Low Water Supply Pumps for showers, bathrooms and kitchens

Low Water Supply Pumps for showers, bathrooms and kitchens

When you have low water pressure, you can boost the water flow and pressure by installing a Shower Pump. These pumps can be used for mixer showers, kitchens, standard baths, showers and basins, to boost hot and cold water. In London, the water pressure is a common problem in most buildings.

Contact us for shower pumps installation.

Old Central Heating, boilers,plumbing and drains systems

Old Central Heating, boilers plumbing and drains systems in London, UK

old central heating, boilers, plumbing drains system

The Water Supply to a property

There are two ways the water supply is feeding a house or a flat in London.
1. The direct system – where all cold water in the house comes from the main street water supply.The direct system means that water from any tap is fresh water and drinkable.

In old properties, the water supply pipe is made of lead, and it should be changed to plastic pipes, for health and practical reasons. The new pipe colour code for water pipes is blue and will deliver a larger amount of water supply at higher pressure. If there is a water meter in the street, the pipe length that runs from the water meter into the dwelling, is the property of the homeowner.
mains water supply

2. The tank system, where only the kitchen tap is fed from the mains and the rest of the taps and appliances are fed from a storage tank, usually located in the loft. The tank can be made of plastic or metal.
Because the water is stored into the tank, only the water from the kitchen tap is potable (Safe to drink; drinkable)

An advantage for the tank system, especially if there is a low water pressure supply, is that you can flush the toilet, etc and have a constant water pressure supply.
water tank

StopCocks, Taps, Drain Cock and Valves

There should be two main water supply stop valves – or stopcocks in every property. One is located outside, in the street – front of the property and located in the pavement, with a metal or plastic cover. The second one is located inside the property, most of the time can be found in the kitchen, under the sink or under the staircase. These stopcocks are installed to allow a plumber or homeowner to turn off the water supply, when there is water leak or maintenance to be done to the plumbing system.
The cold water tank in the loft also has two valves. One valve for the cold water supply to the bathroom taps, garden taps, etc, except the kitchen sink and one valve for the hot water tank supply water pipe.
hot water tank
Drain cocks or Drain Valves, can be found at the bottom of the hot water tank. To empty a hot water tank you need a hosepipe, attached to the drain valve. To empty the Central Heating plumbing pipes and radiators, again,a hosepipe, attached to the drain valve which should be located at the lowest point in the plumbing system. To empty the cold water tank, turn off the mains and just open the cold water tap in the bathroom or garden tap.
drain cock valve radiator
To turn the water supply off for a kitchen sink, bathtub or bathroom basin, there should be two valves fitted on the supply pipes, one for the cold water and the other one for the hot water, located under the bathtub taps, basin,or sink.
valves bathroom plumbing

Boilers and Central Heating System

PUMPED SYSTEM – The water is circulated by a pump, through the Central Heating system. From the boiler to the radiators and back. The same water is reheated by the boiler, pushed by the pump through the Central Heating pipes to the radiators and back to the boiler to be reheated. There is a pipe for safety reasons, called Open Safety Vent Pipe to let built up steam and pressure escape if the boiler overheats itself. Motorised valves and thermostats are are used to control the heat. In the loft, there is small Feed and Expansion cistern.

GRAVITY CIRCULATION SYSTEM – The grandmother of Central Heating, a very simple system than only very experienced and very Qualified plumbers should attempt to tackle. It works on the principle of physics, hot water is lighter and expanding than cold water when is heated by the boiler, thous it goes up the pipe work. Less mechanical parts than can break down, but larger pipes are needed instead of the 22mm and 15mm diameter pipes used as standard in Central Heating. There is also a saying among the plumbers : These types of boiler don’t like to be moved because the gravity system works better when the hot water tank ( cylinder ) is right on top of the boiler to work at its best.

This types of Central Heating is more modern, very unlikely to find them in older properties. Megaflo system is a very popular choice when a large amount of hot water is needed, dwellings with more than one bathroom, underfloor heating, etc.
boiler water tank closed pressure vessel

Drains pipes, waste systems

There are two systems of drainage that you need to think about: ’foul‘ and ‘surface water’. In general, these two systems should be kept separate.

Each of these has above-ground and underground elements.

Foul drainage carries the used water from toilets, sinks, basins, baths, showers, bidets, dishwashers and washing machines. The above-ground pipework is referred to as sanitary pipework; the underground pipework is referred to as foul drains and foul sewers.

Surface water drainage carries rainwater (and melted snow and ice) from hard surfaces. The above-ground system of gutters and rainwater pipes is referred to as roof drainage; the underground pipework is referred to as surface water drains and surface water sewers.

Plumber in Kensington and Chelsea, Plumbers

Plumbers in Kensington and Chelsea, London

Robuild London Plumbers cover Kensington and Chelsea, Central and West London area. We also offer Building, Electrical, Painting & Decorating, Carpentry, Roofing and Refurbishments services in Kensington & Chelsea. Our Plumbers DO NOT charge by the hour or minute,for plumbing jobs, unless necessary. The plumbers are Gas Safe registered engineers and will always try and give a fixed price for the plumbing job, unlike other Plumbing and Central Heating companies.

Our plumbers run a Plumbing Merchant Shop, based in Acton, West London. This means that we can get plumbing materials and parts, faster and cheaper than most plumbers. From full bathroom suites, boilers, radiators, underfloor heating to designer bathroom fixtures.
Plumbing Merchant Shop in Acton, West London

Full Bathroom Refurbishments, Kitchen Refurbishments, Underfloor Heating, Showers, Wet Rooms, Wet Floors, Central Heating Problems, Cold water storage cistern repairs and replacement, Central Heating Installation, Central Heating Service and Repairs, Boiler Breakdowns, Gas Safety Inspections, New Boiler Installations, Boiler Upgrades, Megaflo Central Heating Systems, Hot water cylinder replacements, Combi Conversions,Immersion heater replacements, Radiators, Tanks,Thermostats, Unvented hot water system repairs, Fault Finding, Showers repaired or replaced, Shower pumps, Water Pumps, Water Softeners, Water Filters and other Plumbing Services.

shower London

Cast-iron Piping: Old and New

Cast-iron Piping: Old and New

Because of its durability, cast iron has for a long time been the most popular material for drain, soil and vent pipes, but it is also the most difficult to install because of its weight and the difficulty of joining it . The conventional type, still in wide use, is connected with spigot and socket joints, which must be sealed with molten lead and a rope like material called yarn. Plain-ended pipe is easily joined with
mechanical couplings. It can be inserted into an existing system of spigot and socket pipe to replace a damaged section or to add a new one. Leaks at socket joints can often be stopped by using a sealant.
cast iron waste pipes

Three grades of cast-iron pipe are available : medium, heavy and extra heavy. Ask the plumbers’ merchant for the weight allowed by your local authority. All grades can be cut either with a saw and chisel or with a special cutting tool. Proper support is more important with cast-iron pipe more than any other type, both because of its weight and because the mechanical joints are slightly flexible. Use pipe straps or special clamps.

Cast Iron piping is sometimes required in London – Listed Building or Conservation Areas. Most plumbers in London will rather use plastic waste pipes.

Cutting Cast-iron Piping

Two ways of working. The easiest way to cut cast iron pipe is with a link pipe cutter,usually available from tool-hire firms.
pipe cutter

If the pipe is already in position, there may not be enough space to cutting any other way. Wrap the chain section of the tool round the pipe, hook it on to the body of the tool, tighten the knob and work the handle back and forth until the pipe snaps. Cast-iron pipe can also be cut with a hacksaw and chisel. Mark the circumference of the pipe where you wish to sever it , then support the pipe on a block of wood or a sandbag. With a hacksaw, cut a 2 mm deep groove round the pipe at the mark, then tap round the groove with a hammer and chisel until the pieces separate.

Cast Iron Plumbers in London

Central Heating Finchley Plumbers in Finchley

Central Heating Finchley Plumbers in Finchley

London plumbers Robuild, offer a complete plumbing service in Finchley area for all your plumbing needs. Central Heating, Boilers repairs and installation, Underfloor Heating, Mobility bathrooms, Bathrooms, Kitchens, Showers, Wet Rooms,Gas appliances, new bathrooms, Megaflow Plumbing System,Combination boilers, Boiler servicing.
plumbers finchley

Our plumbers are Gas Safe registered ( also known as Corgi ) We also cover Woodside Park area. Our builders, painters & decorators, electricians, gardeners and carpenters cover North London and Finchley – Woodside Park area.

Plumbers in Finchley, London

Plumbing pipes

Plumbing pipes

When lead and steel pipes went out of fashion and copper and plastic came in, it became possible for householders to tackle simple alterations and repairs to the domestic water supply. For plastic tubing there is only one technique to learn: how to join tubes. Plastic won’t bend far with safety, so any bends are best made by using angle fittings . For copper tube you need to learn how to make joints and how to bend tubes. All the techniques are simple, but it’s best to order an extra length of tube and an extra fitting or two and practise before you tackle the real thing.

Copper tubing and how to bend it into shape

If copper tube is bent more than a small amount it will become oval in section and eventually flatten completely. To avoid this, plumbers use bending springs or bending machines which keep the tube section round. Bending machines are
not worth buying, but you can hire them. Springs can be bought or hired; they are steel spirals about 2ft. long. The easiest kind to use fits round the outside of the tube – it’s easier to slip on to the correct position and take off again after bending. Internal springs which slip inside the tube are more commonly available.

copper pipes plumbing

With the spring in place you simply grip the two ends of the tube, set your knee against the place to be bent, and pull. With the tube bent, internal springs tend to jam inside. If the bend is at the end of a tube, so that part of the spring is sticking out, slip a screwdriver into the ring on the spring end, twist to wind up the spring a little and the spring will slip out.
If the bend is in the middle of a long tube you’ll have to fasten the spring ring to a strong wire, measure carefully and mark the wire so that you can slide it in to the right position. Bend the tube a little further than you need, then straighten it a little to release the bending spring.

Copper tube bends easily; thicker tubes can be bent by fitting into a hole bored in a piece of timber; press down on the ends.
For smaller tubes, it is enough to hold ends of tube in each hand and bend tube over your knee. Section to be bent must be protected by bending spring or it will flatten and finally collapse.

Bending machines, usually on hand held or on a portable stand, can be hired, make tube-bending easy. The tube is held in a groove so it can’t flatten while being bent.
bending copper pipes plumber

Copper or plastic pipes full water are heavy and will sag not supported by fittings.

Plastic pipes: for waste, hot and cold water only

Plastic pipes are for hot water, cold water and waste pipes only. They can be bent cold; the manufacturers supply instructions for bending after heating them, but it’s best, where possible, to use the various angle fittings.
Water supply pipes are joined with solvent cement after cleaning the inside of the fitting and outside the end of the pipe with special cleaning fluid. Buy both when you buy the pipes and fittings. The tube ends must be cut square; use a fine-toothed saw, and chamfer the end with a file. After cleaning, paint outside of tube and inside of fitting
with solvent cement, and immediately push pipe into fitting and allow to set. (Work fast or cement will dry before you’ve made the joint.) Wipe off the surplus cement, and wash out the brush immediately in the cleaning fluid. Bigger pipes for waste systems can be joined in the same way, or they can be joined with simple push-on fittings. These have rubber rings inside which grip the outside of the pipes. Cut pipes square, chamfer the ends
Wipe the outside of the pipe with liquid soap. Check that the rubber inserts are seated correctly in their recess in the fitting. Push the pipe home carefully so that it doesn’t displace the rubber ring. Plastic pipes should be kept an inch or so clear of hot pipes if they are running side by side; if they must be close, they should have insulation between them.

Solvent-cement jointing for plastic waste water pipes or for plastic waste pipes. For plastic waste pipes only: pipes push into expansion fittings where rubber inserts seal the joints.

Push Fit pipes and fittings , also called Polypipe or Speedfit are easiest way to work with pipes. DO NOT USE THEM FOR GAS.
plastic pipes underfloor heating
You need a plastic pipe cutter, 15mm and 22mm and when you connect them, make sure you don’t damage the internal rubber ring from the fittings. It is used for underfloor heating installations.
underfloor heating plastic pipes
Professional plumbers and architects, sometimes avoid using the Polypipes pipes in favour for the more traditional and proved to last longer: copper pipes.
plastic pipes push fit polypipe speedfit manifold underfloor heating

Capillary fittings: the neatest joints

Capillary fittings make the neatest joints and are the only ones for fitting underground which we’d recommend an
amateur to tackle. The design is such that even if you aren’t good at soldering you’ll be able to make a sound joint. There are two kinds of capillary fittings; those where you must add solder and those, easiest for amateur use, which have a ring of solder already fitted inside as an integral part of the fitting.

Cut the ends square of the two tubes to be joined (use a finetoothed hacksaw or miniature hacksaw) and file off any roughness (use a round file for inside).
Thoroughly clean inside of fitting and outside of tube with glasspaper, plumber’s steel wool or the special cleaning tools.
Put flux on outside of tubes and inside of fitting. Push tube into fitting as far as the built-in stop.
Scratch tube with nail at joints to be sure solder grips well. Play the flame of blow-lamp on fitting; solder will melt and creep up the narrow space between tube and fitting (by capillary attraction, hence the name) until you see a bright ring of solder all round the joint.

Compression joints are the simplest for copper

Compression joints are the simplest for joining copper tube; there’s no heating or soldering and the only tools needed
are a hacksaw, file and spanners.
compresion valves joints 15mm
Cut square the ends of tubes and file off any roughness (use a round file to smooth the inside). Slide the nut on the tube, then the compression ring. Push tube into the fitting making sure it reaches the stop ridge inside. Then push the ring into the mouth of the fitting, and tighten as far as you can with your fingers. Use a spanner to give nut another quarter or half turn. Don’t over tighten or the joint may leak. This kind of joint is called non-manipulative; make sure you get the right kind of fittings. There’s a similar looking manipulative joint,which needs a special tool to widen tube ends before joining – not quite so easy for amateurs.
If a joint leaks, tighten a little more with spanner; if that doesn’t cure it, remake the joint with a new compression ring.


If your existing plumbing is in lead, you’ll have to pay a plumber to make a lead-to copper joint, and you pick up the job from there. He’s likely to charge you fairly steeply, to make up for this work he’s losing, but you’ll still save money in the end. If your plumbing is in steel tube, unscrew a convenient joint and fit a steel-to copper adapter or T-piece. You can buy these adapters from a plumber’s merchant; buy some PTF tape as well, wrap the steel
thread with the tape, then screw on the adapter and from there on you can work in copper tube. Similar adapters are made for steel to-plastic, permitted only for cold water, hot water and waste pipes.

London Plumbers

Acton Plumbers in West London

Acton Plumbers in West London, Plumbers based in Acton, West London

If you need a plumber in West London, Robuild London Plumbers has a plumbing team based in Acton , W3, West London. The plumbers shop – Plumbing Merchant Shop in Acton is also available if you need bathroom suits, showers, furniture, boilers and plumbing parts. Contact us for a free quote for your plumbing project. Our plumbers are Gas Safe Registered and Plumbing Engineers.
Central Heating
Boiler repairs
Boiler replacement
Boiler & Gas Certificates
Landlord certificates
Underfloor Heating
plumbers in acton, west London, plumbing shop

Which boiler for houses and flats you need

Boilers for Flats, Boilers for Bungalow, Boilers for Terraced House, Boilers for Semi-detached House, Boilers for Detached House, Boilers for Large House

London Plumbers Robuild can offer you a guide on getting a new boiler installed or boiler replacement. To be on the safe side, always consult a qualified plumber, Gas Safe Registered plumber or Contact Us, before buying a boiler. It happens very often that our plumbers have to deal with boilers that are too big or too small for the property. Size and power of the boiler does matter, its always better to have a more powerful boiler for a smaller property if you don’t mind spending extra on energy and gas bills. ( Or if you don’t believe in Climate Change ). Robuild Plumbers will always try to recommend the right boiler for you, rather than the most powerful boiler.
boiler installer

IT IS VERY IMPORTANT TO HAVE GOOD WATER PRESSURE to your Flat,Bungalow,Terraced House,Semidetached House,Detached House or Large House. If you have poor water pressure – low water pressure, your options for a Central Heating System Boiler are reduced to a System Boiler, Regular Boilers or Traditional Boilers. OR YOU YOU HAVE TO UPGRADE THE MAINS WATER SUPPLY.

For upgrading the mains water supply or pipe, you need to contact your Water Supplier. From the water meter in the street, a new and bigger pipe will be laid by the plumbers, back into your property. Old pipes are made of lead, unhealthy and should be avoided, upgrading the mains water pipe, means changing to plastic pipes PVC (poly pipes,polybutylene piping). Your Water Supplier will book a date , usually it takes few weeks,and will charge for the service. The processes of changing or upgrading the water supply pipe, looks more or less, like in the picture below.

upgrading mains water supply water pipe

All new boiler installation or boiler replacements requires the boiler to be in the vicinity of an external wall for the gas flue and a 22 millimetre diameter copper pipe for the gas supply pipe. Sometimes the boiler flue can be installed through the roof.
flat roof boiler flue

If the boiler location is relatively far from an external wall or roof, inspection chambers needs to be built if the boiler flue pipe is boxed in. However, there is limit for the length of the Boiler Flue Pipe.

Boiler Flue
boiler flue

Boilers for Flats

Flats are in general made of one bedroom, two bedrooms , three bedrooms – one kitchen and one bathroom. Some might have one family bathroom fitted with a bathtub and a second bathroom fitted with a toilet WC, basin and sometimes a shower (an electric shower)
combi boiler

The Hot Water and Heat Energy (Calorie) needs for a flat is considered to be of a low requirement. This means a COMBI BOILER ,or COMBINATION BOILER should be the right boiler for a small flat. It is energy efficient and takes a lot less space than a conventional boiler system with hot water tanks, cylinders and cold water reservoirs.

Hot water tank
hot water tank

Boilers for Bungalows

The same rules applies as for Flats.

Cold water tank reservoir in the loft
cold water tank

Boilers for Houses

If you have two or more bathrooms, then a Megaflo (megaflow) plumbing system should be right for your property. A MEGAFLO plumbing system is not the boiler itself, it is the unvented hot water tanks that makes the central heating into a megaflo central heating system. The more hot water tanks or bigger hot water tanks you have, it means more hot water available to your bathrooms. If you have to fill two or more bathtubs at the same time, someone taking a shower and the kitchen tap running, you will need a powerful boiler and a megaflo plumbing system to cope with the hot water demands for the property. Just keep in mind that megaflo hot water tanks can take lots of space.

What you see in the picture below is : The boiler, The Megaflo (wrongly written sometimes Megaflow) hot water tanks and a Water Filter.
megaflow boiler water filter

In the picture below, just a small Megaflo hot water tank unvented central heating system
megaflo hot water tank

If you want to save space, you can install a High Flow boiler. For this you need a decent Mains Water Pressure to work, but its the size of a washing machine and there is not need for water tanks. Because of the weight, the boilers are floor standing, but a good builder can install some solid brackets if necessary to support the weight of the boiler.

Highflow boiler
highflow boiler

Always ask a Professional Plumber or Contact Us before purchasing a boiler from a plumbing shop in order to make sure your Boiler provides the right amount of hot water output. The Plumber or Plumbers must be Gas Safe Registered Plumbers and Plumbing Engineers.

D.I.Y Home Plumbing

Some home owners fix the plumbing in their homes as matter of routine,especially if its just a dripping tap. The plumbing generally is left to the plumbers.Due to the cost, a whole list of tasks once the domain of professionals plumbers, like replacing old waste pipes, fixtures, cleaning a blocked waste trap and changing taps, extending pipes or relocated bathroom units, installing a dish washer -washing machine or a garden tap, this type of plumbing can be done by amateur plumbers. DIY websites can offer a large amount of information for the wanna be plumber. Picture galleries also helps identifying parts from the plumbing system. Do-it-yourself plumbing is however restricted to what is generally perceived as safe plumbing jobs. Under no circumstances, a DIY plumber should attempt installing a Boiler, Central Heating and work with Gas appliances like kitchen hobs and kitchen owen.Only qualified plumbing engineers who are Gas Safe Registered can do that, for safety reasons.

London plumbers

Water Underfloor Heating Installation

Underfloor Heating Installation

Doing away with radiators is not a luxury anymore, underfloor heating is becoming the norm in London. More than 10 years ago, underfloor heating used to be installed in bathrooms and kitchens, nowadays, it is installed for the whole property, house or flats, bedrooms, living rooms, hallways, no matter the size or types of flooring. Underfloor heating can be installed under carpets, floor tiles, wooden flooring, etc.
underfloor heating installers plumbers london

With proper insulation and if installed correctly, it can be energy efficient too. Having underfloor heating will give you more space and a better interior design, plus, the heating is dispersed in an uniformed way, no more too hot or too cold room temperatures. The underfloor heating can also be appreciated when walking barefooted on the floors.

underfloor heating insulation

The underfloor heating can be controlled by thermostats and programmers, each room independently from each other if needed.The plumbers will explain to you how it works and how many zones you need for a house or a flat.
Underfloor, heating , thermostat, controller, programmer, central heating

Manifolds will need to be installed too, depending on how many zones are you going to have. The heat output (BTU) is calculated by the manufactures, using special software.
Underfloor heating manifolds

The boiler needs to be adapted and sometimes changed if its not powerful enough. Our London Plumbers will give free advice regarding your Central Heating.

Underfloor Heating Installers in London