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Brass vacuum breaker with FNPT threads, compact cylindrical form

Apollo

Apollo 3820401 Vacuum Breaker 3/4 in FNPT Brass 125 psi

SKU CH-7CV6-QTCJS

Prevents backflow in plumbing systems with a 3/4 inch FNPT brass body rated for 125 psi and 212 degrees Fahrenheit, meeting ASSE 1001-2008 standards

  • Size3/4 in
  • Prevents backflow with ASSE 1001-2008 certification
  • Handles 125 psi pressure in brass construction
  • Withstands 212°F operating temperature range
  • Compact 3-inch height fits tight spaces
  • Reliable silicone seal ensures leak-free operation

Apollo 3820401 Vacuum Breaker

The Apollo 3820401 vacuum breaker installs on a 3/4 inch FNPT connection to stop back-siphonage in plumbing systems. Its brass body and silicone seal handle water up to 212 degrees Fahrenheit and 125 psi working pressure. The unit meets ASSE 1001-2008 requirements for point-of-use protection.

Upgrade from unprotected outlets

Replaces an open hose bibb or faucet that has no anti-siphon device, adding code-compliant protection where a hose can be left submerged. The jump is worth it when local plumbing codes require a listed vacuum breaker on every threaded outlet.

Sustained pressure and temperature

Brass construction resists corrosion during continuous exposure to potable water at the rated 125 psi. Silicone seals maintain elasticity through repeated thermal cycles up to the 212 degree maximum. The compact 3 inch height and 2 inch width fit tight mechanical rooms without stressing adjacent piping.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $27.99
Cheaper than about 62% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameAPOLLO
Product typeOther
Size & build
Size3/4 in

Questions about this item

What thread size and type does the 3/4 in FNPT vacuum breaker need to mount?

It uses a 3/4 inch female national pipe thread connection, so it screws directly onto a matching male NPT fitting without extra adapters.

Which step is often missed when installing the brass vacuum breaker with a silicone seal?

Applying thread sealant or tape to the male NPT threads before tightening is the step most often skipped, and it prevents leaks at the joint.

When should the internal silicone seal be inspected or replaced on this ASSE 1001-2008 device?

Check the silicone seal annually or if you see water dripping from the vent, since the seal degrades over time and with repeated 212 °F exposure.

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