Float valve KK-Pol ZN3/118/0/T 3/8" (ZN3) for water systems, plastic construction

KK-Pol float valve ZN3/118/0/T is a 3/8" threaded water-stop float valve designed for automatic water level control in tanks, cisterns and small water installations. The unit features a plastic construction that resists corrosion and provides lightweight, low-maintenance operation. It closes the inlet when the set water level is reached, ensuring reliable shut-off and preventing overflow in domestic and light commercial systems.

Advantages

The plastic body and components provide corrosion resistance and reduce the risk of scale build-up compared with some metal valves. The 3/8" threaded connection enables straightforward installation into existing piping or fittings. Its compact size and simple mechanism make it suitable for confined spaces and installations where a low-maintenance automatic shut-off is required. The valve offers consistent performance for typical water supplies when installed and adjusted according to the system requirements.

Suitable for

• Tanks and cisterns for domestic water storage
• Small water supply installations and booster systems
• Rainwater harvesting and reuse tanks
• Toilets, urinals and similar cistern-fed fixtures

Key specifications

• Connection type: 3/8" threaded inlet
• Material: plastic construction for body and float
• Function: automatic float-controlled inlet shut-off
• Typical application: low- to medium-pressure water systems
• Mounting: side or top fitting depending on tank geometry

How to use

Install the float valve into the tank or cistern at the appropriate inlet location using the 3/8" threaded connection. Position and secure the valve so the float can move freely without obstruction. Adjust the valve height or float arm as needed to set the desired shut-off water level. After installation, open the supply and verify correct operation by observing that the valve allows inlet flow while the level is below the set point and closes fully when the level reaches the set point.

Usage recommendations

Use clean potable water or filtered supply to reduce sediment and prolong valve life. Check for leaks after installation and periodically inspect the float movement and sealing surfaces. Avoid chemical exposure or temperatures outside the manufacturer's recommended range for plastic materials. For installations with variable pressure or heavy particulates, consider additional filtration or a pressure-regulating device upstream of the valve.