SKU: 50138749027

Watts Backflow Preventer 3/4 In Water Pressure Reducing Valve

Sale price$94.04 Regular price$104.49
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Description

Watts Backflow Preventer 3/4 In Water Pressure Reducing ValveThe Watts 3 4" Water Pressure Reducing Valve with built in backflow prevention helps regulate incoming water pressure between 2575 psi. Designed for residential and commercial systems, it supports up to 400 psi max working pressure and features NPT union x NPT female connections for easy installation. Product Specification: Inlet Outlet Size: 3 4 inch NPT Union x NPT Female Adjustable Pressure Range: 2575 psi Max Working Pressure: 400 psi Key

The Watts 3/4" Water Pressure Reducing Valve with built-in backflow prevention helps regulate incoming water pressure between 25–75 psi. Designed for residential and commercial systems, it supports up to 400 psi max working pressure and features NPT union x NPT female connections for easy installation.

Product Specification:

  • Inlet/Outlet Size: 3/4 inch NPT Union x NPT Female
  • Adjustable Pressure Range: 25–75 psi
  • Max Working Pressure: 400 psi

Key Features:

Built-In Backflow Prevention: Prevents reverse water flow to protect your supply from contamination, ensuring safer plumbing operation.
High Pressure Tolerance: Handles up to 400 psi working pressure, suitable for residential, commercial, and irrigation systems.
Adjustable Pressure Control: Allows precise regulation of downstream water pressure from 25 to 75 psi for consistent flow.
Threaded NPT Connections: Features union x NPT female threading for a secure, leak-free fit and easier maintenance or replacement.
 Brass Body Construction: Made from durable lead-free brass for corrosion resistance and long service life in various environments.

How it Works:

The Watts 3/4" water pressure reducing valve connects to your plumbing system using NPT union x female threads. Once installed, it automatically reduces high inlet water pressure to a safer, adjustable downstream level (25–75 psi), protecting pipes, fixtures, and appliances. The integrated backflow preventer stops water from flowing in reverse, safeguarding your water supply. Its internal spring and diaphragm mechanism respond to pressure fluctuations, providing stable water flow and reducing wear on the plumbing system over time.

FAQs:

Can I install this valve vertically?

Yes, it can be installed vertically or horizontally, but performance is optimal when installed horizontally with the spring bonnet upright.

How do I adjust the pressure setting?

Use a wrench to turn the adjustment screw on the top of the valve—clockwise increases, counterclockwise decreases the pressure.

Does this valve need regular maintenance?

It’s low maintenance, but periodic checks and cleaning of the strainer screen are recommended to ensure performance.

Is this valve compliant with lead-free plumbing codes?

Yes, it is made from lead-free brass and complies with NSF/ANSI 61 and 372 standards.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 50138749027

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4.5 ★★★★★
Based on 24 reviews
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Product Reviews
J
Verified Purchase
Jerry D
Whiting, US
★★★★★ 3
Hard to install as instructed.
Size: 32 oz
Nearly impossible to get it in the tire through the valve. Yes I removed the valve core. Broke the bead on the tire and dumped it in. That worked great! So far no leaks. They should definitely redesign the installation method.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
B
Verified Purchase
bsync
Alexandria, US
★★★★★ 5
Been using it for 15 years! Not sure where the Neg reviews come from?
Size: 16 oz
I've been using Liquitube since around 2010. I use it religiously in my ATVs and lawn tractor tires. Since I've been using this stuff, I've never had a flat before. I've pulled out nails and slivers of steel out of my ATV tires but yet none of them lose air or go flat. I think some of the negative reviews come from improper use of the product or not enough of the product is being used in the tires. I think this come from variance in formula charts that Liquitube has had in the past on their bottles and on their website. The chart on their website wouldn't match the formula that was provided on the bottle. So I think alot of people get mixed up and not knowing the correct amount to add to each tire. Now Liquitube just puts pictures on the side of the bottle with an ounce measurement below each picture to tell people how to use it. But even that can be confusing. For instance, take the picture of the ATV that they show. Below the ATV it says 32oz. Now some people probably think the 32oz is for the entire ATV. Well that isn't the case. They want you to use 32oz Per Tire! Years ago Liquitube even used to say on the bottle to use 32oz per tire on an ATV. Now they just show a picture with an amount below it. Now you'll come to find out that the 32oz they recommend doesn't match up to the formula they tell you to use to calculate how much each tire is supposed to get. So if you use the formula provided, you come to find that it calculates out to use less product per tire than what the bottle tells you to use. So that's very confusing as well. So if you use it long enough, you'll be able to know how much each tire will need from experience. Just make sure there's enough on the inside of the tire to coat the entire inside as well as leaving a bit left over to circulate in the tire so it can be ready for a large puncture if that ever happens. All in all, it's a good product that does what it claims. It lasts for as long as the tire does and it doesn't freeze up in the cold either! 5 stars!
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Reviewed in the United States on February 13, 2026
K
Verified Purchase
KW
Belleville, US
★★★★★ 5
Worked on slow leak… one month already!!!
Style: 18oz
Edit: Still holding proper pressure at 2-months !!! Had a slow leak where my tire went from 44psi to ~18psi over 2-3 days… Dashboard light would let me know every few days that I had a tire problem and I would inflate the tire back up to 44psi… Anyway, I used this product and filled air back to 44 psi and it’s held the pressure for a month already !!!! Be sure to deflate tire to ~15 PSI before adding the product… it only took about 30 seconds to empty the container into my tire with the tire pressure low. Very happy with this product !!!
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Reviewed in the United States on April 6, 2026
K
Verified Purchase
Kindle Customer
Whiting, US
★★★★★ 5
Excellent stuff!
Style: 18oz
Used this on a Z-Trac with a flat and it fixed it and has held up for over 8 months.
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Reviewed in the United States on May 11, 2026
J
Verified Purchase
John V. Green
Houston, US
★★★★★ 5
Greats stuff
Style: 14oz
Works super, has kept air steaycfor over 6 months, no leaks
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026

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