It Is Vital That the Solar Collectors and All Exposed

question 6

Multiple Choice

It is vital that the solar collectors and all exposed piping in a drain-back system be pitched a minimum of ____ toward the storage tank to allow complete drainage.

• A) 1/4 in./ft.
• B) 1/2 in./ft.
• C) 1/8 in./ft.
• D) 1/16 in./ft.

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