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Front view of Apollo PVB4A 3/4-inch bronze pressure vacuum breaker (model 4A504A2F) with ball valve shutoffs.

Apollo PVB4A 3/4" Bronze Freeze-Resistant Backflow Preventer

Brand: Conbraco Industries
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$237.63
$178.22
SKU 4A504A2F
In Stock (6)

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The Apollo PVB4A 3/4" pressure vacuum breaker (model 4A504A2F) is a freeze-resistant backflow preventer designed for irrigation and potable water systems. Its bronze body and modular check cartridge provide reliable protection against back-siphonage while minimizing pressure loss.

  • Size & connections: 3/4" FNPT x FNPT; compact 7-5/8" height for tight installations.
  • Construction: Bronze body, captured stainless springs, and replaceable silicone seat disc.
  • Performance: 150 psi maximum operating pressure; temperature rating approximately 33–140°F.
  • Freeze protection: Built-in integral freeze relief valve to reduce freeze damage risk.
  • Serviceability: Easily removable modular check cartridge and ball valve shutoffs with stainless handles.
  • Approvals: Listed to common industry standards (ASSE, IAPMO, NSF/ANSI); see submittal for full listings.

This assembly includes SAE threaded test cocks for draining and is suitable for vertical or horizontal installation. Download the installation manual (IOM) and submittal sheet for complete dimensions, warranty details, and installation guidance.

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Frequently Asked Questions

What size connections does this backflow preventer use?
It uses 3/4" FNPT x FNPT connections. The compact 7-5/8" height fits tight installations.
What ratings and temperature range does the PVB support?
150 psi maximum working pressure; temperature rating approximately 33–140°F. See the datasheet for limits.
Which approvals and standards does this model meet?
Listed to common industry standards including ASSE and IAPMO; consult the submittal sheet for full listings.

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