Description
Description
The Apollo 37-202-01 is a compact, high-performance vacuum relief valve designed to protect plumbing and heating systems from vacuum-related damage. With a 3/4" threaded connection, it features a satin brass finish and is rated for up to 200 PSIG and 250°F, making it suitable for hot water supply systems and low-pressure steam applications. This valve automatically opens to admit air when a vacuum condition occurs, preventing tank collapse or siphoning. Built with a durable brass poppet for enhanced strength, it meets CSA and ANSI standards for safety and reliability.
Features
- Automatic vacuum relief at less than ½" vacuum
- Rated for 200 PSIG pressure
- Operates up to 250°F temperature
- Vents up to 16 CFM at 2" Hg vacuum
- ¾" threaded connection
- Brass body and poppet (ASTM B16 DZR C27541)
- Stainless steel spring
- EPDM seat washer
- Glass-filled Noryl retainer
- CSA 4.4/ANSI Z21.22 certified
- NSF/ANSI 372 lead-free compliant
- Available in satin brass, rough chrome, and heavy spring variants
