Water Heater Supply Line clearance?

Was wondering if anyone has an answer to this. When using the flexible hot water lines made by fluidmaster. The ones with the rubber core & braided steel cover. What is the minimum distance they can be from asingle wall water heater vent line. I would think a minimum of 6" but I cannot find anywhere that documents that & you know how it is trying to contact the company. Does anyone have & answer & possibly written proof/Specs? -------------------------------------
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On Jul 14, 6:16am, family2100_at_gmail_dot snipped-for-privacy@foo.com (tim2100) wrote:

Try a phone call to the manufacturer customer service. Be brave. You may actually find it isn't all that hard to do. You may not get a definitive answer, so bounce the question to your local building inspection people. Beyond that, vent lines don't all that hot and 6" is likely to be perfectly proper.
Joe
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tim2100 had written this in response to http://www.thestuccocompany.com/maintenance/Water-Heater-Supply-Line-clearance-383831-.htm :
tim2100 wrote:

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Update: I talked to a local plumber & he stated that the local code says these types of lines have to be 18" away from single wall vent lines.
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On Jul 14, 9:24pm, family2100_at_gmail_dot snipped-for-privacy@foo.com (tim2100) wrote:

If the vent line is in the center (naturally) that means the heater inlet/outlets take a right angle for a few inches, then another right angle if they go vertical as most do. This puts the connecting pipes 18" + 18" + 4" apart, some 40" in simple math. I have never seen any installation like that. So there must be some other clever geometric arrangement or the local code is wrong. Enlighten, please.
Joe
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