*Update - this is an older post. I'm mounting a dual gang selector forward on the console.
Chapter 14 is on fuel systems:
https://www.faa.gov/sites/faa.gov/files/2022-06/amt_airframe_hb_vol_2.pdf
In the plans it says to use 1 BID tapes to support the fuel lines to the
selector. It looks like most builders have put in the click bonds with Adel clamps.
Since I'm installing the dual gang selector mounted on the console, the
routing of the two lines going to each of the tanks (fuel and injection
bypass) it looks like routing along the side by the conduit up to the
front thigh support area will help avoid making some pretzel shaped
bends that would be required if routing over the heat duct. The lines
to/from the engine would route per plans over the heat duct back through
the firewall. The bottom gang will be used for the fuel going to the engine to help avoid low spots in the path. when flying straight and level or parked on the ramp. The lowest points when setting level will be the drains on the sumps and the gascolator.
All that being said, I weighed an approximate amount of click bonds and
am speculating that with the nuts and clamps needed for six lines, it
will be hard to beat the weight savings of 1 BID tapes. Near the
selector where the lines would need to be disconnected would be good for
some click bonds.
I found a table that said 3/8" should be supported every 16".
The Andair Gascolator has 70 micron screen with a lockable valve to help facilitate draining tanks without pulling fuel lines loose.
