Watts 0887121 3/4"-1" Second Check Kit RK909CK2

The Watts 0887121 Second Check Kit is an essential part of HVAC systems, is suitable for 3/4 “-1” line, and belongs to the RK909CK2 series. It also comes as the second check kit which prevents the backward circulation of water in the system’s plumbing. This helps to block reverse flow of effluent back into water that is safe for drinking curtailing contamination of the potable water system. Designed for boiler and other hydronic heating, this kit prevents changes in pressure and back-siphonage from occurring. They include protection of water sources from contamination, proper flow assurance within the system, and safeguarding of HVAC equipment from backflow damage.