The Hunter HCV HC50F50M is an adjustable anti-drain check valve designed to eliminate low-head drainage on sloped landscapes. It installs between the riser and sprinkler head and provides reliable, adjustable shutoff for 1/2" irrigation lines. Adjustable elevation: Top-access adjustment compensates for elevation changes from 4 to 32 ft (1.2–9.7 m). Connection: 1/2" female inlet x 1/2" male outlet (FPT x MPT) for common riser and head fittings. Durable construction: Manufactured to Schedule 80 specifications for pressure resistance and long service life. Compact size: Overall length approximately 3 in (76 mm); fits standard risers without extra fittings. Easy installation: Install between riser and head—adjust height from the top without disassembly. Warranty: Backed by Hunter's two-year limited warranty. Ideal for rotor and spray shrub systems on uneven sites, the HC50F50M prevents puddling and reduces water waste while offering dependable performance. Use with standard 1/2" irrigation risers and follow Hunter installation instructions for best results.