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Buying a Second Hand Hot Tub: 7 Checks Before You Pay

Fill it, run it, look underneath.

Check seven things before you pay for a second hand hot tub: the cover, shell, cabinet, pumps, heater, pipework and electrics. A private seller has to describe the tub accurately but does not have to point out faults,1 so a close look at a working tub is your best protection.

7

checks, in the order you walk round the tub

Walk round the tub

Ask the seller to fill the tub and heat it before you arrive, so the pumps, jets and heater are all running when you look. Checking the jets and pumps with the tub full of water shows you how it really runs.2 Bring a torch, a tape measure and a thermometer.

  1. 1Cover
  2. 2Shell
  3. 3Cabinet
  4. 4Pumps and jets
  5. 5Heater
  6. 6Pipework
  7. 7Electrics
Cutaway side view of a hot tub showing the cover, shell, cabinet, pumps, heater, pipework and electrics 1 2 3 4 5 6 7
1

The cover: lift it and feel the weight

A cover that has soaked up water feels heavy and no longer insulates, which pushes up running costs.3 Look for tears and a poor fit around the rim.3 A tired cover is a known cost to set against the price: our Outdoor Living hot tub covers come in sizes such as 200 x 200 cm and 216 x 216 cm from £299, so measure the top of the tub before you buy.

2

The shell: run your hand over every surface

Look for cracks, scratches, warping and leaks,2 and for discoloration or fading.3 Check the seat edges, the footwell and the area around each jet, and shine a torch along the surface so any ripples show up. Once the tub has been full for an hour, look for damp on the cabinet floor below.

3

The cabinet and frame: look underneath

Rot, rust, warping and bent panels are the signs to look for in the frame and side panels, especially on an outdoor tub.23 Kneel down and check the bottom edges of the panels and the base, where damp collects. Square panels and a firm frame suggest a tub that has been kept dry.

4

The pumps and jets: switch everything on

Run every jet and check the pressure is even. A grinding noise from a pump can point to a failing motor.2 Try the lights and every button on the control panel too.3 Replacement parts are listed in our hot tub pumps and drainage parts, so you can price the worst case before you agree a figure.

5

The heater and control panel: let it heat up

40°Cis the top limit for the water in a domestic hot tub.

The panel should run with no error codes while the water warms steadily.2 Water in a domestic hot tub should never go above 40°C, the limit in the European standard for hot tubs, BS EN 17125.4 Hold a good quality thermometer in the water and compare it with the display to confirm it reads true.4 That standard was published in December 2018,5 so ask the seller when the tub was built and who made it. Our hot tub temperature guide covers where most people set theirs.

6

The pipework and seals: look for leaks, then plan a clean

Bottle of Swirl Away hot tub pipe cleaner liquid

Swirl Away Hot Tub Pipe Cleaner Liquid£12.99

Pour half a bottle into the tub when it is full of hot water, run the pumps for an hour with the air off, then drain and rinse before you refill. It removes scale, soap and build-up from the pipework.

Look around the jets, the seals and the underside of the shell for drips or damp.3 HSE guidance for spa pools calls for pipework that can be inspected, cleaned and treated to keep biofilm in check,6 and describes spa-pool systems as a recognised source of infection from germs such as legionella.7 A pipe clean on your first fill is the sensible start.

7

The electrics: the control box and the supply

If the equipment bay opens, look at the control box and circuit board for dark, burnt spots.2 The supply to a hot tub should be protected by a 30 mA RCD, with the cable protected along its route, and installed and tested by a qualified electrician who gives you an Electrical Installation Certificate.8 A fixed connection with an isolator outside the 2 m zone around the tub is the best arrangement.9 Book the electrician before the tub arrives, and read our hot tub electrical installation guide first.

Paperwork to ask for before you pay

Private sales are usually sold as seen, without a warranty,2 so the paperwork is where you find out what the tub has been through.

Buying from a business gives you the same rights as buying from any other shop. Buying from a private seller means the tub must match its description, and the seller does not have to point out faults.1

From the seller

  • Service records and receipts for any work done.2
  • Six months of electricity bills, which show what the tub costs to run.3
  • The model name, serial number and year, usually on the rating plate.
  • A receipt that names the tub, the price and every claim in the advert, such as the age or a new heater.

From the maker or dealer

  • Whether there is a warranty and whether it can transfer to you.2 Jacuzzi's UK guarantee, for example, can pass to a later owner of the property where the tub was first installed once Jacuzzi has been told by the registered owner.10
  • Whether the maker still supports older models and supplies parts.3
  • Get the answers in writing before you hand over any money.

Getting it home and running

Professional transport, a suitable foundation and the electrical set-up all add to the price of a second hand tub.3 Sort these before collection day.

  1. Measure the route and the spot

    Measure the tub, the gate and the doorways it has to pass, and the space where it will stand. Our guide to what to consider when buying a hot tub covers sizes and siting.

  2. Prepare a level base

    A filled tub is heavy, so it needs a flat, firm base that bears the full weight of the tub and the water. Check the weight with the maker or the rating plate before you order the base.

  3. Clean it on day one

    Drain and flush the pipework, then clean the filters; HSE guidance suggests keeping two sets so one is cleaned and dried while the other is in use.6 Our beginner's guide to hot tub maintenance and hot tub safety guide take you through the first weeks.

Top-down lifestyle view of the Outdoor Living Comfort hot tub

Outdoor Living Comfort Hot Tub

Seats 4 · 20 jets · £2,899

If you would rather start with a new tub, the Comfort has Balboa controls and ozone water purification. It measures 210 x 150 x 74 cm, runs from a 13 amp supply and comes with a 1 year warranty. See the full Outdoor Living hot tub range.

Quick answers

Open a question to read the answer.

What should I check when buying a second hand hot tub?

Fill it and run it, then check seven things: the cover, the shell, the cabinet and frame, the pumps and jets, the heater and control panel, the pipework for leaks, and the electrics. Ask for service records and find out whether any warranty passes to you.

Is it safe to buy a second hand hot tub?

It can be, once the tub has passed your checks and the electrical supply has been installed and tested by a qualified electrician. Clean the pipework and filters before your first soak, and keep the water at or below 40°C.

Does a second hand hot tub come with a warranty?

Private sales are usually sold as seen, with no warranty. Whether an existing manufacturer guarantee passes to you depends on the maker's terms, so ask them in writing before you pay.

What are my rights if a private seller's hot tub is faulty?

A private seller must describe the tub accurately but does not have to point out faults, so inspect it with the water running and get every claim in the advert written on the receipt. Buying from a business gives you the same rights as buying from any other shop.

Do I need an electrician to install a second hand hot tub?

Yes. A hot tub needs a supply protected by a 30 mA RCD, installed and tested by a qualified electrician who gives you an Electrical Installation Certificate. Book them before the tub arrives.

How do I clean a second hand hot tub before using it?

Fill it with hot water, add a pipe cleaner such as Swirl Away, run the pumps for an hour with the air off, then drain and rinse. Clean or replace the filters, refill, and balance the water before you get in.

Paul Margerison, Managing Director & Founder of Outdoor Living

Managing Director & Founder, Outdoor Living

A second hand hot tub can be a great way into the hot tub life when you know what to look for. This guide gives you a clear list to take with you.

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