Contact
One address, for everything: [email protected]. There is no form to fill in and no account to make — email is simpler and it does not set a cookie.
What is worth an email
A result you think is wrong is the most useful thing you can send. Tell me the calculator, the numbers you put in, and what you got — the formula is on every page, so a disagreement is easy to run down. Corrections get priority over everything else, because being right is the only thing this site has.
What makes a correction easy to run down
Four lines and I can usually reproduce it in a minute. Without them it is guesswork.
If the disagreement is about a mark on real pipe rather than about the arithmetic, it is worth doing the test bend first — the commonest cause by a long way is a take-up figure that does not match the tool.
- Which page. The address, or just the name of the bend.
- Exactly what you typed. Every field, as you typed it —
1' 3 1/2"and15.5are the same length but not the same input, and if one of them is mishandled that is the bug. Say whether the site was on Imperial or Metric. - What it showed and what you expected. Both numbers. "It is out by about a quarter" is a different problem from "it is out by a factor of two".
- Phone or desktop, and which browser. Only matters for a layout or a button that will not press, but then it matters a lot.
What I cannot help with
Anything that needs the code book or the inspector. How many bends are allowed between pull points, minimum radius, support spacing, fill, whether a method is permitted where you are — those have answers, they are just not mine to give, and the reasoning is on the disclaimer page. I also cannot tell you whether an install you describe in an email will pass; the person who can is the authority having jurisdiction for that job.
What I can do is make sure the geometry underneath your question is right, and point you at the page that covers it.
Requests and everything else
If there is a bend you keep working out by hand that is not here yet, say so; the page inventory grows from real requests. Questions about how a calculator works are welcome too. Replies come when they come — this is a small, one-subject site, not a support desk.