Reliable reduced-pressure protection for irrigation and commercial water systems. The Apollo RP4A (4A-200 series) 3/4" assembly delivers industry-approved backflow protection with durable bronze construction, top-access valve cartridges, and stainless-steel valve trim for long service life. Nominal size: 3/4" (0.75 in) backflow preventer specially configured as SKU 4A204A2F. Durable construction: Bronze body with full-port ball valves and stainless-steel handles and trim. Performance: Rated to 175 psi (12.07 bar) and suitable for 33–180°F operation; low head loss design. Serviceability: Top-access modular check cartridges with captured springs, replaceable seats, and reversible silicone seat discs for fast maintenance. Compliance & warranty: ASSE 1013 and CSA approvals typical for the RP4A family; backed by a five-year Apollo factory warranty. This SKU is shipped as a reduced-pressure (RP) assembly; many suppliers list it with push-fit connections or threaded test cocks—verify the connection style you need before ordering. For potable drinking-water installations, select the lead-free 4ALF variant. Installation should follow local codes and the included instruction manual; reference documentation and specification sheets are available with the product.