SKU: 17819901251

Watts 007-040 40mm 1½" DCV Double Check Valve Backflow Preventer Device/Kits

Sale price$247.95 Regular price$275.50
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Description

Watts 007-040 40mm 1½" DCV Double Check Valve Backflow Preventer Device/KitsOverview The listing is for Watts 007 040 40mm 1 1 2" DCV double check valve backflow preventer range in 3 configuration variants Device Only (007 040) Kits with Strainer & 2 Lockable Ball Valves (007 040 LBS) Kits with 2 Unions, Strainer & 2 Lockable Ball Valves (007 040 ULBS) The Watts double check valve DCV backflow preventers are designed to protect portable drinking water in the mains supplies from cross connections from water applications such

Overview

The listing is for Watts 007-040 40mm 1 1/2" DCV double check valve backflow preventer range in 3 configuration variants

- Device Only (007-040)

- Kits with Strainer & 2 Lockable Ball Valves (007-040-LBS)

- Kits with 2 Unions, Strainer & 2 Lockable Ball Valves (007-040-ULBS)

The Watts double check valve DCV backflow preventers are designed to protect portable drinking water in the mains supplies from cross-connections from water applications such as irrigation, fireline or industrial processing. The Watts DCV is compatible with other popular brands such as Fabco, Tyco, Wilkins and Conbraco Apollo.

The use of the Watts double check valves DCV back flow preventer must be in accordance with the Australian national plumbing codes and local plumbing requirements, who shall deem the applications as non-health hazardous in nature. The local authorities will have the jurisdiction regarding the vertical orientation, frequency of testing or any other requirements. 

In other situations where the cross-connections contain hazardous chemicals, such as swimming pools or sewage processing plants, the potential contamination can be lethal or dangerous. The double check valve DCV backflow preventer may be regarded as insufficient protections by the plumbing authorities. In this case, a RPZ reduced pressure zone backflow preventer must be used instead. A RPZ reduced pressure zone backflow preventer's design differs from the DCV by featuring an additional differential release valve as a mechanical fail-safe device which will open and dump contaminated water to isolate the mains water supply. 

A RPZ is usually significantly more expensive than the equivalent DCV counterparts, even though they may look very similar. Customers need to check with the local plumbing authority to ensure the correct backflow preventers are employed for the jobs. 

All Plumbing Online stocks and supplies both Watts DCV and RPZ in full range of sizes and kits configurations. Just ask me any further questions if still unsure between DCVs and RPZs. All Watts DCV and RPZ are Watermark approved and are one of the most popular kits in Australian market due to its reputations and values for money.

 

Technical Details

Manufacturer: Watts
Specifications:

Maximum Working Pressure: 1400 kPa
Temperature Range: 0.5°C to 90°C

Thread Size: BSP 1 1/2", 40mm

Thread Physical Measurements: 47.803mm external male/internal female thread (refer to the BSP vs Physical measurement table chart in the photo gallery)

Material: DR Brass
Features:

  • Ease of maintenance - only one cover 
  • Top entry
  • Replaceable seats and seat discs
  • Modular construction
  • Compact design
  • Cast bronze body construction
  • Top mounted ball valve test cocks 
  • Low pressure drop
  • No Special tools required for servicing 

Intended Use: Prevent backflow to protect drinking water supplies from contamination 

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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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: 17819901251

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Pam Burleson
Bozeman, US
★★★★★ 5
Great product
Color: Black, Style: 1/2 Inch
Nice yoga mat. Perfect thickness for me. Love that I can roll it up and put it out of the way. Gives great knee support and the material is comfortable.
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Reviewed in the United States on May 6, 2026
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Diamond Butterfly
Lake Worth, US
★★★★★ 5
Love my mat!
Color: Pink, Style: 1/2 Inch
I’m new to stretching and recovery classes, and there is a lot of floor work. I was using the gym mats, but my knees, lower back, and glutes were hurting from being on the floor. This mat is the perfect thickness and feels wonderful during floor exercises. It gives me the extra cushion I need without being difficult to use. It’s also lightweight, durable, easy to clean, and easy to roll up for transport. The pink makes me smile. That said , the mat makes the classes more enjoyable.
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Reviewed in the United States on May 2, 2026
R
Verified Purchase
RA
Lowell, US
★★★★★ 5
Great value
Color: Aqua, Style: 1-Inch
Perfect exercise mat. It is nice and thick, and comfortable to kneel and lay on. Can't comment on durability, but so far, so good. Recommended.
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Reviewed in the United States on May 14, 2026
M
Verified Purchase
mocean
Draper, US
★★★★★ 5
Thick, soft, perfect for my service dog to lay on in restaurants, etc.
Color: Blue, Style: 1/2 Inch
I bought this for my service dog to lay on in restaurants, etc. It's super thick and soft. I cut it in half and I'm using the other half for my dog to lay on in the car. Excellent quality and I love the carry strap.
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Reviewed in the United States on June 7, 2026
R
Verified Purchase
Rome
Bozeman, US
★★★★★ 4
Comfortable and thick mat that’s great for workouts at home
Color: Black, Style: 1/2 Inch, Color: Black, Style: 1/2 Inch
I picked up this Amazon Basics extra thick exercise mat for home workouts, and it’s been a solid addition. The thickness is the first thing you notice—it provides good cushioning, especially for exercises where you’re on your knees, elbows, or back. The surface has enough grip to keep you from slipping during most movements, whether you're doing stretching, core work, or basic workouts. It also stays in place pretty well on the floor without sliding around too much. The mat rolls out flat easily and comes with a strap, which makes it convenient to store or carry if needed. It’s lightweight enough to move around but still feels durable. It’s not a high-end studio mat, but for everyday workouts at home, it does exactly what you need it to do. Pros: • Extra thickness provides good cushioning • Comfortable for floor exercises • Lightweight and easy to store • Good value for the price Cons: • Slight compression over time with heavy use • Grip is good but not premium-level Overall, this is a great budget-friendly mat for home workouts, stretching, or basic fitness routines.
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Reviewed in the United States on March 17, 2026

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