Each manifold comes complete with:

- Visual flow gauges (GPM) for each circuit on supply side; flow gauges have internal polymer "cages" to prevent build-up of debris, can be used for individual circuit isolation and have an accuracy of +/- 10%

- Circuit balancing/isolation valves on return side

- Two 1 in. NPT supply and return manifold isolation valves with thermometer housings; two mini thermometers included

- Two air vent/boiler drain valves with manual air vent and 3/4 in. GHT hose connection

- Manifold circuit chart

- Vent key and key holder

- Product instructions