IAPMO IGC 178-2019为疏水阀底漆的重力给水分配歧管提供了最低设计和性能标准。这些分配系统通常与捕集器底漆一起使用，将重力给水分配到多个p-捕集器，以维持p-捕集器的水封。

IAPMO IGC 178-2019 provides the minimum design and performance criteria for gravity fed water distribution manifolds for trap primers. These distribution systems are typically utilized in conjunction with trap primers to distribute gravity fed water to multiple p-traps for maintaining the p-traps water seal.