How to diagnose and repair a Lay z spa airjet that is leaking from the pump

It happens to us all at some point and usually just as your warranty runs out. the dreaded puddle under the pump.

Bestway are not interested and stock no spares to help you but do not worry.

In just a few simple steps we can find your leak and help you fix it.

First thing to check is the your non return valve is not leaking back into the pump.

Unscrew the coupler on the larger of the three pipe. you should get no water coming back from the tub.

When you remove the coupler you see water flow coming from the tub side of the pipe then its signs of a failed non return valve.

If you do not then its time to re seal the water pump.

Dont worry its a easy job and you only need a few basic tools

Disconnect your pump from the mains as well as from your tub using the black caps bestway provide.

Tip your pump on its side but NOT upside down you don’t want any rouge water running to the top side of the pump.

Remove the 4 small screws from the grey base plate.

Then withdraw the cover. Depending on the age of the pump it may or may not be attached with a earth wire.

You will be able to see the pump clearly with plenty of access apart from one screw at the back of the water pump.

Using the Flat head screwdriver remove the Hose clamp and wiggle the pipe off the pump.

The black o-ring shown here is only on some models so dont panic if you dont have one.

Now Unplug the wire going to the transformer. it has a twist lock connecter and 2 pins. there is no polarity on this so you can connect it back either way.

With the water pump all disconnected we are ready to remove it. There’s two screws one on either side. the back one can be troublesome unless you have a long magnetic screwdriver.

With these screws removed you should be able to wiggle the pump out and into the open.

Your seals will likely be black and perished. mine are fresh because i’ve just pulled a perfectly running pump apart that i had previously refurbished just to make this guide 🙂

Now remove the six screws from around the pump and it will split in half exposing the impeller and gasket seal.

If you find you impeller or any of the seals are damages or perished we stock either individual seals a full seal kit or the impellers come complete with all pump seals.

Impeller kit from our shop £34.99 or from eBay

Full Seal kit from our shop £4.99 or from eBay

Gasket Seal from our shop £3.49 or from eBay

Outer Seals from our shop £3.49 or from eBay

With a new impeller with stainless steel shaft and some shiny new seals you can work backwards to put your pump back together.If you find this guide useful come and follow us on our Facebook page @

Unofficial Lay Z Spa Hot Tub Life After Warranty Group