You are correct in that we don't convert the MNPT call out. Thank you for the advise we will change something in our call out so it doesn't convert. Also the SF stands for Service Factor and it's electrical info for the pump motors, but we don't convert it to anything so it's fine. We also don't convert the 15G/HR.

The addition of the rounding off as orders and magnitudes increase is something that we do, so it was nice that you added it. Thanks.

The conversions we use for pipe diameters are NPS and DN standards, specifically the numbers I had within the 'GetDiameter' sub. The following link will explain a bit further what I'm talking about if it interests you.
http://www.engineeringtoolbox.com/np...izes-d_45.html