Accessibility

We want everyone to be able to read this guide and use its tools. This page says what we have done, what we know is not yet right, and how to tell us about a problem.

What the site does

• Every page can be used with a keyboard, with a visible focus outline on links, buttons and form fields.
• A "skip to content" link jumps past the menu.
• Each diagram has a text description, and the figures it shows are also written out in the page.
• If your device asks for reduced motion, the moving parts (the pipe diagram and rolling figures) stop.
• The installation planner and the stage walkthrough show their content even if scripts do not run.
• Text sizes scale with your browser settings, and the layout works on small screens.

The interactive parts

Two parts of the site respond to input. The stage walkthrough on the home page uses real buttons for each stage, announces "Stage 2 of 4" and similar to screen readers, and moves focus to the stage you choose. The installation planner on the cost page uses standard form controls with labels, updates its results in a region that screen readers announce, and shows a full table of every size band that can be read without using the planner at all. The printable checklist uses ordinary checkboxes and keeps your ticks only in your own browser.

Tables and figures

Price tables have column and row headings so they read in order, and wide tables scroll sideways on small screens instead of squeezing their text. Where a chart shows prices, the same prices appear in the text or a table on that page.

Known gaps

Some diagrams carry a lot of text as part of the image; where that happens, the same information is in the page text. If you find a page where it is not, please tell us.

Reporting a problem

Use the form below. Say which page and what happened, and if you use assistive technology, which one. SEO-DONS LTD reads every message and replies by email.