Updating a bathroom with new fixtures

Why fixtures are the smartest place to start

Retiling a bathroom is a big, dusty, week-long commitment. Replacing the fittings is a weekend job with a far better return on effort. The tiles stay put, the plumbing stays where it is, and the room still feels completely different when you walk in. New brassware, a modern shower, and a clean vanity unit can take a bathroom from dated to genuinely pleasant without a single tile being lifted.

The trick is to plan properly before you spend a penny, because most disappointment in bathroom projects comes from buying the wrong size or the wrong fitting and discovering it halfway through the job. If you take measurements carefully and think about how everything connects, this is very achievable DIY.

Measure, photograph and check compatibility first

Before you order anything, spend an evening with a tape measure, a notebook and your phone camera. Take photos of every connection point — under the basin, behind the toilet, at the shower valve — because you will refer to them constantly when you are standing in a shop or scrolling through a website.

• Basin taps: measure the distance between the tap holes, usually 180mm centre to centre on a standard basin, but not always. Check whether you need a monobloc mixer (one hole) or a pair of pillar taps (two holes).
• Water pressure: if you have a gravity-fed system with a tank in the loft, high-pressure mixers and large rain shower heads will disappoint you. A pump, or a low-pressure-compatible valve, is often the honest answer.
• Shower valve centres: standard is 150mm, but measure yours anyway. Replacing like with like saves an enormous amount of work.
• Waste sizes: basins usually take a 32mm waste, baths and showers 40mm. Buying the wrong one means a second trip out.
• Vanity units: check door swing, pipework position and whether the unit will clear the skirting or a radiator.

Also confirm that any new brassware is approved for use with UK water regulations, and buy fittings in the same thread standard as your existing pipework — nearly all domestic taps and valves use ½ inch BSP threads, which makes life much easier.

Swapping taps: the straightforward win

Taps are the single most visible change you can make. Turn off the water at the isolating valves or the stopcock, then open the taps to drain the pipework down. Have a towel and a small bowl ready — there is always more water in there than you expect.

Undo the flexible connectors or compression nuts underneath, lift the old tap out, clean the basin surface, and seat the new one on a fresh washer with a thin bead of silicone where the base meets the ceramic. Use two spanners when tightening compression joints: one to hold the fitting steady, one to turn the nut. Hand-tight plus a quarter turn is normally plenty. Over-tightening is the most common cause of weeping joints and cracked basins.

If your old pipework does not quite reach, a short length of flexible tap connector will bridge the gap neatly — just keep the bend gentle and avoid kinking.

Showers: easy upgrades and the ones worth doing properly

A new shower head and hose is a ten-minute job and instantly lifts the look of the room. Check the thread size, and consider a head with easy-clean rubber nozzles if you live in a hard water area.

Moving up, a thermostatic bar valve is a genuinely worthwhile upgrade. It keeps the temperature steady when someone runs a tap elsewhere in the house, which matters enormously in a busy household. Replacing an old mixer with a bar valve of the same 150mm centres is a surprisingly tidy job — the existing pipework usually lines up and the decorative covers hide the rest.

Wherever you fit a new shower, check the seal around the riser rail fixings and the valve. Water tracking behind a wall is the expensive kind of leak, and it rarely announces itself until the ceiling below stains.

Vanity units and basins

A vanity unit hides the pipework, adds storage and makes a small bathroom feel intentional rather than accidental. Wall-hung units look brilliant but need solid fixing into a stud or a suitable wall plug — never rely on plasterboard alone. Floor-standing units are more forgiving and easier to fit for a first-timer.

Offer the unit up before committing, mark the waste and supply positions, and cut neatly with a hole saw rather than hacking at it. Fit isolating valves on both hot and cold supplies while you have access. You will thank yourself the next time you need to change a washer.

Sealing properly — the part that decides whether it lasts

Good sealing is not glamorous, but it is the difference between a bathroom that still looks sharp in five years and one with black edges and damp patches.

• Remove every trace of old sealant with a scraper and silicone remover. New sealant will not stick to old.
• Clean the surfaces with an alcohol-based cleaner and let them dry fully.
• Run masking tape along both edges of the joint for a crisp line.
• Use a mid- or neutral-cure sanitary silicone with mould inhibitor, and smooth it in one continuous pass with a silicone tool or a wetted finger.
• Peel the tape away immediately, while the sealant is still wet.
• Leave it at least 24 hours before getting the area wet, and fill the bath or basin with water before sealing around it so the weight is already in place.

Re-seal around the bath, the shower tray, the basin where it meets the wall, and any gaps behind the vanity. For extra peace of mind, a bead of sealant along the base of a shower screen and a check of the grout for hairline cracks will save you a great deal of grief.

Do the work in a sensible order — plumbing first, sealing last — and give yourself two days rather than one. Take your time over the measurements, keep the joints clean, and you will end up with a bathroom that looks newly fitted for a fraction of the cost of a full renovation.