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.

Questions about returns? View our return policy.

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Monday - Friday: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

We do not ship on Saturday or Sunday.
Orders totaling more than $300 will require signature confirmation upon delivery.
We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
Expedited shipping options are available at checkout.

Return Policy:

Products that are received damaged will receive a refund in store credit.
Most products are eligible for return within 30 days of receipt, except where noted below.
To initiate a return, please complete an RMA form prior to sending your item back.
Original shipping costs are non-refundable and will be deducted from the return credit.
Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
Some returns will be charged an automatic 15% restocking fee.
We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
Please complete the return form to receive your RMA number and return shipping label.
Chemical products are not eligible for return under any circumstances.
The Pentair Colorsync 618031 is not eligible for return.
Pool cleaners are not eligible for return.
Opened seals and o-rings are not eligible for return.
Capacitors are not eligible for return.
Plastic popup tools are not eligible for return.
Automation components and circuit boards are not eligible for return.
If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.