Netsys Gas fixed pipework size problemhttps://communities.bentley.com/products/building/performance/f/hevacomp-forum/225225/netsys-gas-fixed-pipework-size-problemWhy is Netsys Gas changing my fixed pipework size and how do I overcome this? I have an installed gas system that I need to model to ascertain what source pressure we need, but it&#39;s no good if Netsys keeps overriding the fixed pipework size so thaten-USTelligent Community 12RE: Netsys Gas fixed pipework size problemhttps://communities.bentley.com/thread/694153?ContentTypeID=1Mon, 31 Jan 2022 11:43:07 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ec1000ce-5e1a-47fc-9c40-e5415498a330Shane Regan<p>Hi Tony,</p> <p>The software will be rationalising the pipe sizes to reduce unnecessary changes in size. Example 2 in the below Wiki shows how you can get around this (it refers to ductwork but the process is much the same for pipework), by adding small transitional pipe section(s) next to the section to be fixed.</p> <p><a href="/products/building/performance/w/building_performance__wiki/19877/duct-sizing-allowing-for-a-depression">Duct sizing - allowing for a depression - Hevacomp Wiki - Hevacomp - Bentley Communities</a></p><div style="clear:both;"></div>