How to Install a Shower in a Van: A Practical Guide
Fitting a shower in a van can transform the way you travel. It adds comfort, extends your autonomy and keeps hygiene simple, letting you park up in remote spots without relying on campsites or service areas. A successful build comes down to careful planning, sensible weight management and watertight workmanship. This guide walks you through the essentials, from choosing a system to plumbing, ventilation, budgeting and upkeep.
Planning your van shower: space, weight and materials
A good result starts with a thorough plan. Take precise measurements so you make the most of every centimetre and avoid unwelcome surprises during the fit-out. Weight matters just as much: heavy items such as water tanks should sit low and be placed strategically, ideally towards the front of the vehicle and between the axles to keep the van balanced. As a rule of thumb, a 100-litre tank weighs roughly 100 kg when full, before you add a heater or pump.
To save space, look at multi-purpose solutions. Some sliding or retractable showers tuck away under a unit and use a pull-out showerhead with a hanging curtain to contain splashes; a long enough hose also lets you rinse off outside. Another common layout places the shower behind a curtain between the kitchen and living area, creating a dedicated wet zone while keeping some privacy.
Tools and materials checklist
The core of the system typically includes:
- Water heater (instantaneous, or a combined air/water unit)
- Camper shower tray and a drain/waste system
- Extractor fan and a door ventilation grille
- Shower tap and mixer, plus a mounting bracket
- Anti-odour waste valves (such as HepVo traps)
- Separate fresh-water and grey-water tanks
- Diaphragm water pump and an accumulator
For pipework, flexible hose with a 10 mm internal diameter is common. Follow the colour code, blue for cold and red for hot, and use proper clips to keep every joint watertight. Useful specialist tools include pipe wrenches, pipe cutters, benders, crimping and flaring tools, adjustable spanners and PTFE (plumber's) tape. For the wet enclosure itself, marine-grade plywood (around 12 mm), FRP sheets, marine adhesive, butyl tape, blind rivets and a waterproof access hatch are typical.
Setting a budget
Costs depend entirely on how elaborate the system is. A basic set-up with a tap and drain can start from around £1,300, while a fully featured build with instant hot water and an outdoor shower can reach about £5,600. A DIY approach keeps costs down but demands time, skill and patience; a professional install costs more but brings expertise and guarantees. For a workable indoor shower, plan for a minimum water capacity of around 115 litres, which will directly influence your tank choice and total weight. Measure twice and cut once: check everything before you drill.
Choosing the right shower system
The first decision is whether to fit a fixed indoor shower or use a portable system. Each suits a different style of travel.
| Feature | Portable shower | Fixed shower |
|---|---|---|
| Installation | Easy | Complex |
| Mobility | High | Low |
| Cost | Affordable | Higher |
| Durability and comfort | Less durable | Durable and comfortable |
Fixed showers offer permanent comfort and full privacy, and can be used in any season, which suits full-time travellers who want to wash daily. The trade-off is that they need more space, a larger initial outlay and careful humidity management to avoid condensation and mould. Portable systems shine on flexibility: they free up interior space and suit occasional travellers or anyone who prefers to wash outdoors, though they depend on the weather and often need extras such as a windbreak or shower tent for privacy.
Water storage and heating
Underfloor tanks are an excellent way to save interior space, while wheel-arch tanks follow the contours of the vehicle and add capacity without eating into living space. Across common panel vans, factory-friendly tanks typically range from about 61 to 121 litres. On a tighter budget, jerrycans are a cheap, flexible alternative and let you start simple and upgrade later. For four days of autonomy, allow roughly 10 litres of water per person.
For heating water, options range from instantaneous heaters to combined air/water units; some hybrid systems heat both the cabin and the water for better efficiency. Simple solar showers are the most economical choice and can warm water to around 60°C in summer, though their performance depends on the weather. Whichever route you take, keep any 12V wiring and heating work well within your electrical system's capacity and have it checked if you are unsure.
Step-by-step installation
Interior prep: insulation and sealing
Clean and prepare every surface so insulation and sealants bond properly. Good insulation is essential for a comfortable temperature: a well-insulated van can hold around 18°C for over 13 hours before dropping to freezing, compared with only a few hours for an uninsulated one. Around the shower, use moisture-resistant materials and seal thoroughly. Pay particular attention to corners and joints, as water ingress leads to mould and corrosion.
Plumbing: tanks, pipes, pumps and drainage
The plumbing is the technical heart of the shower, so precision here prevents leaks and keeps pressure healthy:
- Use 10–14 mm supply pipes and keep the number of joints to a minimum to reduce leak points.
- Size waste pipes at roughly 28–42 mm depending on your needs.
- Position the water tank above the pump to make priming easier, and secure flexible hoses with clips, following the blue/red colour code.
- Slightly incline the filler hose to the tank to prevent back-flow, and seal threaded connections with PTFE tape.
Fitting the shower components
Check your measurements before drilling for the drain or ventilation. Bed the PVC tray onto wooden supports with a sanitary-grade sealant (such as Sikaflex) for a durable, moisture-resistant bond, and fit an anti-odour trap between the drain and the grey-water tank. Cut PVC wall panels with metal shears to avoid cracking and seal the joints with an anti-mould sealant. Use 1/2" brass fittings to connect PEX pipe to the shower valve for good resistance to vibration. For the door, choose between a curtain on a rail, a folding door or a DIY panel, always keeping ventilation in mind.
Electrics and ventilation
Connect the pump to the van's 12V circuit using correctly rated fuses and weatherproof housings; if any part of the electrical work is beyond your confidence, have it inspected by a competent person. Ventilation is critical to stop shower moisture becoming a problem: fit an extractor at the highest point to draw out warm, damp air, with low intake grilles for fresh air. Sealing gaps around doors and windows further improves both ventilation and heat retention.
Saving space and staying efficient
In a van, every centimetre counts. Folding showers collapse away when not in use to free up floor space, and convertible designs, such as a shower built into a bench, combine seating, storage and washing in one. For tight budgets, simple portable and solar showers offer a low-cost route. To reduce water use, fit a low-flow showerhead, which can cut consumption by 30–50%, and turn the water off while soaping to save up to 70%.
Maintenance and winter care
- After each use: squeegee water off the surfaces and run the ventilation for at least 15 minutes.
- Weekly: clean the seals with an anti-mould product and check plumbing joints and tank levels.
- Winterising: before the first frost, fully drain the water circuits and add food-grade antifreeze to the traps. Store fragile parts somewhere warm.
A short monthly check of around 30 minutes goes a long way towards preventing costly repairs and keeping the system reliable, even far from home.
Troubleshooting and waste water
Leaks are the most common issue. Inspect the roof, walls, ceilings and joints regularly for signs of moisture, then tighten, repair or replace any faulty part. A silicone sealant on joints and a self-levelling sealant on the roof help limit ingress. Low water pressure is usually caused by kinked pipes, a clogged filter or a failing pump, while excessive pressure from an oversized pump can damage the system, so match the pump to your circuit.
Grey water must be handled responsibly. Never empty waste water onto public roads or into the natural environment. Across the UK and Europe, dispose of it only at designated points such as service areas, campsites and dedicated dump stations, and use a travel app to locate them in advance. Fitting the grey-water tank directly below the shower drain gives efficient, tidy drainage.
The bottom line
Installing a shower in a van is an ambitious but achievable project that rewards you with genuine independence and can add value to your vehicle. Focus on watertight interior prep, careful plumbing, tidy component fitting, safe electrical integration and effective ventilation. Manage space cleverly with folding or portable options, choose durable materials, and keep on top of routine maintenance. Get those fundamentals right and you will have a comfortable, hard-wearing shower ready for the road.
