Hayward W400BLGP Vac Lock Safety Wall Fitting (Light Gray, 1-1/2″ MPT)

Part # W400BLGP — a dedicated safety wall fitting by Hayward designed for suction-side automatic pool cleaners. It secures the cleaner hose in place and closes off the vacuum line when the cleaner is removed, helping prevent unintended suction hazards and maintain optimal flow.

Key Features

• 1-1/2″ male pipe thread (MPT) fitting suitable for standard dedicated vacuum lines.
• Spring-loaded “free-rotation” mechanism allows the cleaner hose swivel movement while maintaining secure connection.
• Automatically closes the suction line when the cleaner hose is removed — enhances safety by preventing unsupervised suction flow.
• Durable, corrosion-resistant construction in light-gray finish to match pool equipment and wall fittings.
• Designed for use with Hayward Navigator and other suction-side automatic pool cleaners in dedicated vacuum line installations.

Typical Applications

This wall fitting is used in pool systems equipped with dedicated suction lines for automatic cleaners. It is ideal when installing a suction-side cleaner or upgrading an existing vacuum line to include an anti-entrapment hose lock. If the current fitting allows excessive hose movement, leaks around thread, or lacks automatic shut-off capability, this upgrade is especially beneficial.

Installation & Compatibility Notes

Before installing, turn off the pool pump and relieve system suction. Remove the existing wall fitting and apply pool-safe thread sealant to the 1-1/2″ MPT connections. Thread and tighten the W400BLGP fitting securely. For hose attachment, insert the cleaner hose end into the fitting until it snaps into place, then pull gently to ensure the locking ring engages. When removing the hose, verify the fitting’s internal valve closes and suction is shut off. Back-prime the pump if needed after installation to confirm correct flow.

Why Choose This Fitting?

The Hayward W400BLGP offers both enhanced operational convenience (free rotation hose connection) and important safety functionality (automatic suction shut-off). For pool professionals and homeowners alike, it upgrades the vacuum connection to a more reliable and code-aware solution—especially in systems using suction-side cleaners and dedicated vacuum lines.

Maintenance Tips

• Inspect the fitting annually for wear, cracks or loose threads; replace if the spring mechanism fails or the closure valve sticks.
• Keep the hose end and locking ring clean—debris may prevent proper engagement or closure.
• During seasonal shutdown or winterizing, remove the hose and verify the valve closes fully to prevent unintended suction into the blind line.
• Ensure the hose swivel connection remains smooth—rough or binding movement may indicate internal wear or misalignment.