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Matco-Norca 646AS4 Brass Hose-End Backflow Preventer

Matco-Norca 646AS4 Brass Hose-End Backflow Preventer

Brand: MATCO NORCA
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$14.28
$10.71
SKU 646AS4

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The Matco-Norca 646AS4 brass hose-end backflow preventer stops contaminated water from flowing back into your potable supply. Its compact, serviceable design fits standard garden hose connections and is built for reliable outdoor use.

  • Material: Brass body with corrosion-resistant finish for long service life.
  • Thread Size: Fits 3/4-inch garden hose threads (GHT), female-to-male hose connection.
  • Approvals: Conforms to ASSE 1011 and is UPC/IAPMO listed for potable applications.
  • Security: Break-away set screw secures the unit to the hose bibb and deters tampering.
  • Performance: Rated to 125 PSI and compatible with nitrile softgoods up to 180°F.
  • Installation: Compact, tool-assisted installation for typical outdoor faucets and hose setups.

Designed for residential landscaping, irrigation, and general outdoor water use, the 646AS4 provides dependable backflow protection when installed on hose bibbs and portable equipment. Follow local plumbing codes for backflow prevention and replace units that show wear or damage.

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Frequently Asked Questions

What thread size and connections does the 646AS4 use?
Fits standard 3/4-inch garden hose threads (GHT), providing a female-to-male hose connection for hose bibbs and portable equipment.
Is the 646AS4 certified for use on potable water supplies?
Yes. The 646AS4 conforms to ASSE 1011 and is UPC/IAPMO listed to protect potable water from hazardous backflow.
What are the pressure and temperature limits for this preventer?
Rated to 125 PSI and compatible with nitrile softgoods up to 180°F; intended for typical residential outdoor use.

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