- 1-1/4" NPT female connections
- Horizontal or vertical inlet
- Cast iron construction
- Used to prevent "gravity" circulation in hot water heating systems
- Thumb screw allows to manually open allowing flow if main circulator fails to operate
NEW! Local Delivery within 25 miles of our store’s location. See rates at checkout.
We now offer online ordering for store pick-up! Place your order before stopping in and we'll have it ready for you.
Please read our Returns & Refunds policy at the bottom of the page