Electrical supply connection
- Voltage: Year-round hot tubs for 4 or more people are typically 400 V (three-phase), smaller models 230 V. At 230 V, heating is slower and massage with heating cannot run simultaneously.
- Dedicated circuit: own circuit breaker (usually 3 x 16 or 3 x 20 A depending on the model) and a 30 mA residual current device, with nothing else on the circuit.
- Cable: For 400 V, typically 5 x 2,5 mm² or thicker depending on length, routed in a protective conduit to the equipment location with several metres of spare cable.
- Inspection: The connection is made by an authorised electrician and ends with an inspection report. Without it, the hot tub cannot be connected and the manufacturer will not honour the warranty.
If the house has a weak main circuit breaker, we will inform you in advance. Sometimes an increase with the distributor is sufficient; other times, choosing a model with lower power consumption is necessary.
Base
- Level and load-bearing: a filled hot tub with people weighs 1.5 to 3 tonnes, a swim spa up to 12 tonnes. The load-bearing capacity is calculated at around 600 to 800 kg per m².
- Concrete slab at least 10 cm thick, or paving on a compacted gravel bed. Lawn or interlocking pavers on sand are insufficient.
- Drainage: water must drain away from around the tub, not pool.
- Wooden deck: only after assessing the structure; often additional supports are needed or the hot tub must be placed on its own feet under the deck.
Delivery and installation
The hot tub is transported on its side using a special trolley, requiring a passage approximately one metre wide and without steps. Where this is not possible, we will arrange for a crane or telehandler to move the hot tub over the house or fence. Access will be assessed during the survey, including where the crane can park and what it can lift.
Water
To fill the hot tub, a garden hose is sufficient; this takes one to two hours. When changing the water, you need a place to drain it, preferably into the sewer or onto the ground far from the foundations.
What you are asking about
Can I do the electrical work myself?
No. The hot tub connection must be installed by an authorised electrician and require an inspection report. It involves water and electricity in one place; a residual-current device and an inspection are conditions for both safety and the warranty.
What if the hot tub won't fit through the gate?
We handle delivery using a crane over the fence or house. It costs more, but it is standard practice, not a complication. We assess this during the survey so there are no surprises on delivery day.
Is an old concrete slab or paving sufficient?
If it is level, crack-free and sufficiently strong, yes. We will assess it on site. Interlocking paving laid on sand will settle unevenly under the load, causing the tub to twist; in such cases the base must be rebuilt.