Final answer:
Forged brass flare fittings are not allowed due to potential corrosion issues.
Step-by-step explanation:
Answer a: No, forged brass flare fittings are not allowed, especially if you don't plan on selling the house soon. The use of Cu/Fe pipe joints can lead to rapid corrosion, which can cause structural damage and compromise the plumbing system's integrity.
Answer b: No, forged brass flare fittings are not allowed because of the potential corrosion issues.