When a Company, organisation or individual hires any equipment they become subject to the Health and Safety at Work Act 1974.
This Act places a duty of care on everyone involved in the transaction. This means that the operator, the operator's employees, the hirer, the hirer's employees and the owner or manager of the premises where the equipment will be used should do everything possible to ensure its safe use at all times. In addition Provision and Use of Play Equipment Regulations (PUWER) require that all work equipment and that includes inflatable play, must be tested by a competent person on a regular basis (usually once per year).
Inspection by a "competent person" prior to first use and annually thereafter satisfies the provision that the equipment is suitable and safe for its intended use. PIPA defines a competent person as one who has passed a specialised examination and is registered with the RPII.
Operators using other testing schemes or methods may be required to demonstrate how such procedures equal or better the accepted "best practice" recognized and applied to the PIPA scheme by the Health and Safety Executive. Testers however well experienced, may or may not be able to satisfy a court of their competence. This is really up to you the customer to judge who you can use
The PIPA scheme provides fundamental confidence in the equipment being used, but cannot verify safe operation. For that users and operators should refer to Entertainment Information Sheet 7 (EIS7) which was issued by the HSE as explanatory guidelines for the industry and expands on the 1974 Act in relation to inflatable play equipment.