1. What is the Zurn 975XL2U used for?
The Zurn 975XL2U is a reduced pressure principle backflow preventer designed to protect potable water systems from contamination due to backsiphonage or backpressure. It is typically used in high health hazard applications, such as commercial or industrial water supply systems.
2. What are the key features of the Zurn 975XL2U?
- Lead-free cast bronze construction
- Wye pattern design for easy access to internal components, reducing maintenance time and costs
- Maximum working pressure of 175 PSI
- Maximum working temperature of 180°F
- Compliant with NSF/ANSI/CAN 61 standards
- ASSE® Listed 1013, IAPMO® Listed, and CSA® Certified
3. In what sizes is the Zurn 975XL2U available?
The Zurn 975XL2U is available in sizes ranging from 3/4" to 2", making it suitable for a variety of water line sizes.
4. How does the Zurn 975XL2U work to prevent backflow?
This device uses a reduced pressure zone assembly to prevent contaminated water from flowing back into the potable water supply. It consists of two check valves with an intermediate relief valve that opens if the pressure between the two valves becomes too high, ensuring the system remains protected.
5. What makes the Zurn 975XL2U unique compared to other backflow preventers?
The Zurn 975XL2U features a wye pattern design, which offers separate access to each check valve and the relief valve. This layout simplifies maintenance and repair, reducing labor costs and system downtime. Additionally, its short lay length makes it easier to install or replace.
6. What installation considerations should I be aware of for the Zurn 975XL2U?
The 975XL2U must be installed at a minimum of 12 inches and a maximum of 30 inches above the floor or ground, and adequate drainage should be provided to prevent submersion. Proper side clearance is necessary for maintenance and testing.
7. Is the Zurn 975XL2U compliant with safety and plumbing standards?
Yes, the Zurn 975XL2U complies with several standards, including:
- ASSE® 1013 Listed
- NSF/ANSI/CAN 61 Certified
- AWWA Compliant C511
8. Does the Zurn 975XL2U come with any additional accessories?
Optional accessories for the 975XL2U include air gaps, repair kits, and thermal expansion tanks, all of which can help enhance the device’s performance and lifespan.
These FAQs cover essential details about the product's use, maintenance, and compliance standards, providing valuable insights for potential buyers or installers.