Material declaration

The polymer grade, and whether it is ultraviolet stabilised

Weathering record

Equivalent exposure, and whether the part was still flexible afterwards

Seal specification

The compound, and what it was tested against

Fill test

That joints were checked wet rather than dry

Hose fatigue record

Repeated loading at full weight, on the handle fixing

Colour standard

The approved reference, and the tolerance around it

Revision statement

Which revision the batch was made to, and which mould

Packing record

How it was packed, because mouldings scratch and stack

An illustrative list for a fictional range. A real programme agrees which documents are required, in what form, and how long they are retained.

The one that is most often missing.

The weathering record. A material described as suitable for outdoor use without an exposure figure and a flexibility result is a claim rather than a result, and it fails in the second summer.

Why the fill test belongs on the list.

Because a joint that is watertight is not the same as a joint that looks sound. Filling the product is the only check that finds a leak, and it is quick.