AquaStar FillStar Autofill Valve Gunite White 3/4" | AFB101

Fillstar water level control is a pool and spa float valve assembly that maintains water level and provides overflow protection. It installs in the same lid and collar size as Aquastar skimmers and connects to a 3/4" PVC water supply. The valve body and injection-molded float are molded from engineered resin for corrosion-resistant operation and require no transition glue for installation.

Aquastar AFB101 Specifications

Key Features

• Provides overflow protection with adjustable presets
• Fits Aquastar skimmer lid and collar size
• Includes 2" to 1-1/2" PVC bushing
• Includes 3/4" PVC plug when overflow not required
• 3/4" PVC water supply inlet
• Float valve molded from engineered resin
• Injection-molded float with pre-molded 1/2" MPT thread
• No transition glue required for installation

How It Works

Pool automation and control equipment ties the pump, heater, lights, sanitizer and valves together so they run on schedule and can be controlled from a panel, remote or smartphone app. Load centers house the breakers and relays, relays switch equipment on and off, timers schedule run times, temperature controllers manage heat, and water levelers keep water at the right height.

How to Choose the Right Water Leveler

• Match replacement panels, relays and boards to the automation system brand and model.
• Count the circuits and auxiliaries you need now and in the future.
• Confirm compatibility with variable speed pumps, salt systems and lighting.
• For timers and relays, match voltage, amperage and pole configuration.

If you are replacing an existing part, the fastest way to confirm compatibility is to match the brand and model number on the old equipment. Send us the model number or a photo of the label and our team will help confirm the AFB101 is the right fit before you order.

Installation and Safety

Automation equipment involves line-voltage wiring, breakers and bonding. Installation should be performed by a licensed electrician or qualified pool professional in accordance with NEC Article 680 and the manufacturer's instructions. Turn off power at the breaker before servicing.

Maintenance Tips

• Keep firmware updated where supported.
• Inspect relays and wiring for heat damage.
• Check the panel door seals and keep the enclosure free of insects.
• Test GFCI breakers monthly.

What's Included

This listing is for the Aquastar AFB101 as described in the specifications above. Plumbing, wiring, unions and accessories are not included unless they are listed in the product name or specifications.

Built for Homeowners, Pool Pros and Property Managers

• Homeowners: match your existing model number, then reach out if you want a second set of eyes on compatibility before you order.
• Pool service pros and builders: order quickly, track every shipment, and reorder common parts for your routes and builds.
• Property managers and commercial pools: standardize equipment across properties and plan replacements with help from our team.

White Paper

• Aquastar AFB101 Installation Guide (PDF)
• Aquastar AFB101 Specification Sheet (PDF)
• Aquastar AFB101 Line Drawing (PDF)

Frequently Asked Questions About the Aquastar AFB101

Can I add automation to an existing pool?

Yes, most systems are designed for retrofit; count your equipment and choose a system with enough relays.

Will this work with my pump and heater?

Check the compatibility list on the specifications or contact our team with your equipment models.

Do I need an electrician?

Yes, line-voltage automation wiring and bonding should be done by a licensed electrician.

Is this the genuine Aquastar part?

Yes. It is brand new Aquastar equipment (model AFB101) covered by the manufacturer warranty. Warranty terms vary by product and application; see the manufacturer documentation or ask our team.