Pump Descaler + Impeller + Heater Seals for Lay-Z-Spa AirJet Pumps Fix Leaks E02

This product data sheet is originally written in English.


The Spa Workshop

AirJet Pump Descaler

#58113 / #P4071 Filter Pump Service Kit + Aluminium PTC Heater Service Kit

Service Pack Four - Compatible with Lay-Z-Spa & SaluSpa AirJet Pumps

UK Designed and Manufactured

Common Problems

At The Spa Workshop, we service and repair hundreds of Bestway Lay-Z-Spa AirJet pumps every month. The majority of faults we diagnose are attributable to limescale accumulation within the heater matrix, which restricts water circulation and subsequently triggers a range of error codes.

E01 - Frequently caused by limescale and debris accumulating on or around the flow sensor, impairing paddle movement.

E02 – Indicates that insufficient water flow is being detected. If you have brief sound and water flow from the pump, this is most commonly caused by limescale accumulation within the heater assembly, which restricts circulation, reduces flow rate, and triggers the protection fault.

If there is no sound or water flow before the E02, the most common cause is a failed filter pump impeller assembly. A comprehensive service kit for the #58113 and P4071 filter pump is included.

E04 and E08 – Result from localised overheating within the heater matrix, commonly caused by reduced flow efficiency due to scale buildup.

In hard water areas, routine descaling of your Lay-Z-Spa AirJet pump is essential for preventative maintenance. Removing calcium deposits from the heater matrix, circulation pump, and flow sensor restores correct flow rate, improves thermal transfer, and reduces stress on internal components.

Our descaler attachment functions as a compact standalone rigid liner, enabling you to operate and evaluate your pump independently of the inflatable liner. This allows accurate diagnosis and rectification of issues such as leaks, degraded components, and persistent fault codes. It can also be used to prevent FreezeGuard activation from initiating an E02 or E03 fault when inflating your spa in low ambient temperatures.

Comprehensive step by step operating instructions for the descaler are provided, and our team remains readily available to offer guidance and technical support should you require any assistance.

What makes our descaler the market leader?

What's Included?

Service Pack Four (SP4) provides all components required for effective descaling and comprehensive maintenance of your Lay-Z-Spa AirJet pump.

#58113 / #P4071 Filter Pump Service Kit – Includes replacement seals to eliminate leaks and a replacement impeller assembly designed to resolve E02 faults caused by reduced circulation performance.

Aluminium PTC Heater Refurbishment Kit – Specifically engineered to replace failed manifold gaskets and flow sensor seals, making it ideal for rectifying leaks and persistent drips from the heater assembly. The kit also includes extended-length screws to increase clamping force and improve sealing integrity, along with a metal brush to prepare and clean mating surfaces prior to reassembly, ensuring a durable, long-lasting seal.

Compatibility

Our descaler is fully compatible with all ‘Green Ticked’ Lay-Z-Spa and Bestway SaluSpa AirJet pump models shown. It is not compatible with HydroJet or UltraFit model pumps.

The #58113 and #P4071 filter pumps are fitted in all Lay-Z-Spa and SaluSpa AirJet models manufactured between 2007 and 2024. Our kit is fully compatible with these pumps. Models produced from 2025 onward may use the P3172 pump, which is unfortunately not compatible.

Aluminium PTC heater assemblies are fitted to all S100x0x series pumps manufactured between 2020 and 2024. Units produced from 2025 onward may incorporate a revised and incompatible heater design.

Aluminium PTC heaters are also installed in the majority of legacy 'egg shaped' AirJet pumps manufactured between 2006 and 2018. Pumps produced between 2019 and 2021 are likely to be equipped with an alternative heater configuration that is not compatible.

If you’re unsure as to suitability; please contact us, our friendly team is always happy to help.

UK - Orders are despatched, free of charge, via Royal Mail 48. Delivery time is usually between 1 - 3 working days from despatch. If you require a faster service, the option to upgrade to Royal Mail Special Delivery is available at checkout.

WORLDWIDE - Orders are despatched via Royal Mail International Tracked. The cost of this is based on weight and calculated at checkout. Delivery time varies upon destination and customs clearance, but is usually between 5 - 14 working days from despatch. Please be aware that all applicable import duties, taxes and customs charges remain the responsibility of the buyer.

TRACKING - Tracking information is uploaded to your eBay order once despatched.

DISPATCH - All orders are shipped Monday to Friday, excluding weekends and public holidays. Please see same day cut off time above.

COLLECTION - We welcome collection strictly by appointment only.

About Us

The Spa Workshop Ltd is based on the edge of The New Forest National Park near Southampton, UK, and specialises in the parts, servicing, and repair of inflatable hot tub pumps. With years of hands-on experience and technical expertise, we are proud to be recognised as one of the world’s leading authorities on Bestway Lay-Z-Spa and Coleman SaluSpa systems. Whether you are troubleshooting an issue, searching for the right replacement part, or seeking professional repair advice, our friendly team is always happy to help.

© The Spa Workshop Ltd
Aluminium PTC Heater Refurbishment Kit – Specifically engineered to replace failed manifold gaskets and flow sensor seals, making it ideal for rectifying leaks and persistent drips from the heater assembly. The kit also includes extended-length screws to increase clamping force and improve sealing integrity, along with a metal brush to prepare and clean mating surfaces prior to reassembly, ensuring a durable, long-lasting seal. The Spa Workshop Ltd is based on the edge of The New Forest National Park near Southampton, UK, and specialises in the parts, servicing, and repair of inflatable hot tub pumps. With years of hands-on experience and technical expertise, we are proud to be recognised as one of the world’s leading authorities on Bestway Lay-Z-Spa and Coleman SaluSpa systems. Whether yo