Tecmark Pressure Switch [3903-DF Adj SPST] (3903-DF) NuWhirl Helps manage flow through the

Helps manage flow through the feeder plumbing setup

The Waterway 805-0000 main tank body O-ring is designed for compatible Crystal Water system applications where sealing around the main tank body is critical

and this Gecko TSC-8/K-8 version is designed in a 10-button large rectangular LCD format for 3 pump applications using the BDLTSC810K reference

and this generic version is sized with a 5-7/8 inch inside diameter and 3/16 inch cross-section using the 360-VT75BR reference

which can make equipment renewal much simpler when the original unit is worn out or damaged

Tecmark Pressure Switch [3903-DF Adj SPST] (3903-DF) NuWhirl Helps manage flow through theTecmark Pressure Switch [3903 DF Adj SPST] (3903 DF) is a Tecmark replacement pressure switch used in compatible spa and hot tub control systems. Pressure switches help monitor water flow or pressure conditions so equipment can operate with the intended safety logic and control response. A failing or mismatched pressure switch can contribute to heating errors, equipment interruptions, or unreliable system operation. This replacement is intended for