How to set up an inflatable hot tub
Updated: October 2026
The carton is in the hall, the patio looks flat enough, and you want the water hot without a hose left lying in it. Setting up an inflatable hot tub is a sequence: a base that can take the weight, a check of what the listing said was in the box, a fill that does not immerse the hose, then heat from the tub’s own heater. If you have not chosen yet, start with the [hot tub comparison](/hub/steam-baths/hot-tub). The Products Compared editorial team used the listings and public UK guidance, not a timed install of each ASIN. A qualifying purchase can earn a commission at no extra cost to you.
The carton is in the hall, the patio looks flat enough, and you want the water hot without a hose left lying in it.
The carton is in the hall, the patio looks flat enough, and you want the water hot without a hose left lying in it. Setting up an inflatable hot tub is a sequence: a base that can take the weight, a check of what the listing said was in the box, a fill that does not immerse the hose, then heat from the tub’s own heater. If you have not chosen yet, start with the hot tub comparison. The Products Compared editorial team used the listings and public UK guidance, not a timed install of each ASIN. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Filter in the box | Cover in the box | Setup | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Lay-Z-Spa Lay-Z-Spa Aruba AirJet (2–3) | Type VI cartridge | Pool cover listed | Assembly required: Yes | 9.2 | about £394.74 | View offer |
| Alternative |  EASE.ZONE EASE.ZONE heated spa (4–6 claim) | Two cartridges | Cover listed | Assembly required: No; pump inflates it | 9.2 | about £667.92 | View offer |
| Best value |  MSpa MSpa Tekapo (6-seat claim) | Not stated | Not stated | Assembly required: Yes | 6.4 | about £399 | View offer |
On this page
The base comes before the pump
Inflate nothing until the ground is flat and free of stones. Lay-Z-Spa’s FAQ tells its buyers to use a flat surface that can carry the filled weight, and a cable of about 7 metres to an outdoor socket. That length is a brand figure. Do not assume the SENODON or either Generic has the same lead. If the cable will not reach, fit a socket rather than a coiled reel. The detail is on hot tub electrics UK. The SENODON title includes a ground cloth and the EASE.ZONE includes an underlay. The Aruba list does not name a ground sheet.
What you should find in the box
Open the carton against the included list, not against the energy slogan. The Aruba should show a spa, a pump, a pool cover, a Type VI filter, a ChemConnect dispenser and a repair patch. The EASE.ZONE should show a cover, an underlay and two cartridges. The Tekapo bullets do not list a cover, a filter or a ground sheet. If those parts are missing, that matches the listing, and you still need them before a serious heat. The SENODON and the drop-stitch Generic mention an insulating cover inside a saving claim, not as a packed item.
Assembly-required is Yes on the Aruba and the Tekapo, and No on the EASE.ZONE and the SENODON. No does not mean the tub arrives full of air. Fit the filter before you heat. Welsh Hot Tubs points to low water and a dirty filter as reasons a heater refuses to start. BISHTA expects you to test the sanitiser before anyone gets in.
Fill without a hose in the water
Fill from the cold supply through a hose that stays out of the water. Water Regs UK class backflow from a hose into a hot tub as category 5 unless your water company says otherwise. Category 5 is the highest backflow risk in that scheme: the hose must not be a path for spa water to return into the mains. In practice, keep an air gap. Do not drop the hose into the tub and walk away. Do not leave it submerged just while it fills. When the water reaches the level the manual marks, remove the hose completely. Do not use the household hot tap as the heater. These listings heat with the spa’s own element after the fill.
Heat, then test, then a short soak
Only the EASE.ZONE prints a heat rate: 1200 W and 0.5 / 1 °C per hour, as a pair. From 15 °C to 38 °C, the faster of those printed rates is about 23 hours, and the slower is about 46. That sum is not a meter reading, and it does not apply to the Aruba, the Tekapo or the Generics, which state no heater watts. Put the cover on once the level is right. BISHTA’s handbook treats 40 °C as the ceiling and about 15 minutes as a session. Children under four stay out. Heads stay out of the water. If the RCD trips and will not reset, or you feel a tingle, get out and stop.
Common questions
What do I put under it?
A flat, stone-free surface, plus the ground sheet if the listing included one. The SENODON title names a ground cloth. The EASE.ZONE includes an underlay. The Aruba list does not name a ground sheet, so add one if the patio is rough. The filled EASE.ZONE is about 910 kg of water plus the tub. Grass that looks level often hides a dip.
Can I fill it from the hot tap?
Use the cold supply and the tub’s heater. The listings describe heating after the fill, not a boiler doing the work. A long hot-tap fill also keeps a hose connected while the tub is open. Heat with the 1200 W element where that figure exists, or with whatever heater the other listings claim, and give it the hours the water actually needs.
Can the hose stay in the water?
No. Water Regs UK treat a submerged fill hose as a category 5 backflow risk unless the water company has said otherwise. Hold the hose above the surface, stop at the fill line, and take the hose away. A hose left in overnight is the mistake this setup is written to avoid.
Do I fit the filter before I heat?
Yes. Fit the cartridge the carton actually contains before you start the heater. The Aruba’s is a Type VI. The EASE.ZONE includes two. A dirty or missing filter is one reason heaters refuse to run, along with water below the minimum level. If the Tekapo carton has no filter, the listing did not promise one.
How long until it is hot?
Only the EASE.ZONE prints a rate: 0.5 / 1 °C per hour at 1200 W. From a cold outdoor fill that can mean a day, or two, depending which of those rates the unit actually manages. No other listing in this set gives hours from cold. A cover on from the start is the part you control.
When do I stop and call someone?
Stop if the RCD will not stay on, if you feel a tingle, or if the base is a deck you never had checked for the filled weight. Stop if water is coming through the liner on the first fill. An electrical fault or a structure that is moving is not a delay you sit through while the tub stays plugged in.
Related pages
Sources
Public UK sources used for this comparison. Listing prices, stars and review counts are the amazon.co.uk figures saved for this set on 19 October 2026.
- IET Wiring Matters, Hot tubs (retrieved 19 October 2026)
- NAPIT, hot tub installations (retrieved 19 October 2026)
- BISHTA buyers’ guide for hot tubs and swim spas (retrieved 19 October 2026)
- BISHTA daily, weekly, monthly and annual hot tub checks (retrieved 19 October 2026)
- BISHTA hot tub owners’ handbook (retrieved 19 October 2026)
- Planning Portal, hot tub in a garden (retrieved 19 October 2026)
- Water Regs UK, backflow risk categories (retrieved 19 October 2026)
- Hot Tub Geek, inflatable hot tubs and filled weight (retrieved 19 October 2026)