BSP Automatic Air Vent with Auto Cut-off Self-Bleeding Radiator Valve Wear-Resistant Home Improvement Supplies in Sets of 1/2/3/5pcs

*Product has got 3 operating modes:
1. Middle knob fully screwed in - automatic venting (it will shut off automatically when there is no more air in the radiator).
2. Middle knob partially screwed in - vent open.

Features:

*Easy and uncomplicated replacement – suitable for all conventional radiators with 1/2 inch thread.
*Works with swelling discs - when in contact with water, the discs swell up to prevent leakage.
*Saves heating energy through continuous and automatic bleeding of radiators.
*It has a shut-off cap that can be used to stop auto venting if so required.


*Size: 1/2" BSP.
*quantity:1/2/3/4/5pcs
*Item dimensions:L x W x H 27 x 26 x 26 millimeters
*Style: vent valve
*Controller type: ring


Package Contents:
1/2/3/5pcs vent valve（for you choose）