fitting whichever is the greater"

    All assuming that your shower is mains fed


    https://www.wras.co.uk/consumers/resources/interpretations_and_advice/backflow_prevention/b20/
     
  9. mattysupra

    mattysupra

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    Hi, CAT3 risk ? No idea. Its a new build and they said they cant lengthen the shower bit . They did say as its been signed off i can do what i want personally. (the pipe is wrapped around bath leg so will be easy to to unwrap and make longer. But if its regs i want to stick to regs. Not change something so it no longer passes. Regs are there for a reason. Over kill most of the time but i fully understand that the regs are here to protect us from stupid people.
     
  10. Steelmasons

    Steelmasons

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    Get a longer hose fitted..;)
     
  11. DaveHerns

    DaveHerns

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    Does a muslim shower comply with these requirements?
     
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  12. Tay7

    Tay7

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    Just stick a longer hose on the blooming thing and be done with it.

    Obviously the original installers hands are tied and quite rightly so, but as the householder just dont bidet your ass with it.
     
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    DIYnot Local

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