Backflow Preventer 3/4" FHT x 3/4" MHT

Backflow Preventer 3/4 in. FHT x 3/4 in. MHT

In Stock

The 3/4" FHT plastic back-flow preventer (anti-siphon valve) from Hendrickson Bros. is an effective and economical way to eliminate the risk of back-flow contamination from an outdoor hose bib (faucet) or other water outlet with hose threads. Constructed of high-strength ABS plastic the back-flow preventer is made of corrosion resistant material with outstanding reliability and long life. The devises are laboratory tested and industry approved since 1984.

Part #: A015

$3.11 ea.

( 4 ratings/reviews )

Part family: 3/4" Backflow Preventer with Hose or Pipe Thread
Included with kits: KIT EF55AS, KIT FM01AS, KIT FS50, KIT G77AS, KIT GE200, KIT GE200PLUS, KIT K001, KIT K002, KIT K003, KIT K004, KIT K005, KIT K006, KIT K007, KIT K008, KIT K009, KIT K016, KIT K017, KIT K018, KIT K020, KIT K021, KIT K022, KIT K025, KIT K026, KIT K027, KIT K029, KIT K031, KIT K100, KIT ML50, KIT R750, KIT ST100, KIT VA007, KIT VA016, KIT VA020, KIT VA021, KIT VA022

Description
Reviews
Specifications
Features

The 3/4" plastic back-flow preventer (anti-siphon valve) from Hendrickson Bros.is available in 3/4" with female hose thread or pipe thread. The back-flow device is installed at the beginning of a drip irrigation system and is used to prevent water from back siphoning into the water supply line. The back-flow device should always be used when applying fertilizer and when applying fertilizer the back-flow device should be the first item installed after the faucet. Install it with a pressure regulator with hose or pipe thread.

Important: This type of back-flow device (vacuum breaker) cannot be used under continuous pressure.
Codes do not permit the use of this device under continuous pressure as the back-flow device can stop functioning in emergency conditions. If used under constant pressure, the back-flow device can crack and fail due to a pressure surge when downstream valves close. Some municipalities or local water districts require the use of back-flow device/atmospheric vacuum breakers. Make sure to check your local city code to see if you need to install this device.

By: dunecrane, 05/19/12

These came with the controllers I ordered, and lasted almost all of one season. I upgraded to the heavier duty model (AO32).

By: domerese, 03/07/11

first year of use this began leaking in the first few months on two of my lines out of four

By: kjkessler, 09/09/08

Without a doubt, this backflow preventer is the weakest link in my drip system. Small cracks appear within weeks, which cause my system to leak like crazy. I've changed this model out three or four times now, making adjustments along the way to alleviate excess pressure or strain, and nothing works. I'm now going to try the heavy duty model. Save yourself some money and aggravation and avoid this product.

By: rsolem, 08/04/08

I purchased 2 of these backflow preventers and both of them developed small cracks that rendered them unusable. They were only hand tightened and shouldn't have cracked. I think that it could have been the weight of the water filter assembly (F065) that may have contributed to this.

Available: 3/4" FHT x MHT , 3/4" FNPT x MNPT
Color: Black
Materials: High-strength ABS
Maximum pressure: 100 PSI
Maximum working temperature: 130 degree F
Recommended flow rate: up to 8 GPM