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Hot Tub Parts, Spa Spares and Accessories

Welcome to 'Hot Tub DIY' we are hot tub pump and spare parts specialists, we have hundreds of pumps to choose from with free next day delivery and literally thousands of hot tub parts at very competitive prices and offer free technical advice to help you to get the right part easily. There are many ways to find what you want on our site, type anything into the search box on the navigation to do with spares;  and it will give you a list, type a general word (for example pump) and choose from the drop down fields in the left column. Also why not try out our new feature product comparison, the ' Pumps' and 'Filters categories have had a make over try our new compare option where you can compare up to 4 items at a time next to each other.

We also have a range of accessories including filters, fragrances chemicals and even toys!

Some of our other features consist of combination discounts on everything from bulk buying hot tub filters to combination sales on covers and cover lifters. If at any point you need more detail on any spa or hot tub related issues please contact us via or contact page.

'10 Hot Tub Tips' every hot tub owner needs to read

Why not take a minute out and read: 10 Hot Tub Tips every owner needs, Read these tips they may save you money and keep your tub running smoothly.  

Featured Products
2HP Waterway Pump 2 speed 56F (2'' x2'')

2HP Waterway Pump 2 speed 56F (2" x2")£308.00

Heater for wooden hot tubs bundle

Heater for wooden hot tubs bundle£458.34


Bundle of parts

HA440 Hydro Air Magnaflow 2 speed pump Replacement

HA440 Hydro Air Magnaflow 2 speed pump Replacement£310.00

PLBS75 Filter

PLBS75 Filter£34.50

C4950 Filter

C4950 Filter£23.82

ITT Marlow J250 1 speed Pump Replacement

ITT Marlow J250 1 speed Pump Replacement£305.00

GC150-2XJ-B Pump Replacement Kit

GC150-2XJ-B Pump Replacement Kit£330.00


2 Speed Pump

Balboa 3KW M7 Heater - GS/GL

Balboa 3KW M7 Heater - GS/GL£135.00


Fits Plastic Box

AquaSparkle Chlorine Starter Pack

AquaSparkle Chlorine Starter Pack£38.47

Tecmark Pressure Switch

Tecmark Pressure Switch£23.00


3902 - 3903

O Ring 2'' for Pumps and Heaters

O Ring 2" for Pumps and Heaters£1.79

Vian Chlorine Granules 1kg

Vian Chlorine Granules 1kg£14.00

Latest Product Reviews
Thursday, 12 October 2017  |  Jack

product arrived well packed and in good condition, exactly what I wanted. All I had to do was fit my old plug and install in my hot tub. Slight alteration to base centres, but is working perfectly.

Very happy with part and help
Monday, 9 October 2017  |  Nicholas

I told my local hot tub company of the leak in my hot tub pump and their suggestion was a new pump. Hot tub diy on the other hand supplied a new wet end and advised on fitting via email. I have successfully fitted it at a fraction of the cost that my local company would have charged.

Sunday, 8 October 2017  |  Raymond

Excellent service

Perfect for heating your wooden hot tub
Saturday, 7 October 2017  |  Robin

I've got a 2.0m diameter wooden hot tub (wood fired) which equates to just over 3000 ltrs. Bought this kit to (a) add filtration and (b) to supplement the wood stove to keep water at temperature over night. The kit has everything you need to complete the install (I had to order a bit more pipe given the size of the tub) and was completed in one weekend. The heater is perfect at keeping the tub at temp. and will even heat from cold in about 24 hours. Excellent bundle!

Latest Products
Vian 1.5kg PH Minus

Vian 1.5kg PH Minus£11.00

Vian 1kg Alkalinity Increaser

Vian 1kg Alkalinity Increaser£11.00

Vian 1kg PH Increaser

Vian 1kg PH Increaser£11.00

Vian 1ltr Cartridge Cleaner

Vian 1ltr Cartridge Cleaner£14.00

Vian 1ltr Surface Cleaner

Vian 1ltr Surface Cleaner£14.00

Vian Anti-Foam 1ltr

Vian Anti-Foam 1ltr£14.00

Hot Tub DIY

Hot Tub Help? Call Now 08455 197 497Call Mon - Fri 10am - 4pm calls cost a local rate *** Welcome to Hot Tub DIY the No1 place to buy hot tub parts in the UK, Please send an email if you have any technical enquires. ***