With Flapper: The ARITA Cast Iron Sight Glass with Flapper comes equipped with a flapper mechanism, which allows for better flow control and can help in preventing backflow or splashing. It is ideal for systems where you need both clear visibility and flow regulation.
Without Flapper: The ARITA Cast Iron Sight Glass without Flapper provides a simple, reliable solution for observing fluid levels and flow, without the added flow control feature. It’s perfect for applications that only require clear viewing of fluid or gas without additional interference.