Introduction to biomechanics


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An in Depth Home Improvement Article on Everything in the Bathroom (part 1)

Tips and advise when buying your bathroomare  now  fitted  in  most  new  toilets.
suite: (part 1)POTTERY:Also known as sanitary
ware,  ceramics,  porcelain  and  ware.The dump valve works by means of a push
button, either a single or a double one. As
There are four basic areas that affect theyou press the button it lifts a valve that
quality of pottery and its expected lifespan:instantly releases all the water down through
the  toilet.
The  depth  of  the  glaze:This makes this type of flushing mechanism
very effective with low levels of
The glaze is the glass-like surface coatingwater.Overflows:Most old types of toilet have
which is fired onto the pottery in the kilnan overflow which let the water flow outside
when  it  is  made.the property if the ball valve mechanism
fails. This is called a visible overflow.Most
The glass enables the pot to be waterproofnew types of toilet have an overflow which
and protects it from chemicals, such asflows back into the toilet bowl if the ball
bleach  etc,  over  its  life.valve fails. This makes them easier to
install. This is called an internal
The thicker the glaze generally the longeroverflow.BASINS (sinks)Basins are often
the life. Once this glaze goes, wears out,referred to as sinks. This is incorrect.
the pot becomes porous, absorbs water andSinks are fitted in kitchens and basins are
eventually  cracks.fitted in cloakrooms, bathrooms and
ensuites.The term basin came from the use of
The more you use and clean the pottery thea jug and basin in the days when these were
faster  the  glaze  wears  out.used to wash yourself in the bedroom. There
are six main type of basin available in the
To make the glaze thicker you have to applyUK.These are basin and full pedestal, basin
it a layer at a time and each time fire it inand semi-pedestal, cloakroom, semi-recessed,
the kiln. This process results in breakagescounter top and under-slung.Basin and full
within the kiln.For example, if I fire 100pedestal:This where the basin sits on full
pieces of pot once I may get 99 back in onesize pedestal and is the most common type in
piece,  so  the  99  pays  for  the  100.the UK. Normally the waste pipe and hot and
cold water pipes run through the pedestal and
If I then fire the 99 again I may get 80into the floor.Basin and semi-pedestal:This
back in one piece, so now 80 have to pay foris where the basin sits on a half height
100.pedestal which does not reach the floor. They
are very common in Europe and becoming
If I then fire the 80 I may get only 50 backincreasingly popular in the UK.When
in one piece, so now 50 have to pay for 100.recommending this type of unit care should be
You  get  the  gist  of  this  by  now.taken to ensure that you have the type of
pipe work arrangement necessary to install
If you assume that each layer of glaze laststhe basin. Please consult your local plumber
approximately 5 to 7 years you can soon seeor bathrooms installer for more
how  the  system  works.advice.Cloakroom:These are usually fitted
without a pedestal, as they are normally very
If you glaze once you get a less expensivesmall basins. There are some available with
cost to manufacture but the product does notpedestals but you are best to check first.
last as long in a house. The thicker theWall hung basins are normally fitted with a
glaze the longer the pottery lasts.Quality ofdecorative bottle trap.Semi-recessedThis type
the clay:The quality of the clay that is usedof basin has a bow in the front but the
to  make  the  pottery  is  very important.underside has been cut away to produce a flat
area. This is because this type of basin is
The reason for this is that the finer theusually fitted into a worktop.Counter top:
clay the smoother the finish will be on the
item  being  made.
This type of basin is either round or oval
If you use a poorer grade of clay it willand fits into a hole cut into a worktop.Under
have more grit in it and the surface willslungThe type of basin is fitted under the
have  a  more  rippled  appearance.hole in the worktop. This means that the
worktop has to be a solid surface material,
You may also find that because of thesuch a marble or stone.TAP HOLES: Basins
increased grit content the pottery is heaviercome with one, two or three tap holes.One tap
than an item of the same size made with ahole:This type of basin uses a mono bloc
finer  grade  of  clay.mixer, which normally incorporates a pop-up
waste. The water is controlled either by a
The finer the clay the more tonnes of roughlever on the tap or a separate hot and cold
clay you have to use to refine down to makehandle on either side of the spout.Two tap
it.hole:The most common type of tap
configuration has a separate hot and cold tap
It is therefore less expensive to producewith a plug and chain waste. The hot tap is
pottery with a coarse grade of clay.Thenormally fitted on the left hand side of the
overspray or colour: The white colour, orbasin.Three tap hole:There are two type of
whatever colour it happens to be, is appliedtap arrangement that can be fitted to this
to  the  pottery  before  the  glaze.type of tap-hole arrangement. Either a
three-hole mixer which is a hot and cold
Each manufacturer mixes their own colour tovalve head and a separate spout, usually
try to match it to the colour of the acrylicfitted  with  a  pop  up  waste.
baths.
Or you could fit a pair of basin taps and
The white colour of the acrylic bath is awhat is known as a chain stay waste. A chain
worldwide standard set by the acrylicstay waste uses a plug and chain but the
manufacturers.chain is held in place by a disc, which is
fitted into the middle of the three
You need to be aware of this if you clientholesBIDETS:Bidets are not that common in the
tries to mix and match pottery from differentUK as we are not normally raised to use them.
manufacturers.However for those that do have and use them
there are a few points to consider.For a
Its usually acceptable to have a toilet andbidet to work effectively they have to be
basin from one supplier made to match thefitted next to a toilet-not at the other side
bath  but  if  you  put  a  basinof the room or several feet away.A UK bidet
now come with the tap fitted on the top and
from one supplier and a toilet from anotheris usually a mono bloc mixer. There used to
and then the bath together it will stand outbe bidets in the UK, which came with an
like  a  sore  thumb.up-spray or fountain spray as it was known.
The thicker the colour is applied, the lessThis type of bidet is no longer
fading on the edges takes place and theavailable.BATHS:There are four main types of
colour  is even over the whole of the item.material used to manufacture baths in the UK.
These are cast iron, pressed-steel, glass
The colour as with the glaze is applied inreinforced plastic (GRP) and acrylic.Cast
layers and then has to be left to set beforeIron:This is the material from which most
the  next  coat  can  be  applied.baths used to be made and is now most
commonly used for free standing baths. There
The fewer coats the quicker the product canare two commonly held misconceptions
be made and the less cost is involved.Theconcerning cast iron baths.The first is that
design of the item:The more intricate thethey are too heavy. The weight of a standard
design the more expensive the mould is tocast iron bath filled with water is in the
make and the more chance there is that youregion of 25 stones. The bath is usually
will not always remove it from the mouldfitted with four legs which means that the
without  damage.weight on each leg on the floor is
approximately 6.25 stones.As we walk across
Plainer shapes are usually less expensive.the floor foot to foot we actually weight
You should also note that basins, toilets andmore  that  this.
bidets  are  made  as  matched  sets.
The second misconception is that they are
You will often find that the foot of thecold. This is because years ago when we all
pedestal on the basin matches the foot of theused cast iron baths the houses did not have
toilet pan and that the back of the basincentral heating. The bath can only reflect
matches the toilet cistern lid.One generalthe  temperature of the room that it is in.
point to be made is that pottery is often
sold in what is known in the trade as aIf the room is warm the bath is therefore
four-piece  set.warm. There is, however, one possible
exception. If the bath is fitted in with a
That is a basin, pedestal, pan and cistern.panel as apposed to free standing it may be
Unfortunately the retail customer sees thethat the air temperature under the bath is
set as two pieces: the basin and the toilet.cooler due to the holes left by the plumber.
If this is the case, insulation under the
bath will solve the problem.Pressed
If you use the term four-piece set to aSteel:This is where a layer of steel several
retail customer they may think you mean amillimetres thick is coated with a
basin,  toilet,  bath  and  bidet.stove-enamelled surface. They are most
commonly used in hotels and commercial
So always explain what you mean by fourpremises.As the material of the bath is very
pieces if you should choose to use thethin they tend to cool down very quickly.
term.PRODUCT TYPES:TOILETS & WC'S:There areThey also tend to be very plain in shape due
five types of toilets currently available into the manufacturing restrictions of the
the  UK.material.Glass Reinforced Plastic (GRP) :This
was the first type of plastic material used
These are Wall hung, Back-to-wall,to produce baths and was used by almost
Close-coupled, Low level and High level.Walleveryone  until  the  invention  of Acrylic.
hung:This type of toilet has the pan hanging
on the wall and the cistern concealed in theIt has very good insulation properties and
wall  behind  it.enables baths of many shapes and styles to be
easily produced.The two main difficulties
More common in mainland Europe, it haswith this material are as follows:1. As the
become increasingly popular over recent yearscolour for the bath is produced in batches
as  more  people  travel  abroad.there can sometimes be problems with the
match to the pottery.2. If the bath is fitted
You do however need to ensure that the panin direct sunlight they are prone to the
is supported properly when fitted either byplasticiser leaking out of the surface and
the use of special floor mounting brackets orcrazing of the surface texture
the use of a framework.These frameworks,occurring.Acrylic:This is the most common
which support the pan and provide a place formaterial now used to produce baths in the UK
the cistern, are available from severaland Europe. It has the same characteristics
suppliers.as GRP in that it insulates well and can
produce great shapes.However, as it is
This type of WC allows ease of cleaning andproduced to internationally agreed standards
as the pan is the only visible piece of potof colour it is now what every pottery
it minimises the impact of the WC on thesupplier uses to obtain their colour match.
design of the room.Back to wall:This type of
toilet is normally used mainly when havingAcrylic comes in several thicknesses most
fitted furniture. As with the wall hungcommonly 3mm, 5mm, 8mm and 10mm. There is a
toilet the cistern is concealed inside thecommon misconception that the thicker the
furniture but the pan is sat on theacrylic the stronger the bath.This is not so.
floor.Close coupled:This is the most commonThe acrylic is there only to hold the colour
type of toilet in the UK. This type of toiletand maintain a waterproof barrier. You will
has  the  pan  and cistern joined together.normally find that the thicker the acrylic
the plainer the style of the bath.The
It is often confused with the low levelstrength of the bath comes from the
toilet, so make sure you are clear that youglass-reinforced plastic, which is sprayed on
mean a toilet with the pan and cisternthe underside of the bath. You should always
physically joined together.The advantage oflook for a full encapsulated baseboard.This
this type is that the pan has a splash backis where the chipboard base that supports the
built onto it where it joins the cistern, sobottom of the bath is fully enclosed to
that when men and boys stand at the toiletprevent it from coming away after a few years
and  miss  there  is  not  so  much  mess.of  use.
Toilets are meant to be sat on not stoodThe sides of the bath should also be
against. If you want to stand up you shouldreinforced to prevent them from bowing out
buy a urinal. This toilet is easilywhen the bath is filled with water.If the
maintained and is therefore ideal forbath does bow out in the middle the result is
downstairs cloakrooms and main ensuites whereoften that the top ledge will drop producing
they are likely to get a lot of use.Lowa gap between the tiles and the bath.BATH
level:This type of toilet has a freestandingSIZES AND SHAPES:There are a multitude of
pan and the cistern sits approx 900mm orbath shapes and sizes available in the UK at
36inches up the wall with a short flush pipepresent but they break down into several
in between the two pieces.Before the adventgroups.Rectangular baths - Single Ended:This
of the close-coupled toilet this was the mostis the most common style of bath with the
common and is still what most people withtaps at one end and is ideal for one person
older  houses  have.to bathe in on there own as it usually has a
gentle back slope which offers good back
This is why they confuse them with the closesupport when relaxing.The most common size is
coupled. They are now most commonly sold with1700 x 700. They are however produced in
traditional bathrooms and have a chrome orsizes ranging from 1200 x 750 to 2000 x 1200.
gold flush pipe.The difficulty with this typeWhen a client comes in saying that there bath
is that if men or boys use them they are aptis 1680 x 680 this is usually because they do
to  miss  and  the  pipe  goes  green.not realize that the bath is fitted into the
plaster work when installed so that a bath
Once this happens there is nothing that canthat is 1700 x 700 straight out of the box is
be done to repair it. They are generallyoften small when fitted.Rectangular baths -
priced at 50% to 60% higher in price than aDouble Ended:This type of bath is common with
close coupled and are bought more for theirpeople who prefer to bathe with a partner as
aesthetic value than practicality.Highthe taps are mounted in the middle of the
Level:This type was popular in the Victorianbath. They are becoming a lot more popular in
era and is associated most closely withthe  UK.
bathrooms  of  that  period.
However to make extra room for the two
The pan is free standing and the cisternpeople the two back slopes on the bath can
sits on the wall approx 1800mm or 6 feet upoften be at quite a severe angle and
the wall with a chrome or gold flush pipe andtherefore make the bath less comfortable for
a  chain  pull  flush.one  person  to  lie  out.
It has the same disadvantages as the LowOnce again they come in a multitude of
level  when  used  by  men  and  boys.sizes, from 1700 x 750 to 2000 x 1200.Corner
baths:There are two mains types of corner
In terms of price, this type is normally 50%bath: equal sided and offset, where one side
to 60% more than the Low level. Sold mainlyis longer than the other. Two equal sided
for the aesthetic value, all toilets in thecorner baths are usually available 1100 x
UK now have to flush using 3 and 6 litres of1100, 1200 x 1200, 1300 x 1300, 1400 x 1400
water.and 1500 x 1500.The first three sizes are
more commonly used as shower baths as the
It makes no difference which type you buy,bathing area is too small for most people to
they all use this amount and as a consequenceuse effectively. The 1400 and 1500 are big
the high level and low level flush no betterenough  to  use by most people for bathing.
than the close coupled.TYPES OF FLUSHING
MECHANISMThere are two main types of flushingThe offset corner baths are usually
mechanisms: the syphon and the dumpavailable in two sizes 1500 x 900 and 1500 x
valve.Syphons:Syphons have been used for many1000. They are not very effective as a bath
years in the UK as the means of flushing thefor most people less than 5 feet 4 inches
toilet. They work with the use of a lever ortall  due  to  the  internal  length.
pull  chain.
They are available with or without a seat in
When this is pushed a small amount of waterthe corner.Shower Baths (Ophelia,
is forced over the syphon in the cistern,Ianthe):These baths have a larger area at one
which creates inertia that draws the rest ofend to allow for more room for showering.
the water along with it and flushes theThey are usually supplied with a bath screen
toilet.They are very effective with highmade especially for the shape of the
levels of water in the cistern but becomebath.Space Saver baths:These baths are made
less  efficient  as  the water level falls.to a special shape usually thinner at one end
to allow for more room to fit furniture or
In the past toilet cisterns originallymake more room for pottery or even a shower
contained 12 litres of water, then 9 litrescubicle.Written by Neal Baker on behalf of
and now 6 litres for a full flush and 3and
litres for a half flush .People who now have
a 6 litre flushing syphon type toilet often
complain that they have to flush the toilet
twice to get it to work.Dump valves:In recentonline retailers of bathroom furniture,
years dump valves were not allowed in the UK,bathroom suites and bathroom accessories in
but with the advent of new legislation theythe UK.



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