Common Mistakes When Buying a Shower — and How to Avoid Them
It is easy to fall for a shower's appearance and discover too late that the water system, valve, outlets or bathroom layout will not support the result you imagined. A little checking before ordering can prevent costly changes during installation and a disappointing shower afterwards.
This Allbits Shower Guide brings the most common buying mistakes together in one practical checklist. If you are starting from scratch, read our Complete Guide to Choosing a Shower first, then use the points below to check your shortlist.
1. Choosing a shower before identifying the water system
An electric shower heats incoming cold water inside the unit. A mixer shower blends the property's hot and cold supplies. They have different installation needs and performance limits; a power shower and a shower pump are different again. The right product depends on the actual supply in your home, not just the bathroom style you like.
Avoid the mistake: Establish whether you have a combi boiler, unvented hot-water cylinder, gravity-fed storage system or another setup. Ask your installer to confirm the supply and identify which shower types and specific models are suitable. Our Electric vs Mixer Showers guide explains the main trade-offs.
2. Looking only at the pressure number
The minimum pressure on a product page is a useful compatibility check, but it does not tell the whole story. Pressure is the force of the supply; flow is the volume of water it can actually deliver. A broad head or several outlets can feel weak when the available flow is inadequate, even if a nominal pressure requirement is met. Running conditions matter more than an isolated static reading. Explore our Shower Water Pressure and Flow Explained
Avoid the mistake: Have the installer assess running pressure and flow at the proposed shower, then compare the figures with the complete shower specification, including the valve, head and any second outlet. Consider what happens when another tap or appliance is used. Explore our Shower Guide for more advice on water pressure and flow.
3. Assuming a larger head gives a stronger shower
An oversized rainfall head may look luxurious, but it spreads the available water across a wider area. It cannot increase the home's supply. Likewise, a handset's spray setting can change the feel of the water without increasing the underlying pressure.
Avoid the mistake: Choose head size with the measured flow, preferred spray sensation and physical space in mind. Think about where the water lands, whether a handset would be useful, and how the head will be mounted. Browse Allbits shower heads alongside the specifications. Explore our How to Choose a Shower Head
4. Confusing thermostatic control with stronger water pressure
A thermostatic valve adjusts the hot and cold mix to help maintain the selected temperature as supply conditions change. It does not boost water pressure. Safety features such as a temperature stop, cool-touch surfaces or a response to supply failure depend on the individual product and its correct installation.
Avoid the mistake: Decide separately whether you want thermostatic temperature control and whether your water supply can deliver the flow you want. Compare the actual model's features with a manual alternative. You can explore manual showers and shower valves. Explore our Thermostatic vs Manual Shower
5. Ordering the wrong number of outlets
One shower head needs one suitable outlet. Add a handset, bath filler or body jets and you may need a valve with the appropriate outlets or a compatible diverter. The number of controls on the front does not by itself tell you how many outlets the valve supports or whether they can run simultaneously.
Avoid the mistake: Sketch every water outlet you want and decide whether you need to switch between them or operate any together. Check the valve's specification, plumbing arrangement and available flow with the installer before buying. A complete shower set can make component selection easier, but still check exactly what is supplied.
6. Forgetting the parts needed to finish the installation
A product labelled “shower head” may be only the head. A concealed valve might need a separate head, arm, handset, outlet elbow, hose or compatible trim; some components may be included with a set and others sold separately. Concealed installation also affects what can be accessed later for maintenance.
Avoid the mistake: Read the “what is included” section and make a complete parts list with your installer. Check pipe connections, mounting, valve depth, access, compatible fittings and finish. Browse shower accessories and shower arms for the finishing pieces.
7. Measuring the room but not the shower's working space
The head, handset and controls must work within the actual enclosure or bath screen. A fixed head positioned too near a door can spray water outside; a handset rail mounted at the wrong height is awkward to reach. With a shower tower or column, a flat mounting area, wall space and projection may be important.
Avoid the mistake: Mark the proposed positions on the wall before committing. Check headroom, arm projection, reach to controls, door movement, cleaning access and where water will land. For a tower, see our Shower Towers and Columns Buying Guide. If the enclosure is also changing, use the Shower Enclosure Guide to plan the space as a whole.
8. Treating an electric shower swap as automatically straightforward
Replacing an electric shower may involve more than matching the shape on the wall. The electrical circuit, cable, protective device, water supply, pressure and flow, and the replacement unit's requirements all matter. A different power rating is not automatically suitable for the existing installation. Even changing a head or hose should follow the manufacturer's compatibility instructions.
Avoid the mistake: Have a qualified installer assess the existing installation and the new model's instructions before ordering. Do not buy a higher-rated unit on the assumption that it will simply produce a stronger shower.
9. Expecting every shower tower or multi-outlet system to work with any supply
Shower columns can look like a simple way to add a rainfall head, handset and body jets, yet these features may place greater demands on pressure and flow. Different models also have different minimum operating requirements and switching arrangements.
Avoid the mistake: Read the individual product specification. Check how the outlets work, which can operate together, the hot-water capacity and the wall space. Compare Allbits Shower Towers & Columns only after confirming the supply can support the chosen model.
10. Buying by appearance alone
A matching finish matters, but so do day-to-day cleaning, spare parts, reach, adjustability and suitability for everyone using the shower. Matt black, chrome and brass-effect finishes may need different care, while limescale can affect nozzles and spray quality. A fixed head alone may be less convenient than a handset in a family bathroom.
Avoid the mistake: Ask who will use the shower and how. Decide whether a handset, adjustable rail, temperature control and easy-clean nozzles would make life easier. Check the manufacturer's care guidance for the exact finish. A practical shower can still be a beautiful one.
The five-minute shower buying checklist
Before you place the order, make sure you can answer these questions:
- What water and hot-water system is installed, and what type of shower suits it?
- What are the running pressure and flow at the proposed position?
- Which exact outlets do you want, and must any work together?
- Does the chosen valve and shower head meet those requirements?
- Will the head, handset, controls and spray fit the enclosure or bath area?
- Which fittings are included, and what must be purchased separately?
- Has the installer checked the electrical and plumbing requirements?
- Can everyone in the household reach, use and clean the shower comfortably?
If any answer is uncertain, pause the order and check the model's instructions or ask your installer. It is much easier to adjust the plan now than to alter finished tiling later.
Frequently asked questions
Can a new shower head fix low water pressure?
It may change how the spray feels or restore performance if an old head is blocked, but it cannot increase the pressure available from the plumbing. Diagnose the supply and flow before buying a larger head.
Is a thermostatic shower always suitable for a family bathroom?
Thermostatic control can help keep the selected temperature steadier, but suitability and specific safety features vary by model and installation. Check the product's temperature stop, shut-off behaviour and water-system compatibility.
Can two shower heads run at once?
Only if the valve and pipework are designed for simultaneous use and the system can deliver enough water. A dual outlet shower may instead switch between outlets.
Do I need a plumber before buying a mixer shower?
An installer's assessment is sensible if the water system, supply performance, concealed pipework or outlet plan is uncertain. An electric shower also needs the relevant electrical installation checked by a qualified professional.
What should I bring to Allbits for advice?
Photos of the existing shower, its make and model if known, details of your boiler or cylinder, measurements of the space, and any installer-confirmed pressure or flow information will help narrow the options.
Choose with confidence at Allbits
Explore the full range of Allbits showers, shower sets, valves and accessories. If you are unsure how the pieces fit together, contact Allbits with your measurements and water-system details before you order.