A Simple, Effective Way to Secure Unused Pool Suction Ports

Unused or exposed suction ports can create unnecessary safety risks in swimming pools. The Swimables SW-30-403 Vac Lock 1.5” MPT – Dark Gray is a dedicated suction safety device designed to securely seal unused vacuum and suction ports when they are not actively connected to a pool cleaner.

By threading directly into compatible suction fittings, this Vac Lock blocks direct access to suction pressure, helping reduce entrapment risk while also preventing debris from entering the plumbing line. Its dark gray finish offers a low-profile, professional appearance that blends well with common pool fittings.

This is a pool-specific suction safety component, not a toy, drain cover, or general-purpose plumbing plug.

What a Vac Lock Does in a Pool System

A Vac Lock installs into a threaded suction or vacuum port and physically blocks the opening. This eliminates direct access to suction force while the port is idle.

A properly installed Vac Lock helps:

• Reduce suction entrapment risk

• Secure unused vacuum ports

• Prevent debris from entering suction plumbing

• Maintain cleaner system hydraulics

• Support safer pool operation

Vac Locks are especially important on pools with dedicated vacuum lines that are not always connected to an automatic cleaner.

Vac Lock use is commonly recommended alongside items in the Pool Safety Equipment Collection.

1.5” MPT Threaded Compatibility

The Swimables SW-30-403 Vac Lock uses 1.5-inch Male Pipe Thread (MPT) sizing, making it compatible with many standard pool vacuum and suction fittings.

Compatibility highlights include:

• 1.5” threaded vacuum ports

• Dedicated suction lines

• Standard pool wall and floor fittings

• Common residential and commercial pool plumbing layouts

The threaded design allows for a secure, dependable installation that resists vibration and accidental removal.

Why Vac Locks Are an Important Safety Measure

Suction entrapment is a known pool safety hazard, particularly at unused or overlooked vacuum ports. Even when a port is rarely used, leaving it open exposes swimmers to unnecessary risk.

Installing a Vac Lock:

• Eliminates open suction access points

• Helps protect swimmers and children

• Reduces liability for pool owners

• Supports safer equipment and circulation systems

• Complements other suction safety strategies

While Vac Locks do not replace certified drain covers or SVRS systems, they are an important part of a layered pool safety approach.

For additional suction-related components, this product pairs well with items from the Pool Plumbing Parts Collection.

Durable Construction for Pool Environments

The Swimables SW-30-403 Vac Lock is manufactured specifically for long-term use in pool conditions.

Design considerations include:

• Resistance to chlorinated and saltwater exposure

• Durable plastic construction

• Secure threading for consistent fit

• Dark gray finish that blends with pool fittings

These features help ensure the Vac Lock remains effective and reliable throughout the swimming season and beyond.

Common Situations Where Vac Locks Are Used

Vac Locks are commonly installed in the following scenarios:

• Dedicated vacuum lines not currently in use

• Pools without permanent suction-side cleaners

• Seasonal shutdowns or winterization

• Temporary safety measures during repairs

• Preventing debris entry into unused suction lines

Many pool service professionals install Vac Locks as a best-practice safety measure during routine maintenance visits.

If your pool uses suction-side cleaners, related equipment can be found in the Pool Cleaners Collection.

Installation Considerations

Installing a Vac Lock is straightforward but should be done correctly to ensure a secure seal.

General Installation Overview:

1. Turn off the pool pump

2. Ensure the suction line is not under vacuum

3. Clean the threaded port

4. Thread the SW-30-403 Vac Lock into the port

5. Hand-tighten until snug—do not overtighten

6. Restart the system and check for air leaks

No tools are typically required. Over-tightening can damage threads or fittings.

Supports Overall Circulation System Performance

By sealing unused suction ports, Vac Locks help maintain balanced suction and system integrity.

This can help:

• Reduce unwanted air entry

• Improve pump priming stability

• Protect internal plumbing

• Support consistent filtration performance

For complete circulation health, suction safety devices should be used alongside components from the Pool Pumps Collection.

Ideal Applications

The Swimables SW-30-403 Vac Lock is ideal for:

• Residential in-ground pools

• Commercial pools with unused vacuum lines

• Pools transitioning away from suction cleaners

• Safety-focused maintenance programs

• Preventative plumbing protection

This Vac Lock is a low-cost upgrade that delivers meaningful safety and system benefits.

Why Choose Swimables Pool Safety Components

Swimables products are designed specifically for pool environments, offering dependable compatibility and performance.

Key advantages include:

• Pool-industry-specific design

• Accurate 1.5” MPT threading

• Durable materials for repeated use

• Trusted compatibility with standard pool fittings

The SW-30-403 Vac Lock is a reliable solution for securing unused suction ports safely and effectively.

Buy with Confidence from Benchmark Pool Supply

At Benchmark Pool Supply, we focus on pool-specific safety and equipment solutions—not generic substitutes. The Swimables SW-30-403 Vac Lock 1.5” MPT – Dark Gray is selected to meet real-world service needs and improve pool safety.

When you purchase from Benchmark Pool Supply, you receive:

• Pool-specific safety components

• Clear compatibility guidance

• Fast shipping or convenient local pickup

• Support from knowledgeable pool professionals

We help pool owners and service pros implement smart, safety-focused solutions.