Hunter Pro-Spray Check Valve 437400SP - Field-Install Drain Check

Replacement drain check valve engineered for Hunter Pro-Spray pop-up sprinkler bodies (SKU 437400SP). Installed in the Pro-Spray body, this field‑install option prevents low‑head drainage at sprinkler heads on slopes, helping protect turf and plantings while conserving water.

• Specifically designed for Hunter Pro-Spray pop‑up bodies; installs into the existing sprinkler riser.
• Stops low‑head drainage after system shutdown to prevent puddling, erosion and plant damage.
• Reduces wasted water from leaky nozzles and improves overall system efficiency.
• Field‑installable — insert into the Pro‑Spray body without replacing the entire head.
• Compact, lightweight design for reliable sealing and long service life when used with compatible heads.

Compatible with Pro Adjustable Nozzles, Pro Fixed Nozzles and MP Rotators when used in Pro‑Spray bodies. For model‑specific lift/hold values and detailed installation steps, refer to the Hunter Pro‑Spray specification sheet and the 437400SP product page. Documents and spec sheets are available from the manufacturer for professional installers and maintenance planning.