Plumbing

Bathroom Plumbing Cardiff

Need help with the plumbing in your new bathroom in Cardiff?

If so, simply get in touch with J&Z Bathroom Fitters Cardiff today to sort out your bathroom plumbing

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bathroom plumbing enquiry

Bathroom Plumbing


The J&Z bathroom plumbers provide a reliable and trustworthy service in all areas of bathroom plumbing. For bathroom installations and refurbishments our plumber's have all the necessary experience to suit your home projects. With many years servicing customers throughout the Cardiff area, you can trust that anythe J&Z Barhroom Fitters Cardiff plumbers do will be carried out with the highest attention to detail.

Bathroom installations are the focus and therefore the particular specialty of our plumbers. This includes things like fitting new baths, showers, taps, sink basins and more. As well as supplying all fixtures and fittings, they also able to provide professional advice on how best to design or upgrade a bathroom for your home in relation to sanitaryware and highlight any potential issues based on the location of particular items.

Our bathroom plumbers will carry out their work to minimise any disruption to the water and heating supply through the rest of your home providing minimal disruption allowing you to carry on with your daily lives as normal.

Bathroom Plumbers near me

If you are looking for bathroom plumbers near me and you live in or around Cardiff, contact us today to arrange a quote

Bathroom Plumbers Cardiff


Understanding the hot water system in a bathroom is important when selecting fittings, as it determines their compatibility. The gravity-fed system, which utilizes a storage tank or cistern in the loft to supply cold water and heat it through an immersion heater or heating coil using gravity, is the most common type of domestic hot water system. If the cistern is positioned high enough above the shower, adequate pressure should be created in this system.

An unvented hot water system does not have a cistern and instead relies on mains pressure. A cylinder is utilized to heat and store the cold water supplied by the pressurized main. It is recommended to consult with a qualified professional to confirm the compatibility of any fixtures or fittings in your bathroom.

To remove waste water from the bathroom, it needs to be connected to a larger pipe that leads to the main underground drainage system. Homes built after the mid-1960's should have a single soil stack, usually located near the downstairs bathroom. All waste from showers, baths, basins, and toilets on upper floors is directed to this stack. In older bathroom setups, there may be two pipes: one outside wall for soil waste (WC's) and a smaller pipe for non-soil liquid waste from baths or showers.

When replacing old fittings with new ones, it is crucial to ensure proper connection of all pipes to prevent sewage-related issues in the home. Our expert plumber will be able to understand all the appropriate replacements for your new bathroom. Where possible to keep coists down, new bathroom sanitaryware installations can be connected to existing systems through a tee junction fitting or directly onto the existing soil stack.

Plumbing in a Bathroom Shower


When selecting a shower for your home, the hot water system is a key consideration. If you have a combination boiler, you can opt for either electric showers or mixer showers. It's important to note that adding pressure to a combination boiler via a pump does not impact mixer showers.

For homes with a hot water storage cylinder, electric or mixer showers are still possible, but options like the power shower with pumped water provide higher performance. A mains cold-water supply is necessary for the pump to draw from. Boosted pressure from pumps on electric and power showers can significantly increase their flow rate, making them a viable choice even with a slower hot water supply.

Loft Bathroom Plumber


When planning a loft bathroom, it is important to take into consideration the plumbing layout. One of the first decisions you must make is whether or not you will be able to connect to an existing soil pipe from another floor. This can depend on where your new bathroom is located, and how easy access would be to the existing pipework. If this cannot be done, other options include flexible small bore waste pipes that can be branched off to outside drains, and a pumped unit with macerator which allows the bathroom to go anywhere in the loft. Additionally, hot and cold water supplies can often be branched easily from a bathroom on another level in the house.

The type of arrangement you choose will affect both your initial costs as well as ongoing maintenance costs, so we ensure that these essential aspects are discussed with you so that we can work out exactly what sort of setup suits your needs best and what the financial implications may be. Utilising the knowledge and experience of our plumber, having a loft bathroom can become an enjoyable reality!

Need help?

Frequently Asked Bathroom Plumbing Questions

  • What is the most difficult item to plumb in a bathroom?

    Rather than this being a single item, the difficulty level when installing an item in a bathroom can vary from project to project.

    The most challenging tasks include installing a bathtub or shower, especially when changing position. Rerouting pipes to accommodate new fixtures can become very difficult based on the construction of the floor and or the ceiling below, as the types of joists will vary from one property to another. All rerouting bathroom plumbing tasks require a high level of plumbing expertise and can involve significant floor and pipe removal and reconstruction work.

  • Does plumbing in a low flush toilet really make much difference?

    If your home is billed using a water meter, it will make a difference, as the average flush for a regular toilet uses around 10 litres of water. A low flush toilet uses around 5-6 litres per flush - almost half as much per flush! So switching to a low flush toilet will result in water conservation. However, proper plumbing is important to ensure that the toilet is functioning correctly, and this saving is maximised so you don't have to flush more than once to get the job done!

  • What affects the power of a shower and can your plumber do something about it??

    There can be several things which can impact the power of your shower.

    Power is ultimately a function of the flow of water, so restricted water flow through your showerhead or pipes leading to it could be one reason for weak water pressure and a lack of power. A pipe blockage or accumulation of minerals can decrease water pressure.

    The diameter of the pipe to your showerhead or the showerhead itself may be a cause. If you have inherited an existing shower, the previous owners may have decided to implement changes in these areas to reduce the amount of water used.

    If the location of your shower piping is a long distance from the water source, this will result in low water pressure since the water has further to travel and the pressure reduces over distance

    The specification of your water heater and the pump will greatly impact your shower's performance if you have a mains shower. Low-quality boilers or a boiler underspecified for the size of the property will lead to low water pressure.

    Our plumber can identify some of these issues and take correct measures but will discuss these with you as the cost and time to alter will vary greatly depending on what and where the main issue lies

  • Why choose J&Z Bathroom Fiiters Cardiff to plumb our bathroom?

    We have a wealth of experience plumbing in bathrooms - especially for a wetroom and for underfloor heating. As we can provide a complete service, choosing us to plumb in your sanitaryware and we can install wet underfloor heating makes absolute sense compared to jumping from one contractor to another, so why choose anyone else?

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