double trapping is a problem because\nthe water velocity is too great\nyou need cleanouts on both traps\nthe…

double trapping is a problem because\nthe water velocity is too great\nyou need cleanouts on both traps\nthe water velocity at the second trap is too low\nthe water velocity at the first trap is too high\nthe second trap is prone to siphoning\nquestion 34\nwhat is the minimum recommended height of a plumbing vent stack above the roof?\n12 inches\n30 inches\n24 inches\n6 inches\n1 inch

double trapping is a problem because\nthe water velocity is too great\nyou need cleanouts on both traps\nthe water velocity at the second trap is too low\nthe water velocity at the first trap is too high\nthe second trap is prone to siphoning\nquestion 34\nwhat is the minimum recommended height of a plumbing vent stack above the roof?\n12 inches\n30 inches\n24 inches\n6 inches\n1 inch

Answer

Brief Explanations:

Double - trapping is a problem because the second trap is prone to siphoning as the flow from the first trap can create negative pressure and draw out the water seal of the second trap. For the plumbing vent stack height, the minimum recommended height above the roof is 12 inches to prevent debris entry and ensure proper venting.

Answer:

  1. the second trap is prone to siphoning
  2. 12 inches