Double Square Tap Connector in Dispenser Instantaneous Couplings & Accessories Connecting follows a simple principle:

Connecting follows a simple principle: female and male parts made of malleable cast iron or steel are locked by two handles (except Type 25 which are single-handed)

Lightweight and flexible with good kink resistance

LDPE smooth liner offers excellent chemical resistance  for chemical dosing applications and superb flow characteristics

To make it more durable

plaster or screed

Double Square Tap Connector in Dispenser Instantaneous Couplings & Accessories Connecting follows a simple principle:Double Square Tap Connector in Dispenser For taps with 3 4 (20 27 mm) thread. Includes on off valves and washer. Enables assembly of two water timers, pressure reducers, etc.