The Engineers will arrive on site, they will put a Hot Tub flush into the system and let this run for an hour, while this is running through, they will perform a full check on the parts within the Hot Tub, ensuring there is no damage or issues with any of the parts. They will then drain the Hot Tub down, clean the inside out, removing any debris and anything that the flush has brought out of the system. Once they are satisfied that the Hot Tub is clean, they will then begin refilling the Hot Tub for you. They will stay with the Hot Tub until it is full and check that it is heating and working correctly. If any parts require replacement, they will discuss this with you and then change the necessary parts, provided you are happy for them to be changed. The Servicing fee will be charged prior to the Engineer's attendance, and if any parts need changing, they will be charged on the day. The Engineers carry the majority of possible spare parts; however, in the unlikely event of a second visit being needed, this would require a further Engineer call-out fee. (Please note, Hot Tubs that are out of warranty will incur extra charges for any parts used)